@inproceedings{PfaffMoshiriReichetal.2017, author = {Pfaff, Raphael and Moshiri, Amir and Reich, Alexander and G{\"a}bel, Markus}, title = {Modelling of the effect of sanding on the wheel-rail adhesion area}, series = {First International Conference on Rail Transportation}, booktitle = {First International Conference on Rail Transportation}, pages = {1 -- 7}, year = {2017}, language = {en} } @inproceedings{ShahidiPfaffEnning2017, author = {Shahidi, Parham and Pfaff, Raphael and Enning, Manfred}, title = {The connected wagon - a concept for the integration of vehicle side sensors and actors with cyber physical representation for condition based maintenance}, series = {First International Conference on Rail Transportation}, booktitle = {First International Conference on Rail Transportation}, pages = {1 -- 8}, year = {2017}, language = {en} } @inproceedings{PfaffShahidiEnning2017, author = {Pfaff, Raphael and Shahidi, Parham and Enning, Manfred}, title = {Connected freight rail rolling stock: a modular approach integrating sensors, actors and cyber physical systems for operational advantages and condition based maintenance}, series = {Asia-Pacific Conference of the Prognostics and Health Management Society}, booktitle = {Asia-Pacific Conference of the Prognostics and Health Management Society}, pages = {1 -- 7}, year = {2017}, language = {en} } @inproceedings{Pfaff2017, author = {Pfaff, Raphael}, title = {Analysis of Big Data Streams to obtain Braking Reliability Information for Train Protection systems}, series = {Asia-Pacific Conference of the Prognostics and Health Management Society}, booktitle = {Asia-Pacific Conference of the Prognostics and Health Management Society}, pages = {1 -- 7}, year = {2017}, language = {en} } @incollection{KallweitGottschalkWalenta2016, author = {Kallweit, Stephan and Gottschalk, Michael and Walenta, Robert}, title = {ROS based safety concept for collaborative robots in industrial applications}, series = {Advances in robot design and intelligent control : proceedings of the 24th International Conference on Robotics in Alpe-Adria-Danube Region (RAAD). (Advances in intelligent systems and computing ; 371)}, booktitle = {Advances in robot design and intelligent control : proceedings of the 24th International Conference on Robotics in Alpe-Adria-Danube Region (RAAD). (Advances in intelligent systems and computing ; 371)}, publisher = {Springer}, address = {Cham}, organization = {International Conference on Robotics in Alpe-Adria-Danube Region <24, 2015, Bucharest>}, isbn = {978-3-319-21289-0 (Print) ; 978-3-319-21290-6 (E-Book)}, doi = {10.1007/978-3-319-21290-6_3}, pages = {27 -- 35}, year = {2016}, abstract = {The production and assembly of customized products increases the demand for flexible automation systems. One approach is to remove the safety fences that separate human and industrial robot to combine their skills. This collaboration possesses a certain risk for the human co-worker, leading to numerous safety concepts to protect him. The human needs to be monitored and tracked by a safety system using different sensors. The proposed system consists of a RGBD camera for surveillance of the common working area, an array of optical distance sensors to compensate shadowing effects of the RGBD camera and a laser range finder to detect the co-worker when approaching the work cell. The software for collision detection, path planning, robot control and predicting the behaviour of the co-worker is based on the Robot Operating System (ROS). A first prototype of the work cell shows that with advanced algorithms from the field of mobile robotics a very flexible safety concept can be realized: the robot not simply stops its movement when detecting a collision, but plans and executes an alternative path around the obstacle.}, language = {en} } @inproceedings{NakagawaKallweitMichauxetal.2016, author = {Nakagawa, Masaki and Kallweit, Stephan and Michaux, Frank and Hojo, Teppei}, title = {Typical Velocity Fields and Vortical Structures around a Formula One Car, based on Experimental Investigations using Particle Image Velocimetry}, series = {SAE International Journal of Passenger Cars - Mechanical Systems}, booktitle = {SAE International Journal of Passenger Cars - Mechanical Systems}, issn = {1946-4002}, doi = {10.4271/2016-01-1611}, pages = {18 S.}, year = {2016}, language = {en} } @book{GebhardtHoetter2016, author = {Gebhardt, Andreas and H{\"o}tter, Jan-Steffen}, title = {Additive manufacturing : 3D printing for prototyping and manufacturing}, publisher = {Hanser Publishers}, address = {Munich}, isbn = {978-1-56990-582-1 ; 978-1-56990-583-8}, pages = {591 S.}, year = {2016}, language = {en} } @article{KosterScheidweilerTieves2016, author = {Koster, Arie and Scheidweiler, Robert and Tieves, Martin}, title = {A flow based pruning scheme for enumerative equitable coloring algorithms}, series = {A flow based pruning scheme for enumerative equitable coloring algorithms}, journal = {A flow based pruning scheme for enumerative equitable coloring algorithms}, doi = {10.48550/arXiv.1607.08754}, pages = {1 -- 30}, year = {2016}, abstract = {An equitable graph coloring is a proper vertex coloring of a graph G where the sizes of the color classes differ by at most one. The equitable chromatic number is the smallest number k such that G admits such equitable k-coloring. We focus on enumerative algorithms for the computation of the equitable coloring number and propose a general scheme to derive pruning rules for them: We show how the extendability of a partial coloring into an equitable coloring can be modeled via network flows. Thus, we obtain pruning rules which can be checked via flow algorithms. Computational experiments show that the search tree of enumerative algorithms can be significantly reduced in size by these rules and, in most instances, such naive approach even yields a faster algorithm. Moreover, the stability, i.e., the number of solved instances within a given time limit, is greatly improved. Since the execution of flow algorithms at each node of a search tree is time consuming, we derive arithmetic pruning rules (generalized Hall-conditions) from the network model. Adding these rules to an enumerative algorithm yields an even larger runtime improvement.}, language = {en} } @article{BeckenbachScheidweiler2016, author = {Beckenbach, Isabel and Scheidweiler, Robert}, title = {Perfect ƒ-Matchings and ƒ-Factors in Hypergraphs - A Combinatorial Approach}, series = {Discrete Mathematics}, volume = {240}, journal = {Discrete Mathematics}, number = {10}, publisher = {Elsevier}, address = {Amsterdam}, issn = {2192-7782}, doi = {10.1016/j.disc.2017.05.005}, pages = {2499 -- 2506}, year = {2016}, abstract = {We prove characterizations of the existence of perfect ƒ-matchings in uniform mengerian and perfect hypergraphs. Moreover, we investigate the ƒ-factor problem in balanced hypergraphs. For uniform balanced hypergraphs we prove two existence theorems with purely combinatorial arguments, whereas for non-uniform balanced hypergraphs we show that the ƒ-factor problem is NP-hard.}, language = {en} } @article{ScheidweilerTriesch2016, author = {Scheidweiler, Robert and Triesch, Eberhard}, title = {A note on the duality between matchings and vertex covers in balanced hypergraphs}, series = {Journal of Combinatorial Optimization}, volume = {32}, journal = {Journal of Combinatorial Optimization}, number = {2}, publisher = {Springer}, address = {Berlin}, issn = {1573-2886}, doi = {10.1007/s10878-015-9887-5}, pages = {639 -- 644}, year = {2016}, abstract = {We present a new Min-Max theorem for an optimization problem closely connected to matchings and vertex covers in balanced hypergraphs. The result generalizes Kőnig's Theorem (Berge and Las Vergnas in Ann N Y Acad Sci 175:32-40, 1970; Fulkerson et al. in Math Progr Study 1:120-132, 1974) and Hall's Theorem (Conforti et al. in Combinatorica 16:325-329, 1996) for balanced hypergraphs.}, language = {en} } @article{RieperGebhardtStucker2016, author = {Rieper, Harald and Gebhardt, Andreas and Stucker, Brent}, title = {Selective Laser Melting of the Eutectic Silver-Copper Alloy Ag 28 wt \% Cu}, series = {RTejournal - Forum f{\"u}r Rapid Technologie}, volume = {13}, journal = {RTejournal - Forum f{\"u}r Rapid Technologie}, issn = {1614-0923}, url = {http://nbn-resolving.de/nbn:de:0009-2-44141}, year = {2016}, abstract = {The aim of this work was to perform a detailed investigation of the use of Selective Laser Melting (SLM) technology to process eutectic silver-copper alloy Ag 28 wt. \% Cu (also called AgCu28). The processing occurred with a Realizer SLM 50 desktop machine. The powder analysis (SEM-topography, EDX, particle distribution) was reported as well as the absorption rates for the near-infrared (NIR) spectrum. Microscope imaging showed the surface topography of the manufactured parts. Furthermore, microsections were conducted for the analysis of porosity. The Design of Experiments approach used the response surface method in order to model the statistical relationship between laser power, spot distance and pulse time.}, language = {en} } @inproceedings{KesslerBalcGebhardt2016, author = {Kessler, Julia and Balc, Nicolae and Gebhardt, Andreas}, title = {Basic research on lattice structures focused on the strut shape and welding beads}, series = {Physics Procedia}, volume = {Vol. 83}, booktitle = {Physics Procedia}, issn = {1875-3884}, doi = {10.1016/j.phpro.2016.08.086}, pages = {833 -- 838}, year = {2016}, language = {en} } @inproceedings{KleineKallweitMichauxetal.2016, author = {Kleine, Harald and Kallweit, Stephan and Michaux, Frank and Havermann, Marc and Olivier, Herbert}, title = {PIV Measurement of Shock Wave Diffraction}, series = {18th International Symposium on Applications of Laser Techniques to Fluid Mechanics, 2016, Lissabon}, booktitle = {18th International Symposium on Applications of Laser Techniques to Fluid Mechanics, 2016, Lissabon}, pages = {1 -- 14}, year = {2016}, language = {en} } @inproceedings{SchleupenEngemannBagherietal.2016, author = {Schleupen, Josef and Engemann, Heiko and Bagheri, Mohsen and Kallweit, Stephan}, title = {The potential of SMART climbing robot combined with a weatherproof cabin for rotor blade maintenance}, series = {17th European Conference on Composite Materials - ECCM, Munich, Germany}, booktitle = {17th European Conference on Composite Materials - ECCM, Munich, Germany}, pages = {1 -- 8}, year = {2016}, language = {en} } @inproceedings{RieperGebhardtStucker2016, author = {Rieper, Harald and Gebhardt, Andreas and Stucker, Brent}, title = {Process parameters for Selective Laser Melting of AgCu7}, series = {DDMC, Fraunhofer Direct Digital Manufacturing Conference, 3}, booktitle = {DDMC, Fraunhofer Direct Digital Manufacturing Conference, 3}, publisher = {Fraunhofer-Verlag}, address = {Stuttgart}, isbn = {978-3-8396-1001-5}, pages = {171 -- 176}, year = {2016}, language = {en} } @inproceedings{KoenigWolf2016, author = {K{\"o}nig, Johannes Alexander and Wolf, Martin}, title = {A new definition of competence developing games - and a framework to assess them}, series = {ACHI 2016 : The Ninth International Conference on Advances in Computer-Human Interactions}, booktitle = {ACHI 2016 : The Ninth International Conference on Advances in Computer-Human Interactions}, isbn = {978-1-61208-468-8}, pages = {95 -- 97}, year = {2016}, abstract = {There are different types of games that try to make use of the motivation of a gaming situation in learning contexts. This paper introduces the new terminology 'Competence Developing Game' (CDG) as an umbrella term for all games with this intention. Based on this new terminology, an assessment framework has been developed and validated in scope of an empirical study. Now, all different types of CDGs can be evaluated according to a defined and uniform set of assessment criteria and, thus, are comparable according to their characteristics and effectiveness.}, language = {en} } @incollection{FrotscherGossmannRaatschenetal.2015, author = {Frotscher, Ralf and Goßmann, Matthias and Raatschen, Hans-J{\"u}rgen and Temiz Artmann, Ayseg{\"u}l and Staat, Manfred}, title = {Simulation of cardiac cell-seeded membranes using the edge-based smoothed FEM}, series = {Shell and membrane theories in mechanics and biology. (Advanced structured materials ; 45)}, booktitle = {Shell and membrane theories in mechanics and biology. (Advanced structured materials ; 45)}, publisher = {Springer}, address = {Heidelberg}, isbn = {978-3-319-02534-6 ; 978-3-319-02535-3}, pages = {187 -- 212}, year = {2015}, abstract = {We present an electromechanically coupled Finite Element model for cardiac tissue. It bases on the mechanical model for cardiac tissue of Hunter et al. that we couple to the McAllister-Noble-Tsien electrophysiological model of purkinje fibre cells. The corresponding system of ordinary differential equations is implemented on the level of the constitutive equations in a geometrically and physically nonlinear version of the so-called edge-based smoothed FEM for plates. Mechanical material parameters are determined from our own pressure-deflection experimental setup. The main purpose of the model is to further examine the experimental results not only on mechanical but also on electrophysiological level down to ion channel gates. Moreover, we present first drug treatment simulations and validate the model with respect to the experiments.}, language = {en} } @article{FateriGebhardt2015, author = {Fateri, Miranda and Gebhardt, Andreas}, title = {Selective Laser Melting of Soda-Lime Glass Powder}, series = {International Journal of Applied Ceramic Technology}, volume = {12}, journal = {International Journal of Applied Ceramic Technology}, number = {1}, publisher = {Wiley-Blackwell}, address = {Oxford}, issn = {1744-7402}, doi = {10.1111/ijac.12338}, pages = {53 -- 61}, year = {2015}, language = {en} } @article{FateriGebhardt2015, author = {Fateri, Miranda and Gebhardt, Andreas}, title = {Process Parameters Development of Selective Laser Melting of Lunar Regolith for On-Site Manufacturing Applications}, series = {International Journal of Applied Ceramic Technology}, volume = {12}, journal = {International Journal of Applied Ceramic Technology}, number = {1}, publisher = {Wiley-Blackwell}, address = {Oxford}, isbn = {1744-7402}, doi = {10.1111/ijac.12326}, pages = {46 -- 52}, year = {2015}, language = {en} } @article{FateriGebhardt2015, author = {Fateri, Miranda and Gebhardt, Andreas}, title = {Additive manufactured mechanical disentanglement lock}, series = {RTejournal - Forum f{\"u}r Rapid Technologie}, volume = {12}, journal = {RTejournal - Forum f{\"u}r Rapid Technologie}, publisher = {Fachhochschule Aachen}, address = {Aachen}, issn = {1614-0923}, url = {http://nbn-resolving.de/urn:nbn:de:0009-2-42147}, year = {2015}, language = {en} } @inproceedings{GrossmannGabrielliHerdrichetal.2015, author = {Großmann, Agnes and Gabrielli, Roland Antonius and Herdrich, Georg and Fasoulas, Stefanos and Schnauffer, Peter and Middendorf, Peter and Fateri, Miranda and Gebhardt, Andreas}, title = {Overview of the MultiRob 3D Lunar Industrial Development Project}, series = {Conference Contribution for the 30th ISTS, Kobe, Japan, 04.07.-10.07.2015}, booktitle = {Conference Contribution for the 30th ISTS, Kobe, Japan, 04.07.-10.07.2015}, pages = {8 S.}, year = {2015}, language = {en} } @inproceedings{AlhwarinFerreinGebhardtetal.2015, author = {Alhwarin, Faraj and Ferrein, Alexander and Gebhardt, Andreas and Kallweit, Stephan and Scholl, Ingrid and Tedjasukmana, Osmond Sanjaya}, title = {Improving additive manufacturing by image processing and robotic milling}, series = {2015 IEEE International Conference on Automation Science and Engineering (CASE), Aug 24-28, 2015 Gothenburg, Sweden}, booktitle = {2015 IEEE International Conference on Automation Science and Engineering (CASE), Aug 24-28, 2015 Gothenburg, Sweden}, doi = {10.1109/CoASE.2015.7294217}, pages = {924 -- 929}, year = {2015}, language = {en} } @article{KesslerBalcGebhardtetal.2015, author = {Kessler, Julia and Balc, Nicolae and Gebhardt, Andreas and Abbas, Karim}, title = {Basic Research on Lattice Structures Focused on the Tensile Strength}, series = {Applied Mechanics and Materials}, volume = {Vol. 808}, journal = {Applied Mechanics and Materials}, publisher = {Trans Tech Publications}, address = {B{\"a}ch}, issn = {1662-7482}, doi = {10.4028/www.scientific.net/AMM.808.193}, pages = {193 -- 198}, year = {2015}, language = {en} } @inproceedings{FateriGebhardtGabriellietal.2015, author = {Fateri, Miranda and Gebhardt, Andreas and Gabrielli, Roland Antonius and Herdrich, Georg and Fasoulas, Stefanos and Großmann, Agnes and Schnauffer, Peter and Middendorf, Peter}, title = {Additive Manufacturing of Lunar Regolith for Extra-terrestrial Industry Plant}, series = {International Symposium on Space Technology and Science (ICTS). July 2015, Kobe, Japan}, booktitle = {International Symposium on Space Technology and Science (ICTS). July 2015, Kobe, Japan}, pages = {5 S.}, year = {2015}, language = {en} } @inproceedings{GabrielliMathiesGrossmannetal.2015, author = {Gabrielli, Roland Antonius and Mathies, Johannes and Großmann, Agnes and Herdrich, Georg and Fasoulas, Stefanos and Middendorf, Peter and Fateri, Miranda and Gebhardt, Andreas}, title = {Space Propulsion Considerations for a Lunar Take Off Industry Based on Regolith}, series = {International Symposium on Space Technology and Science (ISTS). July 2015, Kobe, Japan}, booktitle = {International Symposium on Space Technology and Science (ISTS). July 2015, Kobe, Japan}, year = {2015}, language = {en} } @inproceedings{FateriGebhardtRenftle2015, author = {Fateri, Miranda and Gebhardt, Andreas and Renftle, Georg}, title = {Additive Manufacturing of Drainage Segments for Cooling System of Crucibles Melting Furnaces}, series = {International Conference and Expo on Advanced Ceramics and Composites, (ICACC). January 2015, Florida, USA}, booktitle = {International Conference and Expo on Advanced Ceramics and Composites, (ICACC). January 2015, Florida, USA}, pages = {9 S.}, year = {2015}, abstract = {The cooling process in induction based crucible melting furnaces for Industrial applications is one of the important and challenging factors in production and safety engineering. Accordingly, proper implementation of the cooling system of the furnace using optimum cooling guides and fail-safe features are critical in order to improve the safety of the process. Regarding this, manufacturing of porous material with high electrical isolation for the drainage segments of the cooling channels is examined in this study. Consequently, various geometries with different porosities using glass and ceramic powder are fabricated using Selective Laser Sintering (SLS) process. The manufactured parts are examined in a prototype furnace testing and the feasibility of the SLS manufacturing of parts for this application is discussed.}, language = {en} } @inproceedings{KilicRaatschenAstanehAsletal.2015, author = {Kilic, S. A. and Raatschen, Hans-J{\"u}rgen and Astaneh-Asl, A. and Apaydin, N. M.}, title = {Finite element modeling of the Fatih Sultan Mehmet Suspension Bridge}, series = {Multi-Span Large Bridges - Proceedings of the International Conference on Multi-Span Large Bridges}, booktitle = {Multi-Span Large Bridges - Proceedings of the International Conference on Multi-Span Large Bridges}, publisher = {CRC Press}, address = {Leiden}, isbn = {9781138027572}, pages = {1169 -- 1173}, year = {2015}, language = {en} } @inproceedings{Wollert2015, author = {Wollert, J{\"o}rg}, title = {Wireless systems for machinery safety : Requirements and solutions for wireless real time systems}, series = {16th International Conference on Research and Education in Mechatronics (REM), 2015}, booktitle = {16th International Conference on Research and Education in Mechatronics (REM), 2015}, isbn = {978-3-945728-01-7}, doi = {10.1109/REM.2015.7380377}, pages = {88 -- 91}, year = {2015}, language = {en} } @inproceedings{FateriGebhardtRenftle2015, author = {Fateri, Miranda and Gebhardt, Andreas and Renftle, Georg}, title = {Additive manufacturing of drainage segments for cooling system of crucible melting furnaces}, series = {Advanced Processing and Manufacturing Technologies for Structural and Multifunctional Materials II, International Symposium on Advanced Processing and Manufacturing Technologies for Structural and Multifunctional Materials, ICACC 15, 39th International Conference on Advanced Ceramics and Composites, Daytona Beach, FL, US, Jan 25-30, 2015}, booktitle = {Advanced Processing and Manufacturing Technologies for Structural and Multifunctional Materials II, International Symposium on Advanced Processing and Manufacturing Technologies for Structural and Multifunctional Materials, ICACC 15, 39th International Conference on Advanced Ceramics and Composites, Daytona Beach, FL, US, Jan 25-30, 2015}, publisher = {Wiley}, address = {Hoboken}, issn = {0196-6219}, doi = {10.1002/9781119211662.ch14}, pages = {123 -- 131}, year = {2015}, language = {en} } @article{FateriGebhardtThuemmleretal.2014, author = {Fateri, Miranda and Gebhardt, Andreas and Th{\"u}mmler, Stefan and Thurn, Laura}, title = {Experimental investigation on selective laser melting of glass}, series = {Physics procedia : 8th International Conference on Laser Assisted Net Shape Engineering LANE 2014}, volume = {56 (2014)}, journal = {Physics procedia : 8th International Conference on Laser Assisted Net Shape Engineering LANE 2014}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1875-3892 (E-Journal); 1875-3884 (Print)}, doi = {10.1016/j.phpro.2014.08.118}, pages = {357 -- 364}, year = {2014}, language = {en} } @inproceedings{FateriGebhardt2014, author = {Fateri, Miranda and Gebhardt, Andreas}, title = {Jewelry fabrication via selective laser melting of glass}, series = {ASME 2014 12th Biennial Conference on Engineering Systems Design and Analysis Volume 1: Applied Mechanics; Automotive Systems; Biomedical Biotechnology Engineering; Computational Mechanics; Design; Digital Manufacturing; Education; Marine and Aerospace Applications}, booktitle = {ASME 2014 12th Biennial Conference on Engineering Systems Design and Analysis Volume 1: Applied Mechanics; Automotive Systems; Biomedical Biotechnology Engineering; Computational Mechanics; Design; Digital Manufacturing; Education; Marine and Aerospace Applications}, isbn = {978-0-7918-4583-7}, doi = {10.1115/ESDA2014-20380}, pages = {V001T06A005}, year = {2014}, abstract = {Selective Laser Melting (SLM) is one of the Additive Manufacturing (AM) technologies applicable for producing complex geometries which are typically expensive or difficult to fabricate using conventional methods. This process has been extensively investigated experimentally for various metals and the fabrication process parameters have been established for different applications; however, fabricating 3D glass objects using SLM technology has remained a challenge so far although it could have many applications. This paper presents a summery on various experimental evaluations of a material database incorporating the build parameters of glass powder using the SLM process for jewelry applications.}, language = {en} } @article{HaagZontarSchleupenetal.2014, author = {Haag, S. and Zontar, D. and Schleupen, Josef and M{\"u}ller, T. and Brecher, C.}, title = {Chain of refined perception in self-optimizing assembly of micro-optical systems}, series = {Journal of sensors and sensor systems}, volume = {3}, journal = {Journal of sensors and sensor systems}, number = {1}, publisher = {Copernicus Publ.}, address = {G{\"o}ttingen}, issn = {2194-878X}, doi = {10.5194/jsss-3-87-2014}, pages = {87 -- 95}, year = {2014}, abstract = {Today, the assembly of laser systems requires a large share of manual operations due to its complexity regarding the optimal alignment of optics. Although the feasibility of automated alignment of laser optics has been shown in research labs, the development effort for the automation of assembly does not meet economic requirements - especially for low-volume laser production. This paper presents a model-based and sensor-integrated assembly execution approach for flexible assembly cells consisting of a macro-positioner covering a large workspace and a compact micromanipulator with camera attached to the positioner. In order to make full use of available models from computer-aided design (CAD) and optical simulation, sensor systems at different levels of accuracy are used for matching perceived information with model data. This approach is named "chain of refined perception", and it allows for automated planning of complex assembly tasks along all major phases of assembly such as collision-free path planning, part feeding, and active and passive alignment. The focus of the paper is put on the in-process image-based metrology and information extraction used for identifying and calibrating local coordinate systems as well as the exploitation of that information for a part feeding process for micro-optics. Results will be presented regarding the processes of automated calibration of the robot camera as well as the local coordinate systems of part feeding area and robot base.}, language = {en} } @article{GebhardtFateri2013, author = {Gebhardt, Andreas and Fateri, Miranda}, title = {3D printing and its applications}, series = {RTejournal - Forum f{\"u}r Rapid Technologie}, volume = {10}, journal = {RTejournal - Forum f{\"u}r Rapid Technologie}, number = {1}, publisher = {Fachhochschule Aachen}, address = {Aachen}, issn = {1614-0923}, url = {http://nbn-resolving.de/urn:nbn:de:0009-2-35626}, year = {2013}, abstract = {Eine zunehmende Anzahl von Artikeln in Publikumszeitschriften und Journalen r{\"u}ckt die direkte Herstellung von Bauteilen und Figuren immer mehr in das Bewusstsein einer breiten {\"O}ffentlichkeit. Leider ergibt sich nur selten ein einigermaßen vollst{\"a}ndiges Bild davon, wie und in welchen Lebensbereichen diese Techniken unseren Alltag ver{\"a}ndern werden. Das liegt auch daran, dass die meisten Artikel sehr technisch gepr{\"a}gt sind und sich nur punktuell auf Beispiele st{\"u}tzen. Dieser Beitrag geht von den Bed{\"u}rfnissen der Menschen aus, wie sie z.B. in der Maslow'schen Bed{\"u}rfnispyramide strukturiert dargestellt sind und unterstreicht dadurch, dass 3D Printing (oder Additive Manufacturing resp. Rapid Prototyping) bereits alle Lebensbereiche erfasst hat und im Begriff ist, viele davon zu revolutionieren.}, language = {en} } @article{RamazaniLiMukherjeeetal.2013, author = {Ramazani, Ali and Li, Yang and Mukherjee, Krishnendu and Prahl, Ulrich and Bleck, Wolfgang and Abdurakhmanov, Aydemir and Schleser, Markus and Reisgen, Uwe}, title = {Microstructure evolution simulation in hot rolled DP600 steel during gas metal arc welding}, series = {Computational materials science}, volume = {Vol. 68}, journal = {Computational materials science}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1879-0801 (E-Book); 0927-0256 (Print)}, pages = {107 -- 116}, year = {2013}, language = {en} } @inproceedings{StarkeKunkelHahn2013, author = {Starke, G{\"u}nther and Kunkel, Thomas and Hahn, Daniel}, title = {Flexible collaboration and control of heterogeneous mechatronic devices and systems by means of an event-driven, SOA-based automation concept}, series = {2013 IEEE International Conference on Industrial Technologies (ICIT-13)}, booktitle = {2013 IEEE International Conference on Industrial Technologies (ICIT-13)}, publisher = {IEEE}, address = {Piscataway, NJ}, organization = {International Conference on Industrial Technologies <2013, Cape Town>}, isbn = {978-1-4673-4567-5 ; 978-1-4673-4569-9}, pages = {1982 -- 1987}, year = {2013}, language = {en} } @inproceedings{FateriGebhardtKhosravi2013, author = {Fateri, Miranda and Gebhardt, Andreas and Khosravi, Maziar}, title = {Experimental investigation of selective laser melting of lunar regolith for in-situ applications}, series = {ASME 2013 International Mechanical Engineering Congress and Exposition : San Diego, California, USA, November 15-21, 2013. Vol. 2A: Advanced manufacturing}, booktitle = {ASME 2013 International Mechanical Engineering Congress and Exposition : San Diego, California, USA, November 15-21, 2013. Vol. 2A: Advanced manufacturing}, publisher = {ASME}, organization = {American Society of Mechanical Engineers}, isbn = {978-0-7918-5618-5}, pages = {V02AT02A008}, year = {2013}, language = {en} } @phdthesis{Pfaff2013, author = {Pfaff, Raphael}, title = {Evaluation and extension of the potential for application of the behavioural framework to practical engineering problems}, pages = {XVI, 231 S.}, year = {2013}, language = {en} } @article{FateriHoetterGebhardt2012, author = {Fateri, Miranda and H{\"o}tter, Jan-Steffen and Gebhardt, Andreas}, title = {Experimental and Theoretical Investigation of Buckling Deformation of Fabricated Objects by Selective Laser Melting}, series = {Physics Procedia}, volume = {39}, journal = {Physics Procedia}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1875-3892}, doi = {10.1016/j.phpro.2012.10.062}, pages = {464 -- 470}, year = {2012}, abstract = {Although Selective Laser Melting (SLM) process is an innovative manufacturing method, there are challenges such as inferior mechanical properties of fabricated objects. Regarding this, buckling deformation which is caused by thermal stress is one of the undesired mechanical properties which must be alleviated. As buckling deformation is more observable in hard to process materials, silver is selected to be studied theoretically and experimentally for this paper. Different scanning strategies are utilized and a Finite Element Method (FEM) is applied to calculate the temperature gradient in order to determine its effect on the buckling deformation of the objects from experiments.}, language = {en} } @inproceedings{FerreinKallweitLautermann2012, author = {Ferrein, Alexander and Kallweit, Stephan and Lautermann, Mark}, title = {Towards an autonomous pilot system for a tunnel boring machine}, series = {5th Robotics and Mechatronics Conference of South Africa (ROBMECH) : 26 - 27 November 2012 ; CSIR International Conference Centre Gauteng South Africa}, booktitle = {5th Robotics and Mechatronics Conference of South Africa (ROBMECH) : 26 - 27 November 2012 ; CSIR International Conference Centre Gauteng South Africa}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-4673-5183-6}, year = {2012}, language = {en} } @inproceedings{ReisgenSchleserSchoeneetal.2012, author = {Reisgen, Uwe and Schleser, Markus and Schoene, Jens and Hegger, Josef and Gallwoszus, J{\"o}rg and Feldmann, Markus and Kopp, Maik and G{\"u}ndel, Max}, title = {Investigation on bond mechanisms of innovative small-scale shear connectors between steel and concrete}, series = {Bond in concrete 2012. Vol. 2. Bond in new materials and under severe conditions}, booktitle = {Bond in concrete 2012. Vol. 2. Bond in new materials and under severe conditions}, editor = {Cairns, John W.}, publisher = {Publisher creations}, address = {Manerbio, Brescia}, isbn = {978-88-907078-3-4}, pages = {893 -- 898}, year = {2012}, language = {en} } @article{ReisgenSchleserMokrovetal.2012, author = {Reisgen, Uwe and Schleser, Markus and Mokrov, Oleg and Ahmed, Essam}, title = {Statistical modeling of laser welding of DP/TRIP steel sheets}, series = {Optics and laser technology}, volume = {44}, journal = {Optics and laser technology}, number = {1}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1879-2545 (E-Journal); 0030-3992 (Print); 0308-4280 (Print)}, doi = {10.1016/j.optlastec.2011.05.025}, pages = {92 -- 101}, year = {2012}, abstract = {In this research work, a statistical analysis of the CO2 laser beam welding of dual phase (DP600)/transformation induced plasticity (TRIP700) steel sheets was done using response surface methodology. The analysis considered the effect of laser power (2-2.2 kW), welding speed (40-50 mm/s) and focus position (-1 to 0 mm) on the heat input, the weld bead geometry, uniaxial tensile strength, formability limited dome height and welding operation cost. The experimental design was based on Box-Behnken design using linear and quadratic polynomial equations for predicting the mathematical models. The results indicate that the proposed models predict the responses adequately within the limits of welding parameters being used and the welding speed is the most significant parameter during the welding process.}, language = {en} } @article{ReisgenSchleserMokrovetal.2012, author = {Reisgen, Uwe and Schleser, Markus and Mokrov, Oleg and Ahmed, Essam}, title = {Optimization of laser welding of DP/TRIP steel sheets using statistical approach}, series = {Optics and laser technology}, volume = {44}, journal = {Optics and laser technology}, number = {1}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1879-2545 (E-Journal); 0030-3992 (Print); 0308-4280 (Print)}, doi = {10.1016/j.optlastec.2011.06.028}, pages = {255 -- 262}, year = {2012}, abstract = {Generally, the quality of a weld joint is directly influenced by the welding input parameter settings. Selection of proper process parameters is important to obtain the desired weld bead profile and quality. In this research work, numerical and graphical optimization techniques of the CO2 laser beam welding of dual phase (DP600)/transformation induced plasticity (TRIP700) steel sheets were carried out using response surface methodology (RSM) based on Box-Behnken design. The procedure was established to improve the weld quality, increase the productivity and minimize the total operation cost by considering the welding parameters range of laser power (2-2.2 kW), welding speed (40-50 mm/s) and focus position (-1 to 0 mm). It was found that, RSM can be considered as a powerful tool in experimental welding optimization, even when the experimenter does not have a model for the process. Strong, efficient and low cost weld joints could be achieved using the optimum welding conditions.}, language = {en} } @article{ReisgenOlschokJakobsetal.2012, author = {Reisgen, Uwe and Olschok, Simon and Jakobs, Stefan and Schleser, Markus and Mokrov, Oleg and Rossiter, Eduardo}, title = {Laser beam submerged arc hybrid welding}, series = {Physics procedia}, volume = {39}, journal = {Physics procedia}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1875-3892}, doi = {10.1016/j.phpro.2012.10.016}, pages = {75 -- 83}, year = {2012}, abstract = {The laser beam-submerged arc hybrid welding method originates from the knowledge that, with increasing penetration depth, the laser beam process has a tendency to pore formation in the lower weld regions. The coupling with the energy-efficient submerged-arc process improves degassing and reduces the tendency to pore formation. The high deposition rate of the SA process in combination with the laser beam process offers, providing the appropriate choice of weld preparation, the possibility of welding plates with a thickness larger than 20° mm in a single pass, and also of welding thicker plates with the double-sided single pass technique.}, language = {en} } @article{ReisgenSchleserAbdurakhmanovetal.2012, author = {Reisgen, Uwe and Schleser, Markus and Abdurakhmanov, Aydemir and Gumenyuk, Andrey}, title = {Measuring of plasma properties induced by non-vacuum electron beam welding}, series = {Physics of plasma}, volume = {19}, journal = {Physics of plasma}, number = {1}, publisher = {AIP Publishing}, address = {Melville, NY}, issn = {1089-7674 (E-Journal); 1070-664X (Print)}, doi = {10.1063/1.3675874}, pages = {1 -- 7}, year = {2012}, abstract = {Electron beam plasma measurement was realised by means of DIABEAM system invented by ISF RWTH Aachen. The Langmuir probe method is used for measurement. The relative simplicity of the method and the possibility of dispersion of high power on the probe allow its application for the investigation of high-power electron beams. The key element of the method is a rotating thin tungsten wire, which intersects the beam transversely on its axis and collects part of the current by itself. The signals, which are registered in the DIABEAM as a voltage, were taken in the form of amplitude. The conversion of the probe current into the distribution along the beam radius was realised using the Abel's method. A voltage-current characteristic was built for the beam current. The local electron density as well as the electron temperature, the floating potential and the plasma potential were measured and calculated by means of this characteristic.}, language = {en} } @inproceedings{HartmannKallweitFeldusenetal.2012, author = {Hartmann, Axel and Kallweit, Stephan and Feldusen, Antje and Schr{\"o}der, Wolfgang}, title = {Detection of upstream propagating sound waves at buffet flow using high-speed PIV}, pages = {14 S. : graph. Darst.}, year = {2012}, language = {en} } @inproceedings{QuadfliegSchoeneSchleseretal.2012, author = {Quadflieg, Till and Schoene, Jens and Schleser, Markus and Jockenh{\"o}vel, Stefan and Reisgen, Uwe and Gries, Thomas}, title = {Shear connectors for hybrid joints of metal and FRP}, series = {Diversity in composites : conference proceedings : Composites Australia and CRC-ACS 2012 conference}, booktitle = {Diversity in composites : conference proceedings : Composites Australia and CRC-ACS 2012 conference}, editor = {Heslehurst, Rikard Benton}, publisher = {Composites Australia}, address = {Hawthorne}, isbn = {978-0-9873285-0-2}, pages = {[152] -- [160]}, year = {2012}, language = {en} } @article{ReisgenSchleserMokrovetal.2012, author = {Reisgen, Uwe and Schleser, Markus and Mokrov, Oleg and Zabirov, Alexander and F{\"u}ssel, Uwe and Schnick, Michael and Hertel, Martin and Jaeckel, Sebastian}, title = {Modelling and visualisation of the GMA process}, series = {Welding and Cutting}, volume = {11}, journal = {Welding and Cutting}, number = {4}, publisher = {DVS Verlag}, address = {D{\"u}sseldorf}, issn = {1612-3433}, pages = {242 -- 249}, year = {2012}, language = {en} } @inproceedings{ReisgenSchleserAbdurakhmanovetal.2012, author = {Reisgen, Uwe and Schleser, Markus and Abdurakhmanov, Aydemir and Gumenyuk, Andrej}, title = {Application of electron beam welding to fabrication of steel-aluminium dissimilar joint}, series = {Beam technologies \& laser application : proceedings of the VII international conference, Saint Petersburg, Sept. 18-21, 2012}, booktitle = {Beam technologies \& laser application : proceedings of the VII international conference, Saint Petersburg, Sept. 18-21, 2012}, publisher = {Publ. House}, address = {Saint Petersburg}, pages = {265 -- 279}, year = {2012}, language = {en} } @article{HoetterFateriGebhardt2012, author = {H{\"o}tter, Jan-Steffen and Fateri, Miranda and Gebhardt, Andreas}, title = {Selective laser melting of metals: desktop machines open up new chances even for small companies}, series = {Advanced materials research}, volume = {622-623}, journal = {Advanced materials research}, publisher = {Trans Tech Publ.}, address = {Baech}, issn = {1662-8985 (E-Journal); 1022-6680 (Print)}, doi = {10.4028/www.scientific.net/AMR.622-623.461}, pages = {461 -- 465}, year = {2012}, abstract = {Additive manufacturing (AM) of metal parts by using Selective Laser Melting (SLM) has become a powerful tool mostly in the area of automotive, aerospace engineering and others. Especially in the field of dentistry, jewelry and related branches that require individualized or even one-of-a-kind products, the direct digital manufacturing process opens up new ways of design and manufacturing. In these fields, mostly small and medium sized businesses (SME) are operating which do not have sufficient human and economic resources to invest in this technology. But to stay competitive, the application of AM can be regarded as a necessity. In this situation a new desktop machine (Realizer SLM 50) was introduced that cost about 1/3 of a shop floor SLM machine and promises small quality parts. To find out whether the machine really is an alternative for SMEs the University of Applied Science, Aachen, Germany, designed, build and optimized typical parts from the dentistry and the jewelry branches using CoCr and silver material, the latter being new with this application. The paper describes the SLM procedure and how to find and optimize the most important parameters. The test is accompanied by digital simulation in order to verify the build parameters and to plan future builds. The procedure is shown as well as the resulting parts made from CoCr and silver material.}, language = {en} } @article{LeidingerNoistenWollert2012, author = {Leidinger, Rafael and Noisten, Thomas and Wollert, J{\"o}rg}, title = {Realtime automation networks in moVing industrial environments}, series = {Journal of systemics, cybernetics and informatics}, volume = {Vol. 10}, journal = {Journal of systemics, cybernetics and informatics}, number = {Iss. 2}, publisher = {IIIC}, address = {Orlando}, issn = {1690-4532}, pages = {52 -- 56}, year = {2012}, abstract = {The radio-based wireless data communication has made the realization of new technical solutions possible in many fields of the automation technology (AT). For about ten years, a constant disproportionate growth of wireless technologies can be observed in the automation technology. However, it shows that especially for the AT, conventional technologies of office automation are unsuitable and/or not manageable. The employment of mobile services in the industrial automation technology has the potential of significant cost and time savings. This leads to an increased productivity in various fields of the AT, for example in the factory and process automation or in production logistics. In this paper technologies and solutions for an automation-suited supply of mobile wireless services will be introduced under the criteria of real time suitability, IT-security and service orientation. Emphasis will be put on the investigation and development of wireless convergence layers for different radio technologies, on the central provision of support services for an easy-to-use, central, backup enabled management of combined wired / wireless networks and on the study on integrability in a Profinet real-time Ethernet network.}, language = {en} }