TY  - JOUR
A1  - Starke, Günther
T1  - Welding in the century of information technology. Session 1
JF  - Welding in the World. 34 (1994), H. 9
Y1  - 1994
SN  - 0043-2288
SP  - 1
EP  - 20
ER  - 
TY  - JOUR
A1  - Reisgen, Uwe
A1  - Schleser, Markus
A1  - Mokrov, Oleg
A1  - Zabirov, Alexander
T1  - Virtual welding equipment for simulation of GMAW processes with integration of power source regulation
JF  - Frontiers of materials science
Y1  - 2011
SN  - 2095-0268 (E-Journal); 2095-025X (Print)
VL  - Vol. 5
IS  - Iss. 2
SP  - 79
EP  - 89
PB  - Springer
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Haselgruber, Nikolaus
A1  - Mautner, Karin
A1  - Thiele, Jan
T1  - Usage Space Analysis for Reliability Testing
JF  - Quality and Reliability Engineering International
N2  - During the development process of a complex technical product, one widely used and important technique is accelerated testing where the applied stress on a component is chosen to exceed the reference stress, i.e. the stress encountered in field operation, in order to reduce the time to failure. For that, the reference stress has to be known. Since a complex technical product may fail regarding numerous failure modes, stress in general is highly dimensional rather than scalar. In addition, customers use their products individually, i.e. field operation should be described by a distribution rather than by one scalar stress value. In this paper, a way to span the customer usage space is shown. It allows the identification of worst case reference stress profiles in significantly reduced dimensions with minimal loss of information. The application example shows that even for a complex product like a combustion engine, stress information can be compressed significantly. With low measurement effort it turned out that only three reference stress cycles were sufficient to cover a broad range of customer stress variety.
Y1  - 2010
U6  - http://dx.doi.org/10.1002/qre.1155
SN  - 1099-1638
N1  - Special Issue: Business and Industrial Statistics: Developments and Industrial Practices in Quality and Reliability
VL  - 26
IS  - 8
SP  - 877
EP  - 885
PB  - Wiley
CY  - New York
ER  - 
TY  - JOUR
A1  - Reisgen, Uwe
A1  - Schleser, Markus
A1  - Mokrov, Oleg
A1  - Ahmed, Essam
T1  - Uni- and bi-axial deformation behavior of laser welded advanced high strength steel sheets
JF  - Journal of materials processing technology
N2  - Bead-on-plate butt joints of 2.5 mm hot rolled DP600/DP600 and 1.2 mm cold rolled TRIP700/TRIP700 steel sheets were performed using 6 kW CO2 laser beam welding. The welding speed ranged from 1.5 to 3.0 and from 2.1 to 3.9 m/min in DP/DP and TRIP/TRIP steel weldments respectively. A top surface helium gas was used as a shielding gas at a flow rate of 20 l/min. Metallographic examinations and transverse tensile testing (DIN EN 895: 1995) were carried out to characterize the weldments. The formability of base metals and weldments were investigated by standard Erichsen test (DIN EN ISO 20482). It was found that the uniaxial plastic behavior of both DP600 and TRIP700 base metals was in agreement with Swift and modified Mecking–Kocks models respectively. In a perpendicular tensile test to the weld line, all specimens were fractured at the base metal however the strengths were somewhat higher than those of base metal. There was a significant reduction in formability caused by welding of both DP/DP and TRIP/TRIP steel weldments and the formability has been improved with the increase of the welding speed.
Y1  - 2010
U6  - http://dx.doi.org/http10.1016/j.jmatprotec.2010.08.003
SN  - 0924-0136
VL  - 210
IS  - 15
SP  - 2188
EP  - 2196
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Bucur, Alexandru
A1  - Lazarescu, Lucian
A1  - Pop, Grigore Marian
A1  - Achimas, Gheorghe
A1  - Gebhardt, Andreas
T1  - Tribological performance of biodegradable lubricants under different surface roughness of tools
JF  - Academic Journal of Manufacturing Engineering
Y1  - 2019
SN  - 1583-7904
VL  - 17
IS  - 1
SP  - 172
EP  - 178
ER  - 
TY  - JOUR
A1  - Kallweit, Stephan
A1  - Kaminsky, R.
A1  - Rossi, M.
A1  - Morbiducci, U.
T1  - Time resolved PIV technique for high temporal resolution measurements of prosthetic heart valves fluid dynamics / Kaminsky, R. ; Rossi, M. ; Morbiducci, U. ; Scalise, L. ; Catellini, P. ; Kallweit, S. ; Verdonck, P. ; Grigioni, M.
JF  - The International Journal of Artificial Organs. 28 (2005), H. 9
Y1  - 2005
SN  - 1724-6040
N1  - Abstracts: XXXII Annual ESAO Congress, 5-8 October 2005, Bologna - Italy
SP  - 946
ER  - 
TY  - JOUR
A1  - Kallweit, Stephan
A1  - Vanlanduit, S.
A1  - Vanherzeele, J.
A1  - Brouns, M.
T1  - Time resolved PIV reconstruction of periodic flows / Vanlanduit, S. ; Vanherzeele, J. ; Kallweit, S. ; Brouns, M. ; Guillaume, P.
JF  - PIV'07, 7th International Symposium on Particle Image Velocimetry, Roma, IT, Sep 11-14, 2007
Y1  - 2007
N1  - PIV, Internional Symposium on Particle Image Velocimetry, 7 ; Datei: Vanlanduit.pdf
SP  - 1
EP  - 14
ER  - 
TY  - JOUR
A1  - Kämper, Klaus-Peter
A1  - Schmitt, W.
A1  - Wesner, D. A.
A1  - Güntherodt, G.
T1  - Thickness dependence of the spin- and angle-resolved photoemission of ultrathin, epitaxial Ni(111)/W(110) layers
JF  - Applied Physics A: Materials Science and Processing. 49 (1989), H. 6
Y1  - 1989
SN  - 1432-0630
SP  - 573
EP  - 578
ER  - 
TY  - JOUR
A1  - Kämper, Klaus-Peter
A1  - Schmitt, W.
A1  - Güntherodt, G.
T1  - Thickness dependence of the electronic structure of ultrathin, epitaxial Ni(111)/W(110) layers.
JF  - Physical Review B. 38 (1988), H. 14
Y1  - 1988
SN  - 1095-3795
SP  - 9451
EP  - 9456
ER  - 
TY  - JOUR
A1  - Abdel-Latif, Lotfie Ahmed
A1  - Peeken, Heinz
A1  - Benner, Joachim
T1  - Thermohydrodynamic analysis of thrust-bearing with circular pads running on bubbly oil (BTHD-theory)
JF  - Journal of tribology
Y1  - 1985
SN  - 0742-4787
SN  - 1528-8897
VL  - 107
IS  - 4
SP  - 527
EP  - 537
ER  - 
TY  - JOUR
A1  - Wang, Mao
A1  - Anik, Sabri
A1  - Frohberg, Martin G.
T1  - Thermodynamics of oxygen in the lead-antimony system at 1173 K
JF  - Erzmetall : Rohstoffgewinnung, Verarbeitung, Recycling, Umwelttechnik
Y1  - 1987
SN  - 0044-2658
VL  - 40
IS  - 6
SP  - 316
EP  - 319
ER  - 
TY  - JOUR
A1  - Anik, Sabri
A1  - Frohberg, Martin G.
T1  - Thermodynamics of oxygen in the copper-antimony system at 1473K
JF  - Erzmetall : Rohstoffgewinnung, Verarbeitung, Recycling, Umwelttechnik
Y1  - 1988
SN  - 0044-2658
VL  - 41
IS  - 10
SP  - 498
EP  - 501
ER  - 
TY  - JOUR
A1  - Anik, Sabri
A1  - Frohberg, Martin G.
T1  - Thermodynamics and solubility of oxygen in liquid copper-lead alloys at 1200°C from E.M.F. measurements
JF  - Berichte der Bunsengesellschaft für physikalische Chemie
Y1  - 1984
SN  - 0940-483X
SN  - 0005-9021
VL  - 88
IS  - 8
SP  - 707
EP  - 710
ER  - 
TY  - JOUR
A1  - Anik, Sabri
A1  - Frohberg, Martin G.
T1  - Thermodynamics and solubility of oxygen in liquid bismuth-lead and bismuth-antimony alloys
JF  - Berichte der Bunsengesellschaft für physikalische Chemie
Y1  - 1987
SN  - 0940-483X
SN  - 0005-9021
VL  - 91
IS  - 7
SP  - 790
EP  - 794
ER  - 
TY  - JOUR
A1  - Frohberg, Martin G.
A1  - Anik, Sabri
T1  - Thermodynamic relations between component activities and gas solubilities in binary metallic systems
JF  - Berichte der Bunsengesellschaft für physikalische Chemie
Y1  - 1985
SN  - 0940-483X
SN  - 0005-9021
VL  - 89
IS  - 2
SP  - 130
EP  - 134
ER  - 
TY  - JOUR
A1  - Anik, Sabri
A1  - Kapoor, Madan Lal
A1  - Frohberg, Martin G.
T1  - Thermodynamic behaviour of oxygen in molten substitutional alloy solvents
JF  - Zeitschrift für Metallkunde
Y1  - 1983
SN  - 0044-3093
VL  - 74
IS  - 1
SP  - 53
EP  - 58
ER  - 
TY  - JOUR
A1  - Kämper, Klaus-Peter
A1  - Picard, Antoni
A1  - Brill, Manfred
A1  - Cassel, Detlef (u.a.)
T1  - The Virtual Cleanroom – a new tool in teaching MST process technologies
JF  - mst news International newsletter on micro - nano Integration (2003)
Y1  - 2003
SN  - 0948-3128
SP  - 35
EP  - 36
ER  - 
TY  - JOUR
A1  - Kämper, Klaus-Peter
A1  - Picard, Antoni
A1  - Brill, Manfred
A1  - Cassel, Detlev
A1  - Jentsch, Andreas
A1  - Merten, Sabine
A1  - Rollwa, Markus
T1  - The Virtual Clean Room - a new tool in teaching MST process technologies
N2  - The Virtual Clean Room - a new tool in teaching MST process technologies University education in high-technology fields like MST is not complete without intensive laboratory sessions. Students cannot fully grasp the complexity and the special problems related to the manufacturing of microsystems without a thorough hands-on experience in a MST clean room.
KW  - Virtuelle Maschine
KW  - VM
KW  - Mikrosystemtechnik
KW  - MST
KW  - virtual clean room
Y1  - 2003
ER  - 
TY  - JOUR
A1  - Hanrath, Wilhelm
A1  - Plesken, Wilhelm
T1  - The lattices of six-dimensional euclidean space
JF  - Mathematics of computation. 43 (1984), H. 168
Y1  - 1984
SN  - 0025-5718
SP  - 573
EP  - 587
ER  - 
TY  - JOUR
A1  - Panc, Nicolae
A1  - Contiu, Glad
A1  - Bocanet, Vlad
A1  - Thurn, Laura
A1  - Sabau, Emilia
T1  - The influence of cutting technology on surface wear hardness
JF  - Academic Journal of Manufacturing Engineering
Y1  - 2019
SN  - 1583-7904
VL  - 17
IS  - 3
SP  - 205
EP  - 210
ER  - 
TY  - JOUR
A1  - Kämper, Klaus-Peter
A1  - Schmitt, W.
A1  - Güntherodt, G.
T1  - The influence of adsorbates on the spin-resolved photoemission of Ni(110). Schmitt, W.; Kämper, K.-P.; Güntherodt, G.
JF  - Surface Science. 189/190 (1987)
Y1  - 1987
SN  - 0039-6028
N1  - Proceedings of the Ninth European Conference on Surface Science
SP  - 741
EP  - 507
ER  - 
TY  - JOUR
A1  - Frohberg, Martin G.
A1  - Anik, Sabri
T1  - The calculation of component activities of binary metallic melts from their gas solubilities
JF  - Zeitschrift für Metallkunde
Y1  - 1985
SN  - 0044-3093
VL  - 76
IS  - 2
SP  - 135
EP  - 137
ER  - 
TY  - JOUR
A1  - Frohberg, Martin G.
A1  - Anik, Sabri
T1  - The application of a quadi-chemical lattice model to binary metallic solvents containing oxygen in higher concentrations
JF  - Zeitschrift für Metallkunde
Y1  - 1983
SN  - 0044-3093
VL  - 74
IS  - 10
SP  - 665
EP  - 666
ER  - 
TY  - JOUR
A1  - Kämper, Klaus-Peter
A1  - Schmitt, W.
A1  - Güntherodt, G.
T1  - Temperature dependence of the exchange splitting of Ni along the -L line
JF  - Journal de physique. 49 (1988), H. 12. Supplement, Colloque C8
Y1  - 1988
N1  - Proceedings of the International conference on Magnetism. Part 1. ICM 88, Paris, France, Juli 25-29, 1988
SP  - 39
EP  - 40
ER  - 
TY  - JOUR
A1  - Kämper, Klaus-Peter
A1  - Schmitt, W.
A1  - Güntherodt, G.
T1  - Temperature and wave-vector dependence of the spin-split band structure of Ni(111) along the Γ-L line
JF  - Physical Review B. 42 (1990), H. 16
Y1  - 1990
SN  - 1095-3795
SP  - 10696
EP  - 10705
ER  - 
TY  - JOUR
A1  - Klocke, Martina
T1  - Study Units in the CIM-Oriented Study Factory
JF  - Qualification for Computer-Integrated Manufacturing. Hrsg.: Felix Rauner
Y1  - 1995
SN  - 3-540-19971-3
SP  - 38
EP  - 51
PB  - Springer
CY  - Berlin [u.a.]
ER  - 
TY  - JOUR
A1  - Reisgen, Uwe
A1  - Schleser, Markus
A1  - Mokrov, Oleg
A1  - Ahmed, Essam
T1  - Statistical modeling of laser welding of DP/TRIP steel sheets
JF  - Optics and laser technology
N2  - 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.
Y1  - 2012
U6  - http://dx.doi.org/10.1016/j.optlastec.2011.05.025
SN  - 1879-2545 (E-Journal); 0030-3992 (Print); 0308-4280 (Print)
VL  - 44
IS  - 1
SP  - 92
EP  - 101
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Kunkel, Maximilian Hugo
A1  - Gebhardt, Andreas
A1  - Mpofu, Khumbaulani
A1  - Kallweit, Stephan
T1  - Statistical assessment of mechanical properties of selective laser melted specimens of stainless steel
JF  - The International Journal of Advanced Manufacturing Technology
N2  - The rail business is challenged by long product life cycles and a broad spectrum of assembly groups and single parts. When spare part obsolescence occurs, quick solutions are needed. A reproduction of obsolete parts is often connected to long waiting times and minimum lot quantities that need to be purchased and stored. Spare part storage is therefore challenged by growing stocks, bound capital and issues of part ageing. A possible solution could be a virtual storage of spare parts which will be 3D printed through additive manufacturing technologies in case of sudden demand. As mechanical properties of additive manufactured parts are neither guaranteed by machine manufacturers nor by service providers, the utilization of this relatively young technology is impeded and research is required to address these issues. This paper presents an examination of mechanical properties of specimens manufactured from stainless steel through the selective laser melting (SLM) process. The specimens were produced in multiple batches. This paper interrogates the question if the test results follow a normal distribution pattern and if mechanical property predictions can be made. The results will be put opposite existing threshold values provided as the industrial standard. Furthermore, probability predictions will be made in order to examine the potential of the SLM process to maintain state-of-the-art mechanical property requirements.
Y1  - 2018
U6  - http://dx.doi.org/10.1007/s00170-018-2040-8
SN  - 0268-3768
VL  - 98
IS  - 5-8
SP  - 1409
EP  - 1431
PB  - Springer
CY  - London
ER  - 
TY  - JOUR
A1  - Kämper, Klaus-Peter
A1  - Kurzawa, R.
A1  - Schmitt, W.
A1  - Güntherodt, G.
T1  - Spin-resolved photoemission study of in situ grown epitaxial Fe layers on W(110). Kurzawa, R.; Kämper, K.-P.; Schmitt, W.; Güntherodt, G.
JF  - Solid State Communications. 60 (1986), H. 10
Y1  - 1986
SN  - 0038-1098
SP  - 777
EP  - 780
ER  - 
TY  - JOUR
A1  - Kämper, Klaus-Peter
A1  - Abraham, D. L.
A1  - Hopster, H.
T1  - Spin-polarized electron-energy-loss spectroscopy on epitaxial fcc Co layers on Cu(001)
JF  - Physical Review B. 45 (1992), H. 24
Y1  - 1992
SN  - 1095-3795
SP  - 14335
EP  - 14346
ER  - 
TY  - JOUR
A1  - Kämper, Klaus-Peter
A1  - Pappas, D. P.
A1  - Miller, B. P.
A1  - Hopster, H.
T1  - Spin-dependent electron attenuation by transmission through thin ferromagnetic films . Pappas, D. P.; Kämper,K.-P.; Miller, B. P.; Hopster, H.; Fowler, D. E.; Brundle, C. R.; Luntz, A. C.; Shen, Z.-X.
JF  - Physical Review Letters. 66 (1991), H. 4
Y1  - 1991
SN  - 1079-7114
SP  - 504
EP  - 507
ER  - 
TY  - JOUR
A1  - Kallweit, Stephan
A1  - Dues, M. W.
A1  - Siekmann, H. E.
T1  - Spectral Analysis of Pressure Fluctuations and Velocity Fields as Investigated on Propeller Pumps / Dues, M. W. ; Kallweit, S. D. ; Siekmann, H. E.
JF  - Preprints : Fifth International Symposium on Transport Phenomena and Dynamics of Rotating Machinery (ISROMAC-5) : May 8 - 11, 1994, Maui Marriott Hotel, Kaanapali, Maui, Hawaii, U.S.A / sponsored by Pacific Center of Thermal-Fluids Engineering. [W.-J. Yang, chairman] / Vol. B.
Y1  - 1994
N1  - International Symposium on Transport Phenomena and Dynamics of Rotating Machinery 5, 1994, Kaanapali, Hawaii
SP  - 98
EP  - 112
ER  - 
TY  - JOUR
A1  - Kämper, Klaus-Peter
A1  - Döpper, J.
A1  - Ehrfeld, W.
A1  - Hagemann, B.
T1  - Simulation supported design of LIGA Microsystems. Kämper, K.-P.; Döpper, J.; Ehrfeld, W.; Hagemann, B.; Hill, S.D.J.; Lehr, H.
JF  - Simulation and design of microsystems and microstructures : [... contains the papers presented at the First International Conference on the Simulation and Design of Microsystems and Microstructures, MicroSIM '95, which was held in Southampton, UK, in September 1995] / [organised by: Wessex Institute of Technology, UK]. Ed.: R. A. Adey
Y1  - 1995
SN  - 1-85312-390-0
SP  - 3
EP  - 10
PB  - Computational Mechanics Publ.
CY  - Southampton [u.a.]
ER  - 
TY  - JOUR
A1  - Reisgen, Uwe
A1  - Schleser, Markus
A1  - Mokrov, Oleg
A1  - Ahmed, Essam
T1  - Shielding gas influences on laser weldability of tailored blanks of advanced automotive steels
JF  - Applied surface science
N2  - The effects of shielding gas types and flow rates on CO2 laser weldability of DP600/TRIP700 steel sheets were studied in this work. The evaluated shielding gases were helium (He), argon (Ar) and different mixtures of He and Ar. Weld penetration, tensile strength and formability (Erichsen test) of laser welds were found to be strongly dependent upon the shielding gas types. The ability of shielding gas in removing plasma plume and thus increasing weld penetration is believed to be closely related to ionization potential and atomic weight which determine the period of plasma formation and disappearance. It was found that the higher helium shielding gas flow rate, the deeper weld penetration and the lower weld width.
Y1  - 2010
U6  - http://dx.doi.org/10.1016/j.apsusc.2010.08.042
SN  - 0169-4332 (E-Journal); 0169-4332 (Print)
VL  - 257
IS  - 5
SP  - 1401
EP  - 1406
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Kämper, Klaus-Peter
A1  - Berg, U.
A1  - Begemann, M.
A1  - Hagemann, B. (u.a.)
T1  - Series production and testing of a micro motor. Serienfertigung und Prüfung eines Mikromotors
JF  - Actuator 98 : 6th International Conference on New Actuators ; 17 - 19 June, 1998, Bremen, Germany ; conference proceedings / ed.: Hubert Borgmann ...
Y1  - 1998
SN  - 3-933339-00-6
N1  - Konferenz-Einzelbericht: ACTUATOR, Internat. Conf. on New Actuators
SP  - 552
EP  - 555
PB  - Messe Bremen
CY  - Bremen
ER  - 
TY  - JOUR
A1  - Rieper, Harald
A1  - Gebhardt, Andreas
A1  - Stucker, Brent
T1  - Selective Laser Melting of the Eutectic Silver-Copper Alloy Ag 28 wt % Cu
JF  - RTejournal - Forum für Rapid Technologie
N2  - 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.
KW  - SLM
KW  - Response Surface Method
KW  - Porositat
KW  - Eutectic Silver Copper alloy
KW  - Additive Manufacturing
Y1  - 2016
U6  - http://nbn-resolving.de/urn/resolver.pl?nbn:de:0009-2-44141
SN  - 1614-0923
VL  - 13
ER  - 
TY  - JOUR
A1  - Fateri, Miranda
A1  - Gebhardt, Andreas
T1  - Selective Laser Melting of Soda-Lime Glass Powder
JF  - International Journal of Applied Ceramic Technology
Y1  - 2015
U6  - http://dx.doi.org/10.1111/ijac.12338
SN  - 1744-7402
VL  - 12
IS  - 1
SP  - 53
EP  - 61
PB  - Wiley-Blackwell
CY  - Oxford
ER  - 
TY  - JOUR
A1  - Hötter, Jan-Steffen
A1  - Fateri, Miranda
A1  - Gebhardt, Andreas
T1  - Selective laser melting of metals: desktop machines open up new chances even for small companies
JF  - Advanced materials research
N2  - 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.
Y1  - 2012
U6  - http://dx.doi.org/10.4028/www.scientific.net/AMR.622-623.461
SN  - 1662-8985 (E-Journal); 1022-6680 (Print)
VL  - 622-623
SP  - 461
EP  - 465
PB  - Trans Tech Publ.
CY  - Baech
ER  - 
TY  - JOUR
A1  - Michaux, F.
A1  - Mattern, P.
A1  - Kallweit, Stephan
T1  - RoboPIV: how robotics enable PIV on a large industrial scale
JF  - Measurement Science and Technology
N2  - This work demonstrates how the interaction between particle image velocimetry (PIV) and robotics can massively increase measurement efficiency. The interdisciplinary approach is shown using the complex example of an automated, large scale, industrial environment: a typical automotive wind tunnel application. Both the high degree of flexibility in choosing the measurement region and the complete automation of stereo PIV measurements are presented. The setup consists of a combination of three robots, individually used as a 6D traversing unit for the laser illumination system as well as for each of the two cameras. Synchronised movements in the same reference frame are realised through a master-slave setup with a single interface to the user. By integrating the interface into the standard wind tunnel management system, a single measurement plane or a predefined sequence of several planes can be requested through a single trigger event, providing the resulting vector fields within minutes.

In this paper, a brief overview on the demands of large scale industrial PIV and the existing solutions is given. Afterwards, the concept of RoboPIV is introduced as a new approach. In a first step, the usability of a selection of commercially available robot arms is analysed. The challenges of pose uncertainty and importance of absolute accuracy are demonstrated through comparative measurements, explaining the individual pros and cons of the analysed systems. Subsequently, the advantage of integrating RoboPIV directly into the existing wind tunnel management system is shown on basis of a typical measurement sequence. In a final step, a practical measurement procedure, including post-processing, is given by using real data and results. Ultimately, the benefits of high automation are demonstrated, leading to a drastic reduction in necessary measurement time compared to non-automated systems, thus massively increasing the efficiency of PIV measurements.
Y1  - 2018
U6  - http://dx.doi.org/10.1088/1361-6501/aab5c1
SN  - 1361-6501
N1  - Special Section on the 12th International Symposium on Particle Image Velocimetry (PIV 2017)
VL  - 29
IS  - 7
SP  - 074009
PB  - IOP
CY  - Bristol
ER  - 
TY  - JOUR
A1  - Kämper, Klaus-Peter
A1  - Pappas, D. P.
A1  - Hopster, H.
T1  - Reversible transition between perpendicular and in-plane magnetization in ultrathin films. Pappas, D. P.; Kämper, K.-P.; Hopster, H.
JF  - Physical Review Letters. 64 (1990), H. 26
Y1  - 1990
SN  - 1079-7114
SP  - 3179
EP  - 3182
ER  - 
TY  - JOUR
A1  - Leidinger, Rafael
A1  - Noisten, Thomas
A1  - Wollert, Jörg
T1  - Realtime automation networks in moVing industrial environments
JF  - Journal of systemics, cybernetics and informatics
N2  - 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.
KW  - PROFINET
KW  - Distributed Control Systems,
KW  - Industrial Automation Technology,
KW  - 802.15.4
KW  - Bluetooth
KW  - Wireless Networks
Y1  - 2012
SN  - 1690-4532
VL  - Vol. 10
IS  - Iss. 2
SP  - 52
EP  - 56
PB  - IIIC
CY  - Orlando
ER  - 
TY  - JOUR
A1  - Gebhardt, Andreas
T1  - Rapid Prototyping and PIV
Y1  - 2001
N1  - Workshop on Industrial Applications of Particle Image Velocimetry <2001, Köln>
ER  - 
TY  - JOUR
A1  - Gebhardt, Andreas
T1  - Rapid Prototyping
JF  - Landolt-Börnstein - Group VIII Advanced Materials and Technologies‡Vol. 1 Laser Physics and Applications‡Subvol. C  Laser Applications / authors: Bäuerle, D.  ...
Y1  - 2004
SN  - 3-540-00105-0
SP  - 105
EP  - 123
PB  - Heidelberg
CY  - Springer
ER  - 
TY  - JOUR
A1  - Franzen, Julius
A1  - Pinders, Erik
A1  - Pfaff, Raphael
A1  - Enning, Manfred
T1  - RailCrowd’s virtual fleets: Make most of your asset data
JF  - Deine Bahn
N2  - For smaller railway operators or those with a diverse fleet, it can be difficult to collect sufficient data to improve maintenance programs. At the same time, new rules such as entity in charge of maintenance – ECM – regulations impose an additional workload by requiring a dedicated maintenance management system and specific reports. The RailCrowd platform sets out to facilitate compliance with ECM and similar regulations while at the same time pooling anonymised fleet data across operators to form virtual fleets, providing greater data insights.
Y1  - 2018
SN  - 0948-7263
IS  - 9
SP  - 11
EP  - 13
PB  - Bahn-Fachverlag
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Kunkel, Maximilian Hugo
A1  - Gebhardt, Andreas
A1  - Mpofu, Khumbulani
A1  - Kallweit, Stephan
T1  - Quality assurance in metal powder bed fusion via deep-learning-based image classification
JF  - Rapid Prototyping Journal
Y1  - 2019
U6  - http://dx.doi.org/10.1108/RPJ-03-2019-0066
SN  - 1355-2546
VL  - 26
IS  - 2
SP  - 259
EP  - 266
ER  - 
TY  - JOUR
A1  - Raffeis, Iris
A1  - Adjei-Kyeremeh, Frank
A1  - Vroomen, Uwe
A1  - Westhoff, Elmar
A1  - Bremen, Sebastian
A1  - Hohoi, Alexandru
A1  - Bührig-Polaczek, Andreas
T1  - Qualification of a Ni-Cu alloy for the laser powder bed fusion process (LPBF): Its microstructure and mechanical properties
JF  - Applied Sciences
N2  - As researchers continue to seek the expansion of the material base for additive manufacturing, there is a need to focus attention on the Ni–Cu group of alloys which conventionally has wide industrial applications. In this work, the G-NiCu30Nb casting alloy, a variant of the Monel family of alloys with Nb and high Si content is, for the first time, processed via the laser powder bed fusion process (LPBF). Being novel to the LPBF processes, optimum LPBF parameters were determined, and hardness and tensile tests were performed in as-built conditions and after heat treatment at 1000 °C. Microstructures of the as-cast and the as-built condition were compared. Highly dense samples (99.8% density) were achieved after varying hatch distance (80 µm and 140 µm) with scanning speed (550 mm/s–1500 mm/s). There was no significant difference in microhardness between varied hatch distance print sets. Microhardness of the as-built condition (247 HV0.2) exceeded the as-cast microhardness (179 HV0.2.). Tensile specimens built in vertical (V) and horizontal (H) orientations revealed degrees of anisotropy and were superior to conventionally reported figures. Post heat treatment increased ductility from 20% to 31% (V), as well as from 16% to 25% (H), while ultimate tensile strength (UTS) and yield strength (YS) were considerably reduced.
Y1  - 2020
U6  - http://dx.doi.org/10.3390/app10103401
SN  - 2076-3417
N1  - Special Issue Materials Development by Additive Manufacturing Techniques
VL  - 10
IS  - Art. 3401
SP  - 1
EP  - 15
PB  - MDPI
CY  - Basel
ER  - 
TY  - JOUR
A1  - Fateri, Miranda
A1  - Gebhardt, Andreas
T1  - Process Parameters Development of Selective Laser Melting of Lunar Regolith for On-Site Manufacturing Applications
JF  - International Journal of Applied Ceramic Technology
Y1  - 2015
SN  - 1744-7402
U6  - http://dx.doi.org/10.1111/ijac.12326
VL  - 12
IS  - 1
SP  - 46
EP  - 52
PB  - Wiley-Blackwell
CY  - Oxford
ER  - 
TY  - JOUR
A1  - Anik, Sabri
A1  - Frohberg, Martin G.
A1  - Kapoor, Madan Lal
T1  - Prediction of thermodynamic properties of oxygen in binary metallic solvents
JF  - Zeitschrift für Metallkunde
Y1  - 1983
SN  - 0044-3093
VL  - 74
IS  - 6
SP  - 372
EP  - 375
ER  - 
TY  - JOUR
A1  - Gebhardt, Andreas
A1  - Schmidt, Frank-Michael
T1  - Practical experiences with making and finishing of coloured models using 3D printing
Y1  - 2002
N1  - International Conference on Rapid Prototyping and Manufacturing <2, 2002, Beijing>
ER  - 
TY  - JOUR
A1  - Kallweit, Stephan
A1  - Kaminsky, R.
A1  - Rossi, M.
A1  - Scalise, L.
T1  - PIV Measurements with high temporal Resolution behind Artificial  Heart Valves  / Kaminsky, R. ; Rossi, M. ; Scalise, L. ; Kallweit, S. ; Verdonck, P.
JF  - Proceedings of the 6th International Symposium on Particle Image Velocimetry
Y1  - 2005
N1  - link zum abstract
PB  - Caltech
CY  - Pasadena, CA
ER  -