@article{AbbasHedwigBalcetal.2023, author = {Abbas, Karim and Hedwig, Lukas and Balc, Nicolae and Bremen, Sebastian}, title = {Advanced FFF of PEEK: Infill strategies and material characteristics for rapid tooling}, series = {Polymers}, volume = {2023}, journal = {Polymers}, number = {15}, publisher = {MDPI}, address = {Basel}, doi = {10.3390/polym15214293}, pages = {Artikel 4293}, year = {2023}, abstract = {Traditional vulcanization mold manufacturing is complex, costly, and under pressure due to shorter product lifecycles and diverse variations. Additive manufacturing using Fused Filament Fabrication and high-performance polymers like PEEK offer a promising future in this industry. This study assesses the compressive strength of various infill structures (honeycomb, grid, triangle, cubic, and gyroid) when considering two distinct build directions (Z, XY) to enhance PEEK's economic and resource efficiency in rapid tooling. A comparison with PETG samples shows the behavior of the infill strategies. Additionally, a proof of concept illustrates the application of a PEEK mold in vulcanization. A peak compressive strength of 135.6 MPa was attained in specimens that were 100\% solid and subjected to thermal post-treatment. This corresponds to a 20\% strength improvement in the Z direction. In terms of time and mechanical properties, the anisotropic grid and isotropic cubic infill have emerged for use in rapid tooling. Furthermore, the study highlights that reducing the layer thickness from 0.15 mm to 0.1 mm can result in a 15\% strength increase. The study unveils the successful utilization of a room-temperature FFF-printed PEEK mold in vulcanization injection molding. The parameters and infill strategies identified in this research enable the resource-efficient FFF printing of PEEK without compromising its strength properties. Using PEEK in rapid tooling allows a cost reduction of up to 70\% in tool production.}, language = {en} } @inproceedings{AbbasThurnKessleretal.2019, author = {Abbas, Karim and Thurn, Laura and Kessler, Julia and Eichler, Fabian}, title = {Basic research of the consideration of additive manufactured lattice structures under thermoand fluid dynamic loads}, series = {Modern technologies in manufacturing (MTeM 2019)}, volume = {299}, booktitle = {Modern technologies in manufacturing (MTeM 2019)}, number = {Article 01009}, doi = {10.1051/matecconf/201929901009}, pages = {8 Seiten}, year = {2019}, language = {en} } @article{AbdelLatifPeekenBenner1985, author = {Abdel-Latif, Lotfie Ahmed and Peeken, Heinz and Benner, Joachim}, title = {Thermohydrodynamic analysis of thrust-bearing with circular pads running on bubbly oil (BTHD-theory)}, series = {Journal of tribology}, volume = {107}, journal = {Journal of tribology}, number = {4}, isbn = {0742-4787}, issn = {1528-8897}, pages = {527 -- 537}, year = {1985}, language = {en} } @article{AbdelLatifPeekenBenner1985, author = {Abdel-Latif, Lotfie Ahmed and Peeken, Heinz and Benner, Joachim}, title = {Термогидродинамический расчет упорных подшипников с круговыми подушками на масляной пленке, содержащей пузырьки газа}, series = {Проблемы трения и смазки}, volume = {107}, journal = {Проблемы трения и смазки}, number = {4}, pages = {94 -- 102}, year = {1985}, language = {ru} } @misc{AbdelghaniMenaaObareetal.2013, author = {Abdelghani, Adnane and Menaa, Bouzid and Obare, Sherine O. and Sch{\"o}ning, Michael Josef}, title = {Special issue on nanoscale science and technology / guest eds.: Adnane Abdelghani, Bouzid Menaa, Sherine O. Obare, Michael J. Sch{\"o}ning}, series = {International journal of nanotechnology}, volume = {Vol. 10}, journal = {International journal of nanotechnology}, number = {No. 5-7}, issn = {1741-8151 (E-Journal), 1475-7435 (Print)}, pages = {373 -- 619}, year = {2013}, language = {en} } @article{AbelKahmannMellonetal.2020, author = {Abel, Alexander and Kahmann, Stephanie Lucina and Mellon, Stephen and Staat, Manfred and Jung, Alexander}, title = {An open-source tool for the validation of finite element models using three-dimensional full-field measurements}, series = {Medical Engineering \& Physics}, volume = {77}, journal = {Medical Engineering \& Physics}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1350-4533}, doi = {10.1016/j.medengphy.2019.10.015}, pages = {125 -- 129}, year = {2020}, abstract = {Three-dimensional (3D) full-field measurements provide a comprehensive and accurate validation of finite element (FE) models. For the validation, the result of the model and measurements are compared based on two respective point-sets and this requires the point-sets to be registered in one coordinate system. Point-set registration is a non-convex optimization problem that has widely been solved by the ordinary iterative closest point algorithm. However, this approach necessitates a good initialization without which it easily returns a local optimum, i.e. an erroneous registration. The globally optimal iterative closest point (Go-ICP) algorithm has overcome this drawback and forms the basis for the presented open-source tool that can be used for the validation of FE models using 3D full-field measurements. The capability of the tool is demonstrated using an application example from the field of biomechanics. Methodological problems that arise in real-world data and the respective implemented solution approaches are discussed.}, language = {en} } @inproceedings{AbelPerezVianaCiritsisetal.2017, author = {Abel, Alexander and P{\´e}rez-Viana, Daniel and Ciritsis, Bernard and Staat, Manfred}, title = {Prevention of femur neck fractures through femoroplasty}, series = {2nd YRA MedTech Symposium 2017 : June 8th - 9th / 2017 / Hochschule Ruhr-West}, booktitle = {2nd YRA MedTech Symposium 2017 : June 8th - 9th / 2017 / Hochschule Ruhr-West}, editor = {Erni, Daniel and Fischerauer, Alice and Himmel, J{\"o}rg and Seeger, Thomas and Thelen, Klaus}, publisher = {Universit{\"a}t Duisburg-Essen}, address = {Duisburg}, organization = {MedTech Symposium}, isbn = {978-3-9814801-9-1}, doi = {10.17185/duepublico/43984}, pages = {114 -- 115}, year = {2017}, language = {en} } @inproceedings{AbelBoninAlbrachtetal.2010, author = {Abel, Thomas and Bonin, Dominik and Albracht, Kirsten and Zeller, Sebastian and Br{\"u}ggemann, Gert-Peter and Burkett, Brendan and Str{\"u}der, Heiko K.}, title = {Kinematic profile of the elite handcyclist}, series = {28th International Conference on Biomechanics in Sports, Marquette, Michigan, USA, July 19 - 23, 2010}, booktitle = {28th International Conference on Biomechanics in Sports, Marquette, Michigan, USA, July 19 - 23, 2010}, issn = {1999-4168}, pages = {140 -- 141}, year = {2010}, language = {en} } @incollection{AbelBoninAlbrachtetal.2015, author = {Abel, Thomas and Bonin, Dominik and Albracht, Kirsten and Zeller, Sebastian and Burkett, Brendan}, title = {Kinematische Untersuchung der Kurbelbewegung im Handcycling: Entwicklung einer sportartspezifischen Methode}, series = {Behindertensport 1951-2011 : Historische und aktuelle Aspekte im nationalen und internationalen Dialog}, booktitle = {Behindertensport 1951-2011 : Historische und aktuelle Aspekte im nationalen und internationalen Dialog}, publisher = {Meyer \& Meyer}, address = {Aachen}, isbn = {9783898997249}, pages = {82 -- 91}, year = {2015}, language = {de} } @incollection{AbelnDoeringFeldmannetal.2010, author = {Abeln, Bj{\"o}rn and D{\"o}ring, Bernd and Feldmann, Markus and Geßler, Achim and M{\"o}ller, Sebastian and Paschen, Michael and Sedlacek, Gerhard}, title = {Entwicklungen zu Stahlfahrbahnen von Straßenbr{\"u}cken}, series = {Festschrift zum 60. Geburtstag von Univ.-Prof. Dr.-Ing. Ingbert Mangerig. (Berichte aus dem Konstruktiven Ingenieurbau / Universit{\"a}t der Bundeswehr M{\"u}nchen ; 10/6)}, booktitle = {Festschrift zum 60. Geburtstag von Univ.-Prof. Dr.-Ing. Ingbert Mangerig. (Berichte aus dem Konstruktiven Ingenieurbau / Universit{\"a}t der Bundeswehr M{\"u}nchen ; 10/6)}, publisher = {Univ. der Bundeswehr}, address = {Neubiberg}, pages = {65 -- 76}, year = {2010}, language = {de} }