@inproceedings{16035, author = {{Striewe, Jan André and Grothe, R. and Kowatz, Jannik and Tröster, Thomas and Grundmeier, Guido and Meschut, Gerson}}, location = {{Athen}}, title = {{{Design and Testing of Co-Cured Bonded CFRP-Steel Hybrids with Nanostructured Interfaces for Interlaminar Fracture Toughness}}}, year = {{2018}}, } @inproceedings{16050, author = {{Camberg, Alan Adam and Tröster, Thomas and Heggemann, Thomas and Homberg, H. and Schaper, Mirko and Dietrich, J. and Bremser, Wolfgang and Achterberg, L. and Kabst, M. and Wille, M. and Peckhaus, Volker}}, location = {{Dortmund}}, title = {{{LHYBS – Lightweight Design by Novel Hybrid Materials}}}, year = {{2018}}, } @inproceedings{16055, author = {{Zinn, C. and Wang, Z. and Tröster, Thomas and Schaper, Mirko}}, location = {{Bremen}}, title = {{{Forming and corrosion stability of a laser pre-treated metal surface-influence on the properties of metal-CFRP hybrid structures made by VARTM}}}, year = {{2018}}, } @article{41528, author = {{Engelkemeier, Katja and Mücke, Christian and Hoyer, Kay-Peter and Schaper, Mirko}}, issn = {{2522-0128}}, journal = {{Advanced Composites and Hybrid Materials}}, keywords = {{Materials Chemistry, Polymers and Plastics, Materials Science (miscellaneous), Ceramics and Composites}}, number = {{1}}, pages = {{189--199}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Anodizing of electrolytically galvanized steel surfaces for improved interface properties in fiber metal laminates}}}, doi = {{10.1007/s42114-018-0071-0}}, volume = {{2}}, year = {{2018}}, } @article{41527, author = {{Engelkemeier, Katja and Hoyer, Kay-Peter and Schaper, Mirko}}, issn = {{0167-577X}}, journal = {{Materials Letters}}, keywords = {{Mechanical Engineering, Mechanics of Materials, Condensed Matter Physics, General Materials Science}}, pages = {{752--756}}, publisher = {{Elsevier BV}}, title = {{{Influence of sp3/sp2-carbon ratio of vertically standing carbon nanostructures produced by pulsed laser-treatment on PAN-based carbon fibers}}}, doi = {{10.1016/j.matlet.2018.11.041}}, volume = {{236}}, year = {{2018}}, } @article{24107, author = {{Engelkemeier, Katja and Mücke, Christian and Hoyer, Kay-Peter and Schaper, Mirko}}, issn = {{2522-0128}}, journal = {{Advanced Composites and Hybrid Materials}}, pages = {{189--199}}, title = {{{Anodizing of electrolytically galvanized steel surfaces for improved interface properties in fiber metal laminates}}}, doi = {{10.1007/s42114-018-0071-0}}, year = {{2018}}, } @article{24106, author = {{Engelkemeier, Katja and Hoyer, Kay-Peter and Schaper, Mirko}}, issn = {{0167-577X}}, journal = {{Materials Letters}}, pages = {{752--756}}, title = {{{Influence of sp3/sp2-carbon ratio of vertically standing carbon nanostructures produced by pulsed laser-treatment on PAN-based carbon fibers}}}, doi = {{10.1016/j.matlet.2018.11.041}}, year = {{2018}}, } @article{15958, author = {{Zinn, Carolin and Bobbert, Mathias and Dammann, Christian and Wang, Zheng and Tröster, Thomas and Mahnken, Rolf and Meschut, Gerson and Schaper, Mirko}}, issn = {{1359-8368}}, journal = {{Composites Part B: Engineering}}, pages = {{173--185}}, title = {{{Shear strength and failure behaviour of laser nano-structured and conventionally pre-treated interfaces in intrinsically manufactured CFRP-steel hybrids}}}, doi = {{10.1016/j.compositesb.2018.05.030}}, year = {{2018}}, } @article{23902, author = {{Grydin, Olexandr and Andreiev, Anatolii and Sotirov, Nikolay and Stolbchenko, Mykhailo and Behr, Teresa M. and Ashkelianets, Anton and Frolov, Iaroslav and Schaper, Mirko}}, issn = {{1047-4838}}, journal = {{JOM}}, pages = {{407--418}}, title = {{{Water Quenching of Hot-Rolled Aluminum Strips: Process Integrated Heat Treatment of the Alloy EN AW-6082}}}, doi = {{10.1007/s11837-018-3144-1}}, year = {{2018}}, } @article{23903, author = {{Lossen, Benjamin and Andreiev, Anatolii and Stolbchenko, Mykhailo and Homberg, Werner and Schaper, Mirko}}, issn = {{0924-0136}}, journal = {{Journal of Materials Processing Technology}}, pages = {{242--250}}, title = {{{Friction-spinning—Grain structure modification and the impact on stress/strain behaviour}}}, doi = {{10.1016/j.jmatprotec.2018.06.015}}, year = {{2018}}, } @article{25911, abstract = {{Different types of reduced graphene oxide and graphene oxide particles have been studied regarding their influence on the curing behaviour of epoxy-amine resins. Especially the specific surface area of reduced graphene oxide was selectively influenced by controlled drying of the material. The different types of reduced graphene oxide particles were used to produce epoxy-amine composites that significantly change their curing behaviour and mechanical properties. A variety of surface areas and compositions were prepared by combination of a fast heating rate and different drying methods. The combination of freeze drying with a fast heating rate leads to a large specific surface area of 680 m2/g. The morphologies of the particles were observed by scanning electron microscope and the BET surface area was measured with nitrogen-physisorption. The exfoliation quality was measured by XRD. The generated graphene oxide and thermally reduced graphene oxide particles were mixed with epoxy-amine resin. The curing behaviour was studied with rheological and differential scanning calorimetry (DSC) measurements. We observed that different surface functionalities lowers the Glass transition temperature and the gel time of an epoxy-amine curing system. In addition, we found that generated graphene oxide acts as flexibilizer. An increase of the deformation from 2.5 mm to 3.1 mm was measured by Erichsen Cupping Test.}}, author = {{Wolk, Andreas and Rosenthal, Marta and Weiß, Julia and Voigt, Markus and Wesendahl, Jan-Niklas and Hartmann, Marc and Grundmeier, Guido and Wilhelm, Rene and Meschut, Gerson and Tiemann, Michael and Bremser, Wolfgang}}, issn = {{0300-9440}}, journal = {{Progress in Organic Coatings}}, pages = {{280--289}}, title = {{{Graphene oxide as flexibilizer for epoxy amine resins}}}, doi = {{10.1016/j.porgcoat.2018.05.028}}, year = {{2018}}, } @article{20281, abstract = {{The newly developed joining-by-forming technology “shear-clinching”, features a potentially single-stage process for joining UHSS without requiring any additional elements. Foundational studies have focused on the functionality of shear-clinching at a one-element sample. To ensure the safety of the industrial application of the shear-clinching technology, an investigation with component-like samples with several joints is required. This paper presents a detailed analysis of the material behaviour during the shear-clinching process with multi-element specimens to evaluate the influence of the neighbouring joints. In order to describe the influence of the neighbouring joints, the deformations resulting from the bending and material displacement are recorded without contact after the joining process: locally around the joining point and globally over the entire sample size. To minimize such bending effects, a tool-sided adaptation is provided. The results show the high potential of shear-clinching joining by UHSS and give further recommendations for future multi-material application.}}, author = {{Han, Daxin and Hörhold, Réjane and Müller, Martin and Wiesenmayer, Sebastian and Merklein, Marion and Meschut, Gerson}}, issn = {{1662-9795}}, journal = {{Key Engineering Materials}}, pages = {{389--396}}, title = {{{Shear-Clinching of Multi-Element Specimens of Aluminium Alloy and Ultra-High-Strength Steel}}}, doi = {{10.4028/www.scientific.net/kem.767.389}}, year = {{2018}}, } @article{19755, author = {{Meyer, Sebastian and Meschut, Gerson and Vogt, Hendrik and Behrens, Bernd-Arno and Hübner, Sven and Neumann, André}}, issn = {{0043-2288}}, journal = {{Welding in the World}}, pages = {{565--574}}, title = {{{Application of self-piercing nuts during hot forming of 22MNB5}}}, doi = {{10.1007/s40194-018-00688-8}}, year = {{2018}}, } @article{19394, author = {{Meschut, Gerson and Teutenberg, Dominik and Wünsche, Marc}}, issn = {{1619-1919}}, journal = {{adhäsion KLEBEN & DICHTEN}}, pages = {{16--21}}, title = {{{Prüfkonzept für geklebte Stahl/CFK-Strukturen}}}, doi = {{10.1007/s35145-015-0513-6}}, year = {{2018}}, } @article{20136, author = {{Meyer, Sebastian and Meschut, Gerson and Behrens, Bernd-Arno and Vogt, Hendrik and Neumann, Andre}}, journal = {{Werkstattstechnik online}}, title = {{{Funktionsintegration in der Warmblechumformung}}}, year = {{2018}}, } @phdthesis{9994, abstract = {{Reliability-adaptive systems allow an adaptation of system behavior based on current system reliability. They can extend their lifetime at the cost of lowered performance or vice versa. This can be used to adapt failure behavior according to a maintenance plan, thus increasing availability while using up system capability fully. To facilitate setup, a control algorithm independent of a degradation model is desired. A closed loop control technique for reliability based on a health index, a measure for system degradation, is introduced. It uses self-optimization as means to implement behavior adaptation. This is based on selecting the priorities of objectives that the system pursues. Possible working points are computed beforehand using model-based multiobjective optimization techniques. The controller selects the priorities of objectives and this way balances reliability and performance. As exemplary application, an automatically actuated single plate dry clutch is introduced. The entire reliability control is setup and lifetime experiments are conducted. Results show that the variance of time to failure is reduced greatly, making the failure behavior more predictable. At the same time, the desired usable lifetime can be extended at the cost of system performance to allow for changed maintenance intervals. Together, these possibilities allow for greater system usage and better planning of maintenance.}}, author = {{Meyer, Tobias}}, keywords = {{dependability, reliability, behavior adaptation, self-optimization, multiobjective optimization, optimal control, automotive drivetrain, clutch system, reliability-adaptive system}}, publisher = {{Shaker}}, title = {{{Optimization-based reliability control of mechatronic systems}}}, year = {{2018}}, } @article{59979, abstract = {{Currently, it is state of the art to use precipitation hardening 6000-series aluminum alloys to manufacture high-strength aluminum automotive parts by extrusion or in a cold forming process. Alternatively, it is also possible to produce such parts by the use of non-precipitation hardening 5000-series aluminum alloys in a work-hardened condition. Therefore, BENTELER Automobiltechnik GmbH developed a special sheet forming process, henceforth referred to as "flash forming process". The application of the flash forming process, consisting of a rapid heat treatment and a subsequent cold die stamping, increases the forming capability of the work-hardened 5000-series aluminum sheets and results in high-strength parts with a very good ductility and weldability. In addition, this thermal assisted forming process allows a cost-saving production of such high-strength aluminum parts due to lower material costs of 5000-series aluminum alloys than those of a 6000-series material. Furthermore, the weight-saving effects of "flash formed" parts can be higher compared to extruded or cold formed 6000-series aluminum alloys. The suitability of the process is evaluated by forming a commercial AW-5182 H18 aluminum sheet to a crash-relevant automotive part. However, to accurately simulate the flash forming process itself, a temperature dependent fracture model is necessary. Investigations on a coupon basis also showed that the effect of adiabatic heating due to plastic work cannot be neglected. In cooperation with Paderborn University, a detailed mechanical testing, aided by digital image correlation (DIC) and thermal imaging, is carried out to characterize the yield, hardening and fracture behavior at elevated temperatures. The experimental tests are followed by the calibration of a FLD and an incremental stress state dependent fracture model in LS-DYNA. Finally, the simulation models are validated on a cross die deep drawn cup.}}, author = {{Camberg, A A and Bohner, F and Tölle, J and Schneidt, A and Meiners, S and Tröster, Thomas}}, issn = {{1757-899X}}, journal = {{IOP Conference Series: Materials Science and Engineering}}, publisher = {{IOP Publishing}}, title = {{{Formability enhancement of EN AW-5182 H18 aluminum alloy sheet metal parts in a flash forming process: testing, calibration and evaluation of fracture models}}}, doi = {{10.1088/1757-899x/418/1/012018}}, volume = {{418}}, year = {{2018}}, } @inproceedings{16048, author = {{Ahlers, Dominik and Tröster, Thomas and Hermann, S. and Koppa, P. and Gloetter, P. and Schaper, Mirko and Peters, M. and Burns, M. and Hengsbach, Florian and Altmann, A.}}, booktitle = {{Contributed Papers from MS&T17}}, isbn = {{9780873397667}}, title = {{{Selective Laser Melting of Ti6Al4V with High Build Rates and Following Hot Isostatic Pressing}}}, doi = {{10.7449/2018mst/2018/mst_2018_117_124}}, year = {{2018}}, } @inproceedings{15960, author = {{Weiß-Borkowski, Nathalie and Lian, Junhe and Camberg, Alan Adam and Tröster, Thomas and Münstermann, Sebastian and Bleck, Wolfgang and Gese, Helmut and Richter, Helmut}}, title = {{{Forming limit curves of DP600 determined in high-speed Nakajima tests and predicted by two different strain-rate-sensitive models}}}, doi = {{10.1063/1.5035024}}, year = {{2018}}, } @article{41525, author = {{Hengsbach, Florian and Koppa, Peter and Holzweissig, Martin Joachim and Aydinöz, Mehmet Esat and Taube, Alexander and Hoyer, Kay-Peter and Starykov, Oleksiy and Tonn, Babette and Niendorf, Thomas and Tröster, Thomas and Schaper, Mirko}}, issn = {{2363-9512}}, journal = {{Progress in Additive Manufacturing}}, keywords = {{Industrial and Manufacturing Engineering}}, number = {{4}}, pages = {{221--231}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Inline additively manufactured functionally graded multi-materials: microstructural and mechanical characterization of 316L parts with H13 layers}}}, doi = {{10.1007/s40964-018-0044-4}}, volume = {{3}}, year = {{2018}}, }