In the field of material modeling for polymer and polymer composite materials the major challenge is the development of new physical models or the adaptation of already existing models and to transfer them into mathematical expressions which are able to describe the particular material behavior at its best. The material behavior of the specific polymer or polymer composite material is investigated in experiments. To ensure an accurate characterization of the material, existing test methods are adapted or new test methods are developed, in some extent. The experimental results provide a basis for the calibration and verification of the material models. The aim is the development of material models which are applicable on real component parts to optimize the process of development. The research field deals for example with
Anisotropy and fiber orientation models
Morak, M., Tscharnuter, D., Lucyshyn, T., Gross, T., Steinberger, R., Kummer, M., Hahn, W., Göttlinger, M..: Optimization of fiber prediction model in injection molding simulation based on micro computed tomography. Submitted to Polymer Engineering and Science
Hyper elasticity
Mansouri, M.R., Darijani, H.: Constitutive modeling of isotropic hyperelastic materials in an ex-ponential framework using a self-contained approach. International Journal of Solids and Structures 51(25-26), 4316–4326 (2014). doi: 10.1016/j.ijsolstr.2014.08.018
Generation and adaptation of strain rate dependent material models
Steinberger, R., Gross, T., Reithofer, P., Paul, St.: Considering the local anisotropy of short fiber reinforced plastics: Validation on specimen and component. 11th European LS-DYNA Confer-ence 2017, Salzburg, Austria
Definition of viscoelastic and viscoplastic material models
Tscharnuter, D., Jerabek, M., Major, Z., Pinter, G.: Uniaxial nonlinear viscoelastic viscoplastic modeling of polypropylene. Mech Time-Depend Mater 16(3), 275–286 (2012). doi: 10.1007/s11043-011-9158-5
Multiaxial stress state
Jerabek, M., Tscharnuter, D., Major, Z., Ravi-Chandar, K., Lang, R.: Multiaxial yield behaviour of polypropylene. EPJ Web of Conferences 6, 3005 (2010). doi: 10.1051/epjconf/20100603005
Development of specialized test equipment for the determination of material parameters of defined models
Truszkiewicz, E., Tscharnuter, D., Pilz, G., Pinter, G.: Thermoforming of Polymer Laminate Films. Thermo-Viscoelastic Characterization. In: Proceedings of the ASME International Mechanical Engineering Congress and Exposition - 2015. Presented at ASME 2015 International Mechanical Engineering Congress and Exposition, November 13-19, 2015, Houston, Texas, USA. ASME 2015 International Mechanical Engineering Congress and Exposition, Houston, Texas, USA, Friday 13 November 2015, V009T12A083. The American Society of Mechanical Engineers, New York, N.Y. (2016). doi: 10.1115/IMECE2015-51584
