Temperature-dependent Deformation and Fracture Behavior of a Talcum-filled Co-polymer
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Beschreibung
David Degenhardt develops an elasto-viscoplastic material model in order to predict the temperature and strain rate-dependent deformation and fracture behavior of thermoplastic polymers. The model bases on three supporting ambient temperatures, where a thermoplastic polymer has been characterized profoundly at the stress states 1) uni-axial tension and compression, 2) bi-axial tension and 3) shear. The core of the material model builds a pressure-dependent yield function with a non-associated flow rule. Further, it contains an analytical hardening law and a strain rate-dependent fracture criterion. The model is validated with components subjected to impact loading at different ambient temperatures. The comparison of the simulation and the experiments shows that stiffness, hardening, fractures strain as well as thicknesses can be well captured.
Contents
- Material Modeling; Yield Functions and Flow Rules
- Static and Dynamic Material Testing
- Temperature-dependent Material Model
- Model Validation with Component Tests
- Scientists and students in the field of material sciences and simulation
- Practitioners in industry in the field of material characterization
David Degenhardt develops an elasto-viscoplastic material model in order to predict the temperature and strain rate-dependent deformation and fracture behavior of thermoplastic polymers. The model bases on three supporting ambient temperatures, where a thermoplastic polymer has been characterized profoundly at the stress states 1) uni-axial tension and compression, 2) bi-axial tension and 3) shear. The core of the material model builds a pressure-dependent yield function with a non-associated flow rule. Further, it contains an analytical hardening law and a strain rate-dependent fracture criterion. The model is validated with components subjected to impact loading at different ambient temperatures. The comparison of the simulation and the experiments shows that stiffness, hardening, fractures strain as well as thicknesses can be well captured.
About the Author:
David Degenhardt is a calculation engineer in the chassis development department of a German automobile manufacturer and earned his doctorate while working at the Technische Universität Carolo-Wilhelmina zu Braunschweig, Germany.
Successful comparison of simulation and experiments
Autor*in
David Degenhardt
Themen in »Temperature-dependent Deformation and Fracture Behavior of a Talcum-filled Co-polymer«
Extended Raghava yield function Modified Mohr-Coulomb fracture criterion Experimental challenges in material testing Bi-axial tension tests Design of a new uni-axial tension test specimen Finite-element method Temperature-dependent deformation Fracture behavior Talcum-filled co-polymer Elasto-viscoplastic material Thermoplastic polymers