This project describes the continuing development of a material database which elucidates the structure-property relations of selected polymeric materials along with a constitutive framework which captures the material response and failure of the polymers.
The experimental part includes test results performed using an INSTRON tensile-compressive machine available at Mississippi State University’s Center for Advanced Vehicular Systems (CAVS) and a servo-hydraulic test system for medium strain rates available at University of Dayton Research Institute (UDRI). We used these tests to capture the time, temperature and stress state dependence, as well as failure mechanisms and large-strain mechanical responses of PC and PP. Stress-strain responses show typical features of thermoplastics, characterized by an elastic regime, followed by a non-linear yield peak, strain softening, and subsequent strain hardening. The mechanical response is observed to be time and temperature dependent.