This blog post aims to support the Material Modeling and Calibration blog post by Tod Dalrymple with specific information on DuPont Performance Materials engineering polymers.
There are various material models which are used to simulate the behavior of polymers, from simple elastic-plastic isotropic models, to the parallel rheological framework (PRF). We have evaluated some of these models for both a stiff, un-reinforced POM (Delrin(r)) and a highly flexible thermoplastic elastomer (Hytrel(r)). The results have been presented at the Science in the Age of Experience 2017 Conference and both the paper and the presentation can be found below.
The next paragraph contains an example for the material modeling. The second paragraph provides links to material data used for this example.
I will use this post to continue to add more information over time.
Example case
A simple 3-point bending test has been used to show the performance of an elastic-plastic model and a hyperelastic-plastic model for a high-viscosity Delrin(r). The images below show the Abaqus model used and the results of both the test and the simulation results.
Abaqus FEA model of 3-point bending test (from Anders Winkler).
Analysis results of isotropic elastic-plastic and hyperelastic-plastic models
Material test data
DuPont is supporting Simulia in the development of better models for engineering polymers, by providing feedback, material data and test cases. I will make some of this data for the wider community, which you can find following the links below.
