Jorgen
2007-08-28, 21:04
Experimental data and constitutive model predictions for a 15 vol% glass fiber filled PTFE (Teflon) are now available in the Materials and Models section (http://polymerfem.com/cmps_index.php?pageid=mat_mod). The predictive capabilities of a number of different constitutive models are compared and the best model for the given experimental data for this material is found. The experimental data is from tension, compression, stress-relaxation, and volumetric compression. It is interesting to note that there are advanced models that can capture all of the experimental data. Also, it is once again shown that J2-plasticity is not a good choice for this thermoplastic.
The material model that currently best captures the complete set of experimental data - using once set of material parameters - is the DNF model. The DNF (Dual Network Fluoropolymer) model was specifically developed for fluoropolymers and is suitable for thermomechanical large strain finite element analysis.
The material model that currently best captures the complete set of experimental data - using once set of material parameters - is the DNF model. The DNF (Dual Network Fluoropolymer) model was specifically developed for fluoropolymers and is suitable for thermomechanical large strain finite element analysis.