Calibration of a Phenomenological Foam Material Model from Microscale Simulation
This paper was produced for the 2019 NAFEMS World Congress in Quebec Canada
A finite element representative volume element (FE-RVE) model is developed for the microstructure of an auxetic resilient foam using 3D tomography data. Simulations are performed on these FE-RVE models in which they are subjected to various large, multiaxial far-field strains. Self-contact, large deformation, and material nonlinearity is accounted for, and the volume average stress response under each loading history is obtained. These volume-average stress-strain responses are then used in an optimization process to calibrate a phenomenological hyperfoam material model which closely reproduces the effective homogenized behavior of the foam microstructure, and which can be used to model the foam as a homogenized continuum in larger scale FE simulations. The optimization process includes a novel stability constraint which ensures the resulting hyperfoam model exhibits stability over a broad range of deformations.
|Date ||18th June 2019|
|Organisation||Dassault Systemes, SIMULIA|
|Order Ref||NWC_19_287 Download|
|Non-member Price || £5.00 | $6.19 | €5.56 |
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