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Technical Paper

CAE Simulation Approach to Predict Behavior of Hyper-Elastic (Rubber) Material

2016-04-05
2016-01-0403
Stiffness evaluation for components made from natural rubber using Finite Element simulation technique had been discussed in this paper. Conventional method for extraction of stiffness with metallic parts like steel using linear approach is no more valid for rubber (elastomers). Unique properties of elastomers seeks for special material model and capture non-linear behavior. Use of such material models calls for experimental test data with multiple possible directions like uniaxial tension, uniaxial compression, bi-axial tension, planar shear and volumetric test to extract material constants that can capture appropriate deformation modes of the structure. Higher strains also necessitate here to use more complex material models (Ogden, higher order polynomial) to accurately predict the stiffness characteristics. Special element formulation called hyper-elastic elements is been used to model the rubber parts in FE-Modelling.
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