10/27/2014

ANSYS Explicit Dynamics-Material Models

In general, materials have a complex response to dynamic loading
The following phenomena may need to be modelled
Non-linear pressure response
Strain hardening
Strain rate hardening
Thermal softening
Compaction (porous materials)
Orthotropic behavior (e.g. composites)
Crushing damage (e.g. ceramics, glass, geological materials, concrete)
Chemical energy deposition (e.g. explosives)
Tensile failure
Phase changes (solid-liquid-gas)
No single material model incorporates all of these effects

Engineering Data offers a selection of models from which you can choose based on the material(s) present in your simulation

Material deformation can be split into two independent parts
Volumetric Response - changes in volume (pressure)
Equation of state (EOS)
Deviatoric Response - changes in shape
Strength model
Also, it is often necessary to specify a Failure model as materials can only sustain limited amount of stress / deformation before they  break / crack / cavitate (fluids).
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