ANSYS Explicit Dynamics-Material Models

•In general, materials have a complex response to dynamic loading

•The following phenomena may need to be modelled

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–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)

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•No single material model incorporates all of these effects

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•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

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–Volumetric Response - changes in volume (pressure)

•Equation of state (EOS)

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–Deviatoric Response - changes in shape

•Strength model

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•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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