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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