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MaterialModelsBase

Dev Build Status Coverage

Provide interface to "standard" history dependent mechanical (stress-strain) material models that is independent of the implementation.

Main interface function

stress, stiffness, state, [full_strain] = material_response(
    [stress_state::AbstractStressState]               # Optional stress state (e.g. plane stress) if full 3d is not desired
    m::AbstractMaterial,                              # Describes the specific material and its parameters
    strain::Union{SymmetricTensor{2}, Tensor{2}, Vec},# ϵ (small strain tensor), F (deformation gradient), or u (displacement jump)
    old::AbstractMaterialState,                       # The old material state
    Δt,                                               # The time step
    cache::AbstractMaterialCache,                     # A cache that can be used to reduce allocations inside material_response
    extras::AbstractExtraOutput)                      # Custom struct whose entries can be mutated to provide extra information from material_response's calculations

Dependencies

The dependencies are limited to Tensors.jl and its dependencies to keep the package light-weight.

Limitations

  • Only mechanical materials: stress-strain (continuum elements) or force-displacement (cohesive elements)
  • Gradient-dependent materials are not supported. This restriction would be nice to lift if a suitable interface can be determined.

Acknowledgements

The interface was developed based on MaterialModels.jl