FElupe: Finite Element Analysis

• Add project(mean=True) to project cell mean-values to mesh-points. Now project() supports Triangles and Tetrahedrons.
• Add RegionBoundary.mesh_faces() for a mesh with face-cells on the selected boundary of a region.
• Add pseudo-elastic material OgdenRoxburgh() which may be used with SolidBodyNearlyIncompressible().
• Add umat = UserMaterial(stress, elasticity, nstatevars=0, **kwargs) with user-defined functions for the (first Piola-Kirchhoff) stress tensor P, statevars_new = umat.gradient([F, statevars], **kwargs) and the according fourth-order elasticity tensor A = umat.hessian([F, statevars], **kwargs) based on the deformation gradient.
• Add UserMaterialStrain() for small-strain based user-defined material formulations with an umat-interface suitable for elastic-plastic frameworks.
• Add LinearElasticPlasticIsotropicHardening() which is based on UserMaterialStrain() and constitution.linear_elastic_plastic_isotropic_hardening().
• Add new math helpers math.ravel() and math.reshape().
• Add optional axis argument on which the norm is evaluated math.norm(axis=None).

• Unify material definition with methods for the stress P, statevars_new = umat.gradient([F, statevars]) and the elasticity tensor A = umat.hessian([F, statevars]). This breaks support for materials defined by matadi<=0.1.10.
• Do not broadcast the (constant) elasticity tensor for linear-elastic materials as einsumt>=0.9.3 supports broadcasting along the parallel-executed dimension.
• Change not-updating attribute of FieldContainer(fields).values to a method FieldContainer(fields).values() which returns the current field values.

• Remove unused SolidBodyTensor() and SolidBodyTensorNearlyIncompressible().
• Remove unused region argument of LinearElastic().hessian().

• Add project(mean=True) by @adtzlr in https://github.com/adtzlr/felupe/pull/329
• Add RegionBoundary.mesh_faces() by @adtzlr in https://github.com/adtzlr/felupe/pull/334
• Add pseudo-elastic material OgdenRoxburgh() by @adtzlr in https://github.com/adtzlr/felupe/pull/335
• Unify umat for hyperelastic and tensor-based material formulations by @adtzlr in https://github.com/adtzlr/felupe/pull/339
• Do not broadcast linear-elastic elasticity tensor by @adtzlr in https://github.com/adtzlr/felupe/pull/342
• FieldContainer: Change attribute values to method values() by @adtzlr in https://github.com/adtzlr/felupe/pull/344
• Add UserMaterialStrain() by @adtzlr in https://github.com/adtzlr/felupe/pull/346
• Enhance and Fix the Documentation by @adtzlr in https://github.com/adtzlr/felupe/pull/347

Full Changelog: https://github.com/adtzlr/felupe/compare/v5.3.1...v6.0.0