elastoplastic → constitutive Relation

File in include/elastoplastic	Includes file in include/constitutive
core / elastoplasticmaterial.hpp	materialbase.hpp
core / elastoplasticmodel.hpp	constants.hpp
core / elastoplasticmodel.hpp	elastoplasticmodelbase.hpp
core / elastoplasticmodel.hpp	fabric.hpp
j2yang.hpp	transform.hpp
mohrcoulomb.hpp	constants.hpp
simsand.hpp	transform.hpp