Good mourning Dear iMecha mates,
The user subroutine UDMGINI in Stress analysis Software Abaqus is used to define a damage initiation criterion, in fact one can define many criterions using this subroutines, among them we can define thse so called The maximum principal stress criterion in wich we use the mechanical properties to assess the damage through the so called User-specified array of material constants associated with this user-defined failure criterion noted by PROPS (NPROPS), NPROPS is the number of properties, these properties are assigned to the specified array PROPS as constants, in certain situations these parametres are not constant all over the specimen for some nonhomoeneous materials for example and their mechanical peoperties change values with coordinates (space dependante varialbles) so it would be more convenient and precise to consider them variable when we want to use a damage initiation criterion to model damage in this categorie of materials, so my question is how to implement this kind of space variable mechanical properties using the Abaqus variable PROPS and then use in UDMGINI damage subroutine ? and how to do that. thanks very much