The Envyo application contains two methods to assign material ID (or material properties) according to the found source fiber orientation tensor during the mapping process.

Method 1: Using *ELEMENT_SHELL_COMPOSITE (_LONG)

Since each through thickness IP of composite elements can have a different material ID, you can define a list of fiber orientation tensors and material ID pairs to assign materials IDs for matching tensors. The following options must be defined:

Method 2: Using *MAT 157 IHIS Option

Independent from the previous options of *MAT_157, you can define IHIS=7 or IHIS=15 to activate fiber orientation dependent mapping of material properties. *MAT_157 cards have to be defined in target mesh, and they can also be added to the target mesh as an include using *INCLUDE keyword. Most importantly, the direction components q₁ & q₂ and material stiffnes parameters C_ij are computed by the Envyo application. Therefore, all above-mentioned parameters for IHIS=3 option must be defined. R₀₀, R₄₅, and R₉₀ values for IHIS=7 and an additional LCSS value for IHIS=15 is taken from included *MAT_157 cards. The fiber orientation tensors of material cards have to be defined as a material card title using the following format:

EnvyoOrient:DOUBLE;DOUBLE;DOUBLE

which double values represent a₁₁, a₂₂, and a₃₃ orientations of the tensor. The material ID is taken from the material model.

This method can be enhanced to define through-thickness IPs' material IDs using *ELEMENT_SHELL_COMPOSITE keyword. The following options must be defined in addition to above-mentioned options:

Note that the first method always overwrites the second one. To use the enhancements of the second method, MapMainDir option must be either set to NO, or not defined at all.