I want to simulate an RTM simulation, where I have both mold and core. The mold has isotropic material properties. But can the core have orthotropic material properties? For example, if the core is a strand?
Of curse the mold is isotropic. Based on your material`s configuration: The core would be orthotropic (you nedd to define 9 elastic constants) or transversely isotropic material with one axis of symmetry if your matrix is reinforced by parallel fibers (you need to define 5 elastic constants)