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Anisotropic material with MSC NASTRAN

Thread starter Johncf
Start date Jun 28, 2007

Status: Not open for further replies.

Jun 28, 2007

Johncf

Aerospace

can anyone help? i'm performing a thermal analysis of a ring with an anisotropic material. as a test case (to verify BC's and modeling), i apply a unit temperature to a free-free model. using MAT1 (isotropic) i get stress free expansion.

switching to MAT9 (anisotropic) [i have entered isotrpoic propetties for this test case] and using the ALIGN TO ELEMENT option on PSOLID, i also get stress free expansion. when i switch the PSOLID to align to a coordinate system, i do not get stress free expansion for the ISOTROPIC MAT9 material

any thoughts?