Import NASTRAN File: Materials

Description

NASTRAN uses MAT1 to define linear, temperature-independent, isotropic materials. All supported property types can use MAT1 materials for structural problems. Straus7 reads the elastic modulus, shear modulus, Poisson's ratio, density, expansion coefficient and damping coefficient. The Straus7 material type is set to isotropic. Other data is ignored.

NASTRAN uses MAT4 to define the thermal attributes of temperature-independent, isotropic materials. All supported property types (except PSHEAR plate properties) can use MAT4 materials for thermal problems. Straus7 reads the thermal conductivity and specific heat.

Posting Material Data

After reading material data, Straus7 posts it to all properties referencing the material. MAT1 and MAT4 data may be applied to beam, plate and brick properties.

Structural materials (MAT1, MAT2, MAT8, MAT9) have unique ID numbers; thermal materials (MAT4, MAT5) also have unique numbers. However, a structural material and a thermal material may have the same ID number.

NASTRAN uses MAT2 to define linear, temperature-independent, anisotropic materials for two dimensional elements. Only PSHELL plate properties can use MAT2 materials for structural problems. Straus7 reads all six components of the elasticity matrix, all three components of thermal expansion, density and damping coefficient. Other data is ignored. The Straus7 material type is set to anisotropic.

NASTRAN uses MAT3 to define linear, temperature-independent, orthotropic materials for CTRIAX6 plate elements. Straus7 does not support MAT3 materials, because there is no corresponding property that they can be assigned to. In NASTRAN, a MAT3 reference is made directly by the CTRIAX6 element itself.

NASTRAN uses MAT5 to define the thermal attributes of temperature-independent, anisotropic materials. All supported property types (except PSHEAR plate properties) can use MAT4 materials for thermal problems. Straus7 reads three components of thermal conductivity (Kxx, Kyy, Kzz) and specific heat. Other data is ignored.

NASTRAN uses MAT8 to define orthotropic materials for isoparametric plate elements. Only PSHELL plate properties can use MAT8 materials for structural problems. Straus7 reads both components of elastic modulus, both components of thermal expansion, shear modulus, Poisson's ratio, density and damping coefficient. Other data is ignored. The Straus7 material type is set to orthotropic.

NASTRAN uses MAT9 to define linear, temperature-independent, anisotropic materials for solid isoparametric elements. Only PSOLID brick properties can use MAT9 materials for structural problems. Straus7 reads all 21 components of the elasticity matrix all six components of expansion coefficient, density and damping coefficient. Other data is ignored. The Straus7 material type is set to anisotropic.

NASTRAN uses MAT10 to define fluid elements in a coupled fluid-structural analysis. Only PSOLID brick properties can use MAT10 materials for structural problems. Straus7 reads the bulk modulus, density and viscous damping. If either the bulk modulus or density is zero, the speed of sound is read so the zero value can be evaluated according to [bulk modulus] = [speed of sound × speed of sound] × [density]. Other data is ignored. The Straus7 material type is set to fluid.

Posting Material Data

After reading material data, Straus7 posts it to all properties referencing the material. MAT5 data may be applied to beam, plate and brick properties. MAT2 and MAT8 data may only be applied to plate properties. MAT9 data may only be applied to brick properties.