Materials: Isotropic

Description

The mechanical behaviour of an isotropic material is independent of the direction of loading and its properties, for linear analysis, can be characterised by the following parameters:

- Young's modulus.
- Shear modulus or , Poisson's ratio.
- linear thermal expansion coefficient.
- volumetric mass density.
- thermal conductivity.
- coefficient of specific heat.

Constraints and Relationships

The shear modulus, Young's modulus and Poisson's ratio satisfy the following equation:

Therefore, only two of the parameters are required since the third is a function of the other two.

In Strand7 the Young's modulus is always required. For some materials either the shear modulus or the Poisson's ratio can be specified.

The validity of the data will be checked against the following conditions:

For plane stress analysis, including plate/shell, n = 0.5 is also valid.

See the Strand7 Theoretical Manual for more information.