You must define the Young’s Modulus EX (also called the Modulus of Elasticity). Poisson’s Ratio (NUXY) is assumed to be zero if not defined. In addition, you need to define the density (DENS) when considering the effect of gravity and/or centrifugal loading and the coefficient of thermal expansion (ALPX) when considering thermal loading. When you select a material from a default material library, these properties are assigned automatically. The default value for the Shear modulus (GXY) is calculated from: GXY = EX/2(1+NUXY).
The above description applies for isotropic materials. For orthotropic materials, you can define different Moduli of Elasticity, Shear Moduli, Poisson Ratios, and/or Coefficients of Thermal Expansion in different directions.
Compressive, tensile, and yield strength are used by failure criteria to assess failure. They are not used in calculating stresses.
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