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# Block Label Property in Stress Analysis

## Elastisity

On this page, enter components of elasticity tensor: Young's moduli, Poisson's ratios and shear modulus. Leave None or blank in any Young's moduli box to specify that the block with the corresponding label is excluded. With isotropic material, only two components of a tensor are independent. To define orthotropic properties, first check the Anisotropic box.

Coordinates

Have sense for anisotropic materials or compound (sliced) materials modeled as orthotropic. Specify Cartesian or Polar according to the class of symmetry of anisotropy.

Related Topics
Displacement, Strain and Stress

Thermal Strain

Enter coefficients of thermal expansion here. To define variant coefficients in different directions, first check the Anisotropic box. Normally, you specify also the temperature difference between strained and strainless states. With coupled problems, where the temperature of strained state is obtained from thermal analysis, you should specify the temperature of unstrained state.

Body Force

Enter components of body force density here. Body force vector components can depend on coordinates. To specify coordinate-dependent loads, enter the required formula in place of numerical value. Formulas are discussed in details in Working with Formulas section.

Coordinates

Specify Cartesian or Polar according to the class of symmetry of anisotropy of thermal expansion or body force.

Related Topics
Thermal strain
External forces

## Allowable Stresses

Allowable stresses are only used in postprocessing stage to calculate the Mohr-Coulomb, Drucker-Prager, and Hill criteria. You don't need to define allowable stresses, if these criteria are of no interest to you. To define different components, first check the Anisotropic box.

Coordinates

Have sense for orthotropic materials. Specify Cartesian or Polar according to the class of symmetry of anisotropy.

Related Topics
Calculated physical quantities