The Linear Elastic Material node adds the equations for a linear elastic solid and an interface for defining the elastic material properties.
By adding the following subnode to the Linear Elastic Material node you can incorporate damping effects; see
Damping.
The Global coordinate system is selected by default. The
Coordinate system list contains any additional coordinate systems that the model includes (except boundary coordinate systems). The coordinate system is used for interpreting directions of orthotropic and anisotropic material data and when stresses or strains are presented in a local system. The coordinate system must have orthonormal coordinate axes, and be defined in the material frame. Many of the possible subnodes inherit the coordinate system settings.
Define the Solid model and the linear elastic material properties.
The Solid model is always
Isotropic for a linear elastic material that has the same properties in all directions.
The default Density ρ uses values
From material. For
User defined enter another value or expression.
For an Isotropic Solid model, from the
Specify list select a pair of elastic properties for an isotropic material—
Young’s modulus and Poisson’s ratio,
Young’s modulus and shear modulus,
Bulk modulus and shear modulus,
Lamé parameters, or
Pressure-wave and shear-wave speeds. For each pair of properties, select from the applicable list to use the value
From material or enter a
User defined value or expression.
According to Table 15-1, the elasticity matrix
D for isotropic materials is written in terms of Lamé parameters
λ and
μ,
Select the Calculate dissipated energy check box as needed to compute the energy dissipated by damping.
If Pressure formulation is used, select the discretization for the
Auxiliary pressure —
Automatic,
Discontinuous Lagrange,
Continuous,
Linear, or
Constant. If
Strain formulation is used, select the discretization for the
Auxiliary volumetric strain —
Automatic,
Discontinuous Lagrange,
Continuous,
Linear, or
Constant.
Select the Reduced integration check box to reduce the integration points for the weak contribution of the feature. Select a method for
Hourglass stabilization —
Automatic,
Manual, or
None to use in combination with the reduced integration scheme. The default
Automatic stabilization technique is based on the shape function and shape order of the displacement field.
When Shear stabilization is selected, enter a stabilization shear modulus,
Gstb. The value should be in the order of magnitude of the equivalent shear modulus.
When Volumetric stabilization is selected, enter a stabilization bulk modulus,
Kstb. The value should be in the order of magnitude of the equivalent bulk modulus.