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*ELASTIC

Keyword type: model definition, material

This option is used to define the elastic properties of a material. There is one optional parameter TYPE. Default is TYPE=ISO, other values are TYPE=ORTHO and TYPE=ENGINEERING CONSTANTS for orthotropic materials and TYPE=ANISO for anisotropic materials. All constants may be temperature dependent. For orthotropic and fully anisotropic materials, the coefficients $ D_{IJKL}$ satisfy the equation:

$\displaystyle S_{IJ}=D_{IJKL} E_{KL},$ (102)

where $ S_{IJ}$ is the second Piola-Kirchhoff stress and $ E_{KL}$ is the Lagrange deformation tensor. For linear calculations, these reduce to the generic stress and strain tensors.


First line:

Following line for TYPE=ISO:

Repeat this line if needed to define complete temperature dependence.


Following lines, in a pair, for TYPE=ORTHO: First line of pair:

Second line of pair: Repeat this pair if needed to define complete temperature dependence.


Following lines, in a pair, for TYPE=ENGINEERING CONSTANTS: First line of pair:

Second line of pair: Repeat this pair if needed to define complete temperature dependence.


Following lines, in sets of 3, for TYPE=ANISO: First line of set:

Second line of set: Third line of set: Repeat this set if needed to define complete temperature dependence.

Example:

*ELASTIC,TYPE=ORTHO
500000.,157200.,400000.,157200.,157200.,300000.,126200.,126200.,
126200.,294.

defines an orthotropic material for temperature T=294. Since the definition includes values for only one temperature, they are valid for all temperatures.


Example files: aniso, beampo1.


next up previous contents
Next: *ELEMENT Up: Input deck format Previous: *DYNAMIC   Contents
guido dhondt 2008-07-31