Membrane property is a physical property assigned to surface elements. This property can be applied on linear triangle elements (TR3), parabolic triangle elements (TR6), linear quadrangle elements (QD4) and parabolic quadrangle elements (QD8).
A membrane property references a material assigned to the surface part and describes a thickness associated to this surface part. A membrane property is associative to the geometry this property points at.
Associated to this property, elements (linear or parabolic triangle, linear or parabolic quadrangle) have:
- a plane stress state,
- two degrees of freedom per node (both translations in the finite element plane),
- no transversal stiffness,
- longitudinal shearing,
- tension / compression deformation.
The input and output characteristics are:
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Input:
-
Material
-
Thickness
-
-
Output:
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Stress
-
Strain
-
Point force vector
- Stress Von Mises
- Elastic energy
- Elastic energy density
- Estimated error
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Those characteristics can be expressed at the given positions in the elements and in different axis systems:
Position
Axis System
Characteristics
Center of element
Nodes of element
Gauss point
Global
Local
Stress
Strain
Point force vector
Stress Von Mises
Elastic energy
Elastic energy density
Estimated error
