Stress Linearization
Use the Stress Linearization node to define a line (stress classification line; SCL) along which a linearization of the stress state will be made. A number of result variables are created for each SCL. Add one Stress Linearization node for each SCL along which you want to compute linearized stresses.
When a Stress Linearization node has been added, you do not need to compute a new solution. It is sufficient to perform an Update Solution to make the variables for the new SCL available.
The line selection can consist of several edges, but they are assumed to form a straight line from one free boundary to another. For 2D and 2D Axisymmetric geometries, the only input is the line selection. For 3D, you also need to specify the orientation of the local coordinate system in which the linearized stresses are represented.
The Stress Linearization node is only available with some COMSOL products (see http://www.comsol.com/products/specifications/).
Second Axis Orientation
This section is present only in 3D. Here you specify the orientation of the local coordinate system in which the components of the linearized stress tensor are represented. The first direction is always along the SCL, and you indicate the second direction. The third direction is automatically formed by being orthogonal to the line and the second direction.
Select Reference point or Orientation vector. When a reference point is used, the second local direction will be in the plane formed by the SCL and the selected point. When an orientation vector is used, the second local direction will be directed in the plane formed by the SCL and the selected orientation. The orientation is always adjusted so that it is orthogonal to the SCL.
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For Reference point, select Defined by — Point or Coordinates. When Point is used, select the reference point in the Second Axis Orientation Reference Point section. When Coordinates is used, enter the coordinates for the reference point in the Reference point defining local 2 direction table.
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For Orientation vector select Defined by — Edge or Coordinates. When Edge is used, select an edge in the geometry as orientation vector in the Second Axis Orientation Reference Vector section. When Coordinates is used, enter the orientation vector manually in the Orientation vector defining local 2 direction table.
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Stress Linearization in the Structural Mechanics Modeling Chapter.
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Stress Linearization in the Structural Mechanics Theory Chapter.
Location in User Interface
Context Menus
Solid Mechanics>Variables>Stress Linearization
Ribbon
Physics tab with Solid Mechanics selected in the Model Builder tree:
Global>Variables>Stress Linearization