Local System Results
Add a Local System Results node to create variables for common structural mechanics quantities having vector and tensor components oriented in a local coordinate system.
When a Local System Results node has been added, you do not need to compute a new solution. It is sufficient to perform an Update Solution () to make the new variables available for postprocessing.
Coordinate System Selection
Select a coordinate system defined under Definitions from the list. Only coordinate systems with orthonormal axis directions will be shown.
Table 4-16: Quantities Transformed By Local System Results.
Quantity
Variable Name
Example
Displacement
<interface>.<tag>.<dofname>i
solid.lsr1.u1
Velocity
<interface>.<tag>.<dofname>_ti
solid.lsr1.u_t1
Acceleration
<interface>.<tag>.<dofname>_tti
solid.lsr1.u_tt1
Cauchy Stress
<interface>.<tag>.slij
solid.lsr1.sl12
Total strain (Green–Lagrange)
<interface>.<tag>.elij
solid.lsr1.el12
Elastic strain
(Green–Lagrange)
<interface>.<tag>.eelij
solid.lsr1.el12
Elasticity matrix
<interface>.<tag>.Dij
solid.lsr1.Dl12
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If you have selected a local coordinate system in a material model, stress and strain tensors in the corresponding local directions are always available.
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For more general transformations, and to transform other quantities than those supplied by Local System Results, you can use Vector Transform or Matrix Transform.
Updating a Solution in the COMSOL Multiphysics Reference Manual.
Location in User Interface
Context Menus
Solid Mechanics>Variables>Local System Results
Multibody Dynamics>Variables>Local System Results
Solid Rotor>Variables>Local System Results
Ribbon
Physics tab with Solid Mechanics, Multibody Dynamics, or Solid Rotor selected in the Model Builder tree:
Global>Variables>Local System Results