Important Variables in the Solid Mechanics Interface

In each node in the physics interface, a number of variables are defined. In Table 4-17, you can find a list of variables that you as a user may want to use when, for example, creating your own variables and expressions. This list is far from exhaustive but contains some of the most commonly used variables. To see all variables defined by a certain node in the Model Builder tree, enable Equation View, and examine the contents in the node under each physics node in the Model Builder tree.

Table 4-17: Important variables in the Solid Mechanics interface
Variable	Description	Defined in	Comments
solid.disp	Total displacement	All materials1
solid.vel	Velocity magnitude	All materials1
solid.u_tX	Velocity, X component	All materials1
solid.acc	Acceleration magnitude	All materials1
solid.u_ttX	Acceleration, X component	All materials1
solid.eXX	Strain tensor, XX component	All materials1	Total (Green–Lagrange) strain in global directions. See also Deformation Measures.
solid.el11	Strain tensor, local coordinate system, 11 component	All materials1	Total strain in the local directions.
solid.eel11	Elastic strain tensor, local coordinate system, 11 component	All materials1
solid.eeldev11	Deviatoric elastic strain tensor, local coordinate system, 11 component	All materials1
solid.eiel11	Inelastic strain tensor, local coordinate system, 11 component	All materials1	See also Inelastic Strain Contributions.
solid.FdxX	Deformation gradient, xX component	All materials1	See also Deformation Measures.
solid.Fdlx1	Deformation gradient, local, x1 component	All materials1
solid.J	Volume ratio	All materials1	Total relative volume change.
solid.Cel11	Elastic Cauchy–Green tensor, local coordinate system, 11 component	All materials1
solid.Jel	Elastic volume ratio	All materials1	Elastic relative volume change.
solid.Ldxy	Rate of strain tensor, xy component	All materials1	See also Strain Rate and Spin.
solid.Lwxy	Spin tensor, xy component	All materials1	See also Strain Rate and Spin.
solid.SXX	Second Piola–Kirchhoff stress, XX component	All materials1	See also Defining Stress.
solid.Sl11	Second Piola–Kirchhoff stress, local coordinate system, 11 component	All materials1
solid.SdevX	Deviatoric second Piola–Kirchhoff stress, X component	All material1	See also Invariants of the Stress Tensor.
solid.PxX	First Piola–Kirchhoff stress, xX component	All materials1	See also Defining Stress.
solid.sxy	Stress tensor, xy component	All materials1	Cauchy stress, See also Defining Stress.
solid.sdevx	Deviatoric stress tensor, x component	All materials1	Deviatoric Cauchy stress, See also Invariants of the Stress Tensor.
solid.mises	von Mises stress	All materials1	See also Invariants of the Stress Tensor.
solid.tresca	Tresca stress	All materials1	See also Invariants of the Stress Tensor.
solid.I1s	First principal invariant of stress	All materials1	See also Invariants of the Stress Tensor.
solid.I2s	Second principal invariant of stress	All materials1	See also Invariants of the Stress Tensor.
solid.I3s	Third principal invariant of stress	All materials1	See also Invariants of the Stress Tensor.
solid.II2s	Second invariant of stress deviator	All materials1	See also Invariants of the Stress Tensor.
solid.II3s	Third invariant of stress deviator	All materials1	See also Invariants of the Stress Tensor.
solid.RFx	Reaction force, x component	All materials1
solid.RMx	Reaction moment, y component	All materials1
solid.Tax	Traction (force/area), x component	All materials1

Table 4-17: Important variables in the Solid Mechanics interface

solid.disp

solid.vel

solid.u_tX