Domain, Boundary, Edge, Point, and Pair Nodes for Solid Mechanics

The Solid Mechanics Interface has these domain, boundary, edge, point, and pair nodes and subnodes (listed in alphabetical order), which are available from the Physics ribbon toolbar (Windows users), Physics context menu (Mac or Linux users), or by right-clicking to access the context menu (all users).

In general, to add a node, go to the Physics toolbar, no matter what operating system you are using. Subnodes are available by clicking the parent node and selecting it from the Attributes menu.

Features Available from Submenus

Many features for the Solid Mechanics interface are added from submenus in the Physics toolbar groups or context menu (when you right-click the node). The submenu name is the same in both cases.

The submenus at the Domain level are Material Models, Volume Forces, Mass, Spring, and Damper, and Domain Constraints.

The submenus at the Boundary level are Connections, Pairs, Mass, Spring, and Damper, and More Constraints.

There are also the Edges and Points submenus.

Note: Some submenus are only present with certain COMSOL products.

Force Loads

Note that you can add force loads acting on all levels of the geometry for the physics interface. Add a:

•	Body Load to domains (to model gravity effects, for example).

•	Boundary Load to boundaries (a pressure acting on a boundary, for example).

•	Edge Load to edges in 3D (a force distributed along an edge, for example).

•	Point Load to points (concentrated forces at points).

If there are subsequent constraints specified on the same geometrical entity, the last one takes precedence.

For 2D axisymmetric components, COMSOL Multiphysics takes the axial symmetry boundaries (at r = 0) into account and automatically adds an Axial Symmetry node to the component that is valid on the axial symmetry boundaries only.

• Body Load • Boundary Load • Change Thickness • Edge Load • Fixed Constraint • Free • Initial Values

• Linear Elastic Material • Periodic Condition • Point Load • Point Load (on Axis) • Prescribed Displacement • Ring Load • Roller

See Table 2-3 for links to common sections and Table 2-4 for common feature nodes. You can also search for information: press F1 to open the Help window or Ctrl+F1 to open the Documentation window.

The Damping subnode is available from Linear Elastic Material nodes.