Domain, Boundary, Edge, Point, and Pair Nodes for the Elastic Waves, Time Explicit Interface
The Elastic Waves, Time Explicit Interface has these domain, boundary, edge, and pair nodes, listed in alphabetical order, available from the Physics ribbon toolbar (Windows users), Physics context menu (Mac or Linux users), or right-click to access the context menu (all users). Continuity in velocity and stress is the default condition on interior boundaries. If a boundary separates two different materials the Material Discontinuity or Continuity (the pair version of material discontinuity) condition has to be applied to ensure the continuity in velocity and stress.
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.
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Axial Symmetry
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Antisymmetry
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Body Load
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Boundary Load
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Compute Displacement
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Continuity
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Damping
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Elastic Waves, Time Explicit Model
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Initial Values
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Fixed
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Fracture
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Free
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General Flux/Source
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General Interior Flux
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Low-Reflecting Boundary
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Material Discontinuity
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Prescribed Velocity
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Roller
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Symmetry
The Piezoelectric Material feature and the Mechanical Damping sub-feature are describe in the The Elastic Waves, Time Explicit Interface section.
In the COMSOL Multiphysics Reference Manual see Table 2-4 for links to common sections and Table 2-5 to common feature nodes. You can also search for information: press F1 to open the Help window or Ctrl+F1 to open the Documentation window.