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Solid Mechanics equation doesn't line up with documentation
Posted Nov 12, 2018, 4:04 PM EST Mechanical, Structural Mechanics & Thermal Stresses Version 5.3a 2 Replies
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I'm trying to better understand the workings of the solid mechanics module, and I came across an apparent discrepancy between the documentation and the module itself.
The momentum balance equation in the module itself (Solid Mechanics -> Equation) for a stationary solution is:
but according to the documentation, the correct equation is:
I feel like I must be missing something simple here. Does the solver assume that the strain is small, and therefore ? Or is there maybe one of the gradients in terms of the materials frame and one is not?