Confine "structuralBoundaryLoad" to a specific region of a face?

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Wesley Legant
Wesley Legant 2018-3-13
评论： Ravi Kumar 2018-3-19
I'm trying to apply a surface traction as in: https://www.mathworks.com/help/pde/ug/deflection-analysis-of-a-bracket.html
using: https://www.mathworks.com/help/pde/ug/pde.structuralmodel.structuralboundaryload.html
However, I don't want to apply the load the an entire face. I want to limit it to a specific region of the face (which ideally I can specify as the face of a particular element using the node references). Is this possible?

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回答（2 个）

Ravi Kumar
Ravi Kumar 2018-3-15
You can use the function_handle approach to define the load to act only on a portion of a Face. You can identify the portion of the face using the geometric coordinates that solver provides to the function you define. Take a look at the the documentation for using function_handle in defining boundary conditions - Solve PDEs with Nonconstant Boundary Conditions. Note that the document shows use of function_handle for applyBoundaryCondition the same approach would also work for structuralBoundaryLoad.
Wesley Legant
Wesley Legant 2018-3-19
Thanks Ravi. This is helpful, but not quite what I'm hoping to accomplish. I'm unclear what are the geometric coordinates that solver is feeding to my user function.
Do you know if there is a way to specify custom faces in the model? E.G. if I wanted to apply a load or boundary constraint only to a specific side of a single element. Ideally, I'd give the model a new "face" with the corresponding element/nodes and then just run everything that way. This is what I've done before in other FEM packages.
Thanks again.

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