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Little Surface to apply a force
Posted Jan 17, 2022, 10:02 a.m. EST 1 Reply
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Hello everyone, someone knows how to create a primitive area on a plate on which apply the force? In other words I don't want to apply the force on a point but on an area. Thank you in advance!
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Maybe it is even easer to apply the load on a small area that is not part of the geometry? Use a boundary load / face load with an expression like
10[MPa]*(X>X_min)*(X<X_max)*(Y>Y_min)*(Y<Y_max)
for a rectangular patch
or
10[MPa]*(((X-X_c)^2+(Y-Y_c)^2)<R_patch^2)
for a circular patch.
Note that when using mesh independent loads like this, it can be a good idea increase the integration order for the load; see the discussion in https://www.comsol.com/blogs/introduction-to-numerical-integration-and-gauss-points.
You can even distribute the force over the patch, like in the first example in https://www.comsol.com/blogs/how-to-make-boundary-conditions-conditional-in-your-simulation.
-------------------Henrik Sönnerlind
COMSOL