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Boundary condition in Weak Form PDE
Posted 2014年4月2日 GMT-4 07:47 0 Replies
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I'm trying to implement micropolar continuum in Weak Form PDE in COMSOL.
I want to implement a "sliding" bc between to interfaces.
It is easily done in Solid Mechanics module through "thin elastic layer". There I can set the stiffness to very high in say x-direction and set stiffness to zero in y-direction.
When I want to implement the same bc in Weak Form PDE, I look at equation view under "thin elastic layer" from Solid Mechanics module, I see two lines under "weak expression":
-1000*solid.uspring1_tel1*solid.d*test(up(u)-down(u))
and
0
I guess that the first line set the stiffness in x-direction to 1000, and the other line somehow sets the stiffness to zero in y-direction.
There is no information about the constraint force, and I've been trying to implement this weak expression as "weak contribution" and also "weak constraint" with no success.
Can anyone help?
Best regards,
Alexey
Hello Alexey Khlopotin
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