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How to apply traction free boundary on the top surface of a plate?

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alinalin

Mechanical
Joined
Nov 27, 2005
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36
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US

How to apply traction free boundary condition(stressxz,stressyz,stresszz are zero) on the top surface of a thin piezoelectric plate? Even if I apply zero value to Fx,Fy,Fz on the surface, I can still get nonzero value of stressxz,stressyz on this surface. Is there any way of applying shear force?
Thanks!
alin
 
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