How to constrain the surface to be traction free?
How to constrain the surface to be traction free?
(OP)
Hi Everyone,
I want to specify certain stress components to be zero at some surfaces. So I tried Loads -> Surface traction -> Magnitude=0 in the Edit Load dialog box. I got the error message "Load must be created with a non-zero magnitudes unless utilizing a user subroutine".
Is there any easy way to make certain stress components at the surface remain zero throughout the anaysis? Thanks!
I want to specify certain stress components to be zero at some surfaces. So I tried Loads -> Surface traction -> Magnitude=0 in the Edit Load dialog box. I got the error message "Load must be created with a non-zero magnitudes unless utilizing a user subroutine".
Is there any easy way to make certain stress components at the surface remain zero throughout the anaysis? Thanks!





RE: How to constrain the surface to be traction free?
If you check the stress components, with respect to the surface, (extrapolated) at the nodes they should be very close to zero if the material is elastic.
If the material undergoes permanent deformation near the surface then these stresses might have a small value (but higher than for the elastic material) in general due to high stress gradient in the elements near the traction free surface.
RE: How to constrain the surface to be traction free?
This is a composite material and I applied uniform deformation boundary condition. Therefore unwanted stress components develop at the surface due to the underlying heterogeneous structure. I want to constrain these unwanted stress components to be zero so that I can use Hook's law to calculate average elastic properties of the composite.
I want to specify a certain stress component to be zero all the time during the analysis. But I don't know how to do this.
RE: How to constrain the surface to be traction free?
RE: How to constrain the surface to be traction free?
....how about the shear component on the surface ?
RE: How to constrain the surface to be traction free?