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Engineering
Mechanical Engineering
Calculate the residual stress on a beam after bending
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[QUOTE="FEAnalyst, post: 6530568, member: 658802"] I was also wondering why the stress changes sign at the end of unloading. Here's what happens with normal stress in the middle part of the beam at each frame during unloading (contour plot is synchronized with stress-strain curve and the dark blue dot shows the current location on the curve): [ATTACH type="full"]287860[/ATTACH] [ATTACH type="full"]287861[/ATTACH] [ATTACH type="full"]287862[/ATTACH] [ATTACH type="full"]287863[/ATTACH] [ATTACH type="full"]287864[/ATTACH] In the last two frames stress has different sign. Maybe those pictures will let you interpret the behavior of this model. P.S. Unloading analysis step was realized in such a way that the load was removed gradually throughout this step allowing the beam to regain its shape (at least partially since there's also some permanent deformation). [/QUOTE]
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Calculate the residual stress on a beam after bending
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