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Residual Stress after Permanent Stress

thread404-478147

Residual Stress after Permanent Stress

Residual Stress after Permanent Stress

(OP)
Hi,

I have a case that the metal rod being bent to L shape and continue to pull it.

There is no heat treatment and there should be residual stress after bending into L shape. If I run two analysis separately, 1. plastic deformation to get the total strain;2. max stress/ strain when the L hook being pull, then sum up the total strain for assessment?

RE: Residual Stress after Permanent Stress

The approach is generally correct. But since you are applying a tensile force in the last step it is natural that you will calculate stress.This stress needs to be superimposed on the residual stresses with due regard to sign, i.e. tensile/compressive.

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