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Residual Stress after Permanent Stress

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Lee.Conti

Lee.Conti

Automotive
Joined
Nov 8, 2019
Messages
87
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SG
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?

Pulling_rdgdn7.jpg
 
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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.

Engineers, think what we have done to the environment !
 
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