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Forums
Engineering
Mechanical Engineering
Calculate the residual stress on a beam after bending
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[QUOTE="freddie_mclair, post: 6552775, member: 514429"] Hello everyone, I have finally modeled a bilinear elasto-plastic bending phenomena in ANSYS in order to cross-check my analytical calculation. By applying the bending moment I defined in the post above on a straight beam, and taking also all the mechanical and geometric properties I have defined in the previous post, I can say that the FEM values match very well the theoretical ones! From the analytical model, the residual stress profile across the cross-section of the beam is the following: [ATTACH type="full" width="585px" alt="Analytical 1.jpg"]290633[/ATTACH] From the ANSYS model, after applying the bending moment, the beam gets indeed bent, and after springback, I got the following shape and normal stress distribution in the zz direction: [ATTACH type="full" alt="Bending 3.png"]290634[/ATTACH] The cross-sectional residual stress distribution (in the middle of the beam) is: [ATTACH type="full" alt="Bending 2.png"]290635[/ATTACH] Then, finally, plotting the residual stress profile across a path of this cross-section I get: [ATTACH type="full" width="600px" alt="Bending 4.jpg"]290636[/ATTACH] Which matches very well with the first plot I have inserted here! Also, the max stress before removing the bending moment, matches very well the calculation. I got ##\sigma_max = 457.8\mbox{ MPa}##, and from ANSYS, during the bending process we see that the max value is similar: [ATTACH type="full" width="423px" alt="Bending 5.jpg"]290637[/ATTACH] [/QUOTE]
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Forums
Engineering
Mechanical Engineering
Calculate the residual stress on a beam after bending
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