Residual stress simulation on Ansys

[weezy.darwin!]

Hello,

Just wondering how the effect of residual stress on any structure can be shown on ANSYS, any information will be appreciated!

 

[minger]

By residual stress do you mean like unloaded stress from a part that has exceeded the yield strength?

If so, then you'll need to do an inelastic analysis by defining material properties using something like the Multilinear Kinematic model, and then performing the fully load analysis. Then, create an additional load step and remove the loads, and solve again.

 

[Mech_Engineer]

If you mean residual stresses from a welding process, you need to model the weld beads (or weld "region") and do a thermal expansion/contraction analysis.

Basically there is no simple solution, and our answer will depend on what kind of residual stresses you're referring to.

 

[weezy.darwin!]

oh okay, that's helpful. i really appreciate it.

 

[weezy.darwin!]

Really i am generally looking into the "effect of residual stress on structural integrity", haven done the literature review and all, i was looking to back it up with a little not too complicated computer simulation to show this effects through ANSYS ...hope that explains it better.

 

[Mech_Engineer]

Residual stress caused by what?

 

[weezy.darwin!]

Residual stress caused by loading or reapeated loading leading to th material failure.

 

[minger]

Ah, that's much better. Then the residual stress is due to stresses above yield strength of the material.

See my post above for an inelastic analysis. Typically, you will run one cycle, and examine the stresses/strains and look on LCF curves or the like to determine life.

 

[JoelHenrik]

Ah, that's much better. Then the residual stress is due to stresses above yield strength of the material.

See my post above for an inelastic analysis. Typically, you will run one cycle, and examine the stresses/strains and look on LCF curves or the like to determine life.

Sorry for bumping this thread,but I've got a similar problem! I have a structure and did apply load in one loadstep, and the unloaded it in a second. The materialmodel is miso.
Is there some way to "export", or use, that deformed body with its res-stresses to an another Static structure analysis? I want to apply other boundery-conditions and some other loads.

Basically I first stamps/presses a steel plate, and then use that plat in an another construction, and I want to bring with the influence of the res-stresses and material hardening.

Best reg Henrik

 

[gholy1234]

Hi
I want to simulate residual stress caused by machining , in fact i need to simulate a planar residual stress.

thanks in advance.

 

[ahmedi811]

How can I model weld residual stress for K-Joint Tubular Joints in ANSYS?