magicme
Mechanical
- Sep 24, 2003
- 128
hi
i have results from an elastic analysis (using ANSYS)that indicates some regions of a structure go possibly 10ksi above the yield point under a certain load.
is there a sensible way to determine the residual stresses thoughout the structure after this load is removed (some material has yielded).
what i actually need to do is to determined the new unloaded distortion of the structure without doing a plastic analysis.
i am inclined to run the following elastic case..... apply a stress distribution to the structure (the original loads removed) that is shaped like the loaded stress distribution and that takes the yielded region to 10ksi. this inherently implies that the residual stress in the yielded region is 10 ksi and the surrounding stresses are proportional to the loaded case.
i believe this would be conservative, but would appreciate any comments.
plastic analysis is not an option.
thanks
daveleo
i have results from an elastic analysis (using ANSYS)that indicates some regions of a structure go possibly 10ksi above the yield point under a certain load.
is there a sensible way to determine the residual stresses thoughout the structure after this load is removed (some material has yielded).
what i actually need to do is to determined the new unloaded distortion of the structure without doing a plastic analysis.
i am inclined to run the following elastic case..... apply a stress distribution to the structure (the original loads removed) that is shaped like the loaded stress distribution and that takes the yielded region to 10ksi. this inherently implies that the residual stress in the yielded region is 10 ksi and the surrounding stresses are proportional to the loaded case.
i believe this would be conservative, but would appreciate any comments.
plastic analysis is not an option.
thanks
daveleo