Stress linearization
Stress linearization
(OP)
Can the stress linearization method (ASME Section VIII Div 2) be used for analyzing components which do not form pressure boundary parts? For example if a FEA is done on a shaft with a torque acting on it ,and there are some local stress concentrations in the shaft, then can I use the method described under the elastic analysis to see if the component will fail or not?





RE: Stress linearization
The procedures in the ASME Code are designed for Protection Against Plastic Collapse and Protection Against Failure from Cyclic Loading - Ratchetting. And Protection Against Plastic Collapse is based on thin-shell theory for Pressur vessels.
RE: Stress linearization
RE: Stress linearization
With respect to the elastic-plastic method, the load factors used in the current edition of the ASME Code are specific to Division 2 pressure vessels with the concurrent fabrication techniques and tolerances. For a non-VIII-2 application, you need to determine the appropriate load factors.
My recommendation: figure out the appropriate failure modes for your structure. Then determine appropriate design factors / load factors. Then, use an appropriate evaluation technique where you understand the assumptions. Then, go ahead and use it.