Linearized Stress Output in Pressure Vessel Study
Linearized Stress Output in Pressure Vessel Study
(OP)
I am using COSMOSWorks Pro to evaluate a pressure vessel with combined temperature and mechanical loads. The software has a feature to get a linearized stress output across a section of interest and produces these nice graphics with the stresses plotted across the section distance. There are six graphs for X,Y,Z Normal stress, and XZ, YZ, and XY Shear stress. Each graph has a plot of membrane stress, membrane plus bending, and another trace titled "Stress Results". See an example at http://fil es.enginee ring.com/g etfile.asp x?folder=f 9cbd3e2-9e 0a-4bd1-ac 8d-45207f6 16c73& file=Stres s_Plot.JPG
I completely understand how to interpret the membrane and membrane + bending results, but I don't know what stress is represented by the "Stress Results" plot. Is this Peak Stress? Does anyone have experience with this feature? I would ask the software vendor, but we have not paid our maintenence fee for a year or so.
Thanks in advance,
Chuck
I completely understand how to interpret the membrane and membrane + bending results, but I don't know what stress is represented by the "Stress Results" plot. Is this Peak Stress? Does anyone have experience with this feature? I would ask the software vendor, but we have not paid our maintenence fee for a year or so.
Thanks in advance,
Chuck






RE: Linearized Stress Output in Pressure Vessel Study
I suppose this is some kind of equivalent stress. I say "some kind" because I have no way of understanding which combination criteria it is based upon (Von Mises? Trescà?...). Anyway, let's suppose the routine is compatible with ASME: then, the linearization is based upon Stress Intensity (Trescà-based). The "sterss results" you see are most probably the "raw" results obtained from the FE-solution, "membrane" and "membrane+bending" being the "interpreted" data.
Can't be more precise, as I don't use CosmosWorks.
Regards
RE: Linearized Stress Output in Pressure Vessel Study
corus