https://forums.autodesk.com/t5/robot-structural-analysis-forum/arbitrary-thin-walled-shape-stress-problem/m-p/5822772#M62126 <P>Let&nbsp;us try to be more concise.</P><P>&nbsp;</P><P>So, we have calculation model with many bars with thin walled cross section (made by RSAP tool) and we are interseting in following:</P><P>&nbsp;</P><OL><LI>Is there any way to obtain max/min stress&nbsp;in group of bars, group of points along bar,&nbsp;for group of load combinations?</LI><LI>Where we can find formula for thin walled&nbsp;SHEAR stress RSAP use for diagrams in "Stress Analysis - bars" module for thin walled cross sections?</LI></OL><P>Ad.1 - now we must export to EXCEL section forces far ALL bars, ALL load cobinations&nbsp; and&nbsp;ALL points of interest along bars - after that we MANUALLY make normal stress calculations using data from RSAP "Section definition" modul to find bar number, load case and point along bar for max/min stress - after that we EASY can reach all values in RSAP "Stress Anlysis - bars" modul (so, we can not automatic find bar/point/load for max/min values because such postprocessing is not avaliable - even ALL data we use for our "tip&amp;trick" already are in RSAP model database)</P><P>&nbsp;</P><P>Ad.2 - same "tip&amp;trick" as in "Ad.1" but for shear stress is not useful because it seem that our formula for shear stress is not the same like RSAP one - and we could not find RSAP formula for thin walled cross section shear stress in HELP system.</P><P>&nbsp;</P><P>Sincerely,</P><P>&nbsp;</P><P>User</P> Fri, 18 Sep 2015 09:29:39 GMT gliga 2015-09-18T09:29:39Z