{"id":47835,"date":"2020-09-03T08:17:46","date_gmt":"2020-09-03T08:17:46","guid":{"rendered":"\/forum\/forums\/topic\/equivalent-stress-von-mises-is-higher-than-the-yield-strength\/"},"modified":"2020-09-03T08:17:46","modified_gmt":"2020-09-03T08:17:46","slug":"equivalent-stress-von-mises-is-higher-than-the-yield-strength","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/equivalent-stress-von-mises-is-higher-than-the-yield-strength\/","title":{"rendered":"Equivalent stress (von Mises) is higher than the yield strength"},"content":{"rendered":"
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Dear all,<\/p>\n

In order to understand, the Equivalent stress values, I have reduced my model with just 3 parts. <\/p>\n

It has a heating pipe, to which electricty is supplied and it is heated. The heating pipe is surrounded by insulator. The heating pipe is heated to 850 °C.<\/p>\n

Now I want to do the structural analysis, the bottom of the heating pipe is given an external displacement (all the values are zero). The deformation I got is around 4.5 mm and the Equivalent Von mises stress is over 100Mpa. <\/p>\n

I just want to understand, why this is hapennig? Is it because of the material properties? or is it because of the boundary conditions? <\/p>\n

It is a very simple geomentry, and I wish to get the Equivalent stress well below 3.4Mpa which is given in the material data sheet. <\/p>\n

Thank you<\/p>\n

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\n\"Geomentry.jpg\"
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