Hello everyone, I have calculated the von Mises stress of a rectangular prism at 100°C (with x = 0 fixed), and validated the results using Ansys under the same conditions. The displacement results are quite accurate, but there is a significant difference in the von Mises stress results. Could anyone…

In general, the results depend on the mesh and the order of the elements. Additionally, as far as I know, ANSYS uses averaging to compute nodal stresses from the element stresses surrounding a node. In contrast, in your FEniCS results, the stress is constant across each element because you used a D…

Thank you for your reply. I am using exactly the same mesh, and the reason for the discrepancy is likely due to the different calculation methods you mentioned later. Is there any way to obtain consistent results, similar to the displacement results?

Thank you, I modified the method for calculating the Mises stress in ANSYS and obtained results that are quite close.

Thank you. After modifying the method for calculating the Mises stress in ANSYS, I further refined the mesh and obtained more accurate results.

The verification of thermoelastic von Mises stress

dolfinx

dokken November 20, 2024, 7:45am 4

Using P1 elements for displacement, any stressed does clearly not live in P1 (which is what Andys is using.

By refining your grid, you should get a result that looks more and more equivalent.

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The verification of thermoelastic von Mises stress

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