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In STEEL, you can select the stress Sigma Delta for stress analysis. What is it used for?

Answer

For the sigma-delta stress, the maximum difference between the normal stresses is determined. This displays the existing difference between the stresses available in the different load cases. Therefore, the results tables only show an existing stress value, no corresponding load cases or design ratios.

If, for example, For example, if there are only members under pure tension loading, the difference between the smallest and the largest stress is displayed for Sigma Delta in terms of magnitude. Thus, the difference from different load cases can be determined.

The sigma-delta stresses can be used for a fatigue limit design.

Keywords

Impact resistance Fatigue design Sigma delta Difference

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RFEM Steel and Aluminum Structures
RF-STEEL 5.xx

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Stress analysis of steel surfaces and members

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