Patran Results shows two values for shell in-plane shear component: XY component and XY Engr. Component. Why are there two shear components and which one should be used for shear stress calculation to be compared against material allowable shear stress?

0 Darrel Sinclair over 5 years ago

•Engineering vs.True/Tensor Strain Results

–Tensor Result Quantities

XY, YZ, & ZX Component vs. XY, YZ & ZX Engr. Component

–Patran translators convert Engineering strain values to Scientific (True/Tensor) strain values by dividing the shear strain components by 2, i.e., exy = gxy/2

•MSC Nastran calculates Engineering strain values

•Patran does this conversion (True/Tensor) to calculate other result components and to transform results into other coordinate systems

–To distinguish between “Engineering” and “True/Tensor” strain values, and to allow Patran to display the same results as the analysis code, the above 6 quantities were made available

•Keep in mind that these 6 quantities are shown whenever any tensor result is selected. Be aware that the Engineering Components are intended only for Shear Strains and no other results, such as Shear Stresses or Shell Forces.
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0 EKobylov over 5 years ago

Thank you, Darrel.
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