Issues regarding the calculation of composite steel plates
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For composite steel plates used in pressure vessel shells, if the laminate is not included in the calculated thickness of the shell, can the shear strength of the composite interface be ignored?
If the laminated layer of a composite steel plate is not included in the calculated thickness of the shell, according to the standards for composite plates, it is still necessary to take into account the shear strength at the composite interface, although the required value is lower.
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Generally, the shear strength of composite panels should be greater than 210 Mpa, as specified in the JB4733 standard for composite panels.
GB150 specifies that the shear strength of the composite interface shall not be less than 200 MPa. In other words, even if the lamination is not taken into account in the calculated thickness, as long as it is used in pressure vessels, it must meet the requirement that the shear strength at the composite interface should be no less than 200 MPa.