The Section Function feature is a way to define the shell thickness as a function of position. (As will be seen later, Mechanical APDL will automatically set this to 5 integration points to ensure better accuracy for creep calculations.) Shell offsets, if specified in Mechanical, will also appear in the Shell Sections dialog box shown on the previous slide. For this analysis, 3 integration points has been specified, although, in general, 5 integration points is preferred when creep or plasticity is present.
For nonlinear materials, better accuracy can be obtained by increasing the number of integration points through the thickness (shown on the previous slide is 3 integration points). Each layer can have a different material property ID number as well as different in-plane orientation ti angle. Click on to close the dialog box when done WS3-11ġ2 Review Shell Sections Some comments on shell sections: Note that multiple layers can be added with the button for composite shells. Review the section properties for the shell elements by selecting Main Menu > Preprocessor > Sections > Shell > Lay-up > Add/Edit The Shell Sections dialog box will appear, as shown below.
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