Principal Axis Inclination
Tips & Tricks
The function "Transform the principal axes such that Iu is always greater than Iv " allows you to adjust the position of the principal axes with the input. It is not necessary to rotate the cross-section by 90 °.
According to the formula above, only angles between +90° and -90° are possible. If internal forces for the cross-section are already defined with reference to the principal axes u and v, you can use another function to ensure that the position of the principal axes is kept when rotating the cross-section subsequently: "Keep the position of the principal axes relating to the section geometry when rotating the section". Thus, angles α greater than +90° or smaller than -90° are also possible.
Dipl.-Ing. (FH) Robert Vogl
Technical Editor, Product Engineering & Customer Support
Mr. Vogl creates and maintains the technical documentation. In addition, he is involved in the development of the SHAPE-THIN program and provides customer support.
Do you have questions or need advice?
Contact our free e-mail, chat, or forum support or find various suggested solutions and useful tips on our FAQ page.