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Hi @Jouher
Not sure what you mean by at PREPROCESSING stage means, but FBD is also used to extract cross-sectional resultant forces and moments (typically at the centroid of a cross-section) for use in traditional strength calculations.
Hello @Jouher,
Greetings!!
When you say preprocessing stage, do you mean applying a pre-load to a component/part?
If that's the case, you might want to look into the topic of explicit dynamic relaxation.
http://ftp.lstc.com/anonymous/outgoing/jday/bolt_preload3.pdf
If you are using LS-Dyna, you can have created a output file, wherein you can extract the data before the actual simulation begins (i.e during pre-load period).
You can find something similar for RADIOSS I believe. (>DYREL option)
Please, let us know, if you find a proper solution.
Hi,
You can use Free body diagram module to calculate shear force and bending moment. Please refer to OptiStruct help for more details on the same.