Hi,
As per https://ansyshelp.ansys.com/account/Secured?returnurl=/Views/Secured/corp/v231/en/wb_sim/ds_Pretension.html
bolt pretensions can be applied to the straight edge of a line body.
would it be possible that in a deformed model the line bodies are slightly bent and not straight? Can you use beam connections or solid bodies for bolts instead?
-Aniket
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