Hello all,

This is my first post on these forums, so I would like to say hello to everyone :-)

So far at our company we have done FEA (Linear Static) of structural assemblies involving bolts & nuts tightened to a specified preload torque - which is converted into tensile contact forces using the thread equation F=T/(0.2*D) and applied at the contact areas between each bolt with the contacting plate & each nut with the contacting plate.

However, I recently read in an internet article that the best way to simulate bolt preload in FEA is to perform a Non-Linear Analysis which takes into account thermal stresses induced in the members due to friction/tightening. I am interested in learning more about this, so could someone please tell me what it exactly means & which books or internet articles would you recommend us to study about non-linear themal analysis in detail?

This is my first post on these forums, so I would like to say hello to everyone :-)

So far at our company we have done FEA (Linear Static) of structural assemblies involving bolts & nuts tightened to a specified preload torque - which is converted into tensile contact forces using the thread equation F=T/(0.2*D) and applied at the contact areas between each bolt with the contacting plate & each nut with the contacting plate.

However, I recently read in an internet article that the best way to simulate bolt preload in FEA is to perform a Non-Linear Analysis which takes into account thermal stresses induced in the members due to friction/tightening. I am interested in learning more about this, so could someone please tell me what it exactly means & which books or internet articles would you recommend us to study about non-linear themal analysis in detail?

Solidworks simulation does all this for you in the static analysis.