Bolt Group Analysis
Bolt Group Analysis
(OP)
I'm looking for a theoretical treatement of bolt group analysis. I have seen allot of examples / theory on off axis shearing forces on a bolt group, although I am looking for an analysis where you would have a bolt group and you pull on it in tension eccentrically, and then calculate the resultant bolt loads. I believe the same method is used whether the applied load is off axis shear or off axis tension, although I have never seen a design example with off axis tension. I believe the two methods are the elastic method and center of rotation method.





RE: Bolt Group Analysis
RE: Bolt Group Analysis
This might help
http://www.roymech.co.uk/Useful_Tables/Screws/Bolt...
“Do not worry about your problems with mathematics, I assure you mine are far greater.” Albert Einstein
RE: Bolt Group Analysis
This method, whilst easy to calculate, is conservative. The principal of superpositioning is assumed for the translational and rotational actions of bolt groups in torsion when in reality these actions are dependent on each other. A method known as the Instantaneous Center of Rotation was developed to take this into account. A good description of the two methods can be found here. Link
A web based software tool can be used to find these forces for random bolt groups. This software can analyse both pre-loaded and non pre-loaded connections. It uses the more conservative elastic method for calculations. See link below.
Link
RE: Bolt Group Analysis