Bolted joints are widely used in various industries for their simplicity and reliability,but the fatigue fracture of bolts is still a very prominent problem.Therefore,to accurately predict the bolt fracture failure life,the fatigue crack propagation experiments of bolt materials are conducted to obtain the fracture parameters of bolt materials,so that the Paris model can be established.Then the finite element method is applied with fatigue crack propagation experiments for calibration and achieves better results,which provides a basis for the calculation of the bolt fracture failure life.Finally,considering the influence of bolt pretension and transverse load on bolt fractures,a cracked bolt finite element model is established and the bolt failure life is quantitatively analyzed by the finite element method.The results show that the transverse load and bolt preload have a large effect on the stress intensity factor and bolt life.
bolt fracturefailure lifefinite element calculationtransverse loadquantitative analysis
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