In order to simulate the actual working mechanism of the bolt more reasonably

based on the Kelvin displacement solution

certain assumptions are developed to analyze the load transfer principle of the bolt.Considering the distribution situation of the axial force along full length under pull-out wording state

the more accurate formula for calculating the shear stress is derived in elastic state.This calculation model is more reasonable for actual working conditions of the bolt.At the same time

various factors that affect the shear stress are clearly determined by the formula.Finally

an example is presented to compare and discuss the characteristics of the shear stress distribution with different analytical methods

and it shows the rationality and practicality of the model.The results based on the model provide a reference for future bolt studying and designing.