Effect of Squeezing Force on Crack Propagation Life of Lap Riveted Structures

What is it about?

The strain energy release rate and crack tip stress intensity factor at different crack propagation stages were calculated with the virtual crack closure method, and the crack propagation life of lap riveted structures was estimated using the revised Paris formula.The finite element method is used to verify the changes of the plastic stress in the rivet hole region of the lap riveted structure with initial damage and the stress intensity factor of the crack tip. The influence of the squeezing force on the crack propagation life of the lap riveted structure with initial damage is proved by the crack propagation life test. The crack propagation path and crack propagation life of the specimens were analyzed by scanning electron microscopy (SEM).

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