Effect of Squeezing Force on Stress and Fatigue of Aircraft Riveted Joints

What is it about?

This work investigates the relationship between different squeezing forces and static tensile strength and fatigue life of lap riveted structures. Also, considered the effect of the rivet material flow caused by different squeezing forces on static tensile strength and fatigue life of lap riveted structures. The theoretical prediction and the detailed finite element model results are verified by the experimental results. Especially for the microstructure of static tensile failure fracture and fatigue failure fracture are analyzed, and the failure mechanism is given. Due to the upsetting of the rivet rod caused by the squeezing force, there is a certain interference between the rivet rod and the rivet hole wall, and then a significant residual compressive stress is introduced on the rivet hole wall. When the external load is applied, the upsetting diameter of the rivet rod and the residual compressive stress on the rivet hole wall have a significant influence on the static tensile strength and fatigue life.

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