Research on the Influence of Rivet Arrangement on the Strength of Skin Repair
In response to the problem of crack damage in the daily use of the skin,LV12CZ aluminum plate and 2117AD copper aluminum alloy half round head rivets are used as materials to simulate the riveting repair and tensile process using finite element analysis.Experimental verification is conducted to explore the relation between different rivet arrangements,crack morphology and the strength of aircraft skin damage repair.The results show that the arrangement of rivets has a significant impact on the repair strength.The smaller the rivet distance,the higher the repair strength,while the influence of row distance on the repair strength is relatively small.The elliptical layout has the best repair strength,followed by the zigzag layout,and the circular layout is the worst.The crack morphology has a significant impact on the strength of riveting repair.The shorter the crack,the farther the distance between the crack stop hole and the rivet hole,the better the stress concentration,the higher the repair strength,and the crack expands in other directions;the longer the crack,the worse the repair strength.The width of the crack has a smaller impact on the repair strength when the rivet distance is small.When the rivet distance is large,the wider the crack,the higher the repair strength,and the crack propagates along the initial direction of the prefabricated crack.
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