Abstract This study experimentally analyzed the influence of squeeze force and initial fit tolerance on the fatigue property of a riveted aircraft lap joint. All specimens were prepared under load control and tested under six levels of fatigue loads. The results showed that an initially oversized rivet might be detrimental to fatigue-life improvement. Increasing the squeeze force within an allowable range could extend the fatigue life generally. A relative decrease was also observed at a higher range of squeeze force. A higher fatigue load was likely to weaken the effect of the interference fit. The reduced fatigue life at higher squeeze forces could be clearly explained in terms of the fretting characteristics on the faying surface as a result of different squeeze forces and load levels. This study suggests that, to fully extend the fatigue life of riveted lap joints, the influence of working fatigue loads must be considered in the structure design.

中文翻译：

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影响铆接飞机搭接接头中Al 2024-T3疲劳的设计变量：挤压力和初始配合公差

摘要 本研究通过实验分析了挤压力和初始配合公差对铆接飞机搭接接头疲劳性能的影响。所有试样均在载荷控制下制备，并在六个疲劳载荷水平下进行测试。结果表明，最初过大的铆钉可能不利于疲劳寿命的改善。在允许范围内增加挤压力，一般可以延长疲劳寿命。在较高的挤压力范围内也观察到相对减少。较高的疲劳载荷可能会削弱过盈配合的效果。由于不同的挤压力和载荷水平，接合面上的微动特性可以清楚地解释较高挤压力下疲劳寿命的降低。这项研究表明，