胶铆混合修补铝合金板的疲劳性能研究

针对胶铆混合连接方式单面修补铝合金板的疲劳性能，设计了未修理、铆接修理、胶接修理和胶铆修理4种不同形式的试验件，对其进行了疲劳试验。建立了试验件的有限元模型，得到了结构应力分布，获得了裂纹长度-裂纹尖端应力强度因子（SIF）曲线，并与试验结果进行了对比。结果表明:胶接修理和胶铆修理能有效降低裂纹处应力水平及裂纹扩展速率，且相对于未修理试验件疲劳寿命分别提升184.3%和197.3%；胶铆修理中铆钉能抑制胶层脱黏，相比胶接修理方式修理质量更可靠有效；有限元分析（FEA）结果与试验数据吻合良好，SIF误差基本保持在8%以内。 

Fatigue performance of adhesive-rivet hybrid repair of aluminum alloy plate

Aimed at the fatigue performance of aluminum alloy plate with hybrid adhesive-rivet single-sided patch, specimens with four different methods including un-repair, riveted repair, adhesive repair and adhesive-rivet repair were designed and subjected to fatigue tests. The finite element models of specimens were established, and the structural stress distributions and the crack length-crack tip Stress Intensity Factor (SIF) curves were obtained and compared with the test results. The results show that adhesive repair and adhesive-rivet repair methods can effectively reduce the stress level at the crack and the crack growth rate. Compared with un-repair specimens, the fatigue life of adhesive repair and adhesive-rivet repair methods is increased by 184.3% and 197.3%, respectively. For the adhesive-rivet repair, the rivets can inhibit the debonding of the adhesive layer, and the repair quality of this method is more reliable and effective than that of the adhesive repair method. The Finite Element Analysis (FEA) results are in good agreement with the test results, and the SIF error of FEA is approximately within 8%.