复合材料胶补飞机损伤金属结构疲劳寿命分析

Analysis of Fatigue Life of Damaged Aircraft Metallic Structure Repaired with Single-Side Adhesively Bonded Composite

针对复合材料单面胶接修理飞机损伤金属结构疲劳寿命分析时,多种失效模式耦合作用、残余热应力和附加弯曲力矩以及裂纹非均匀扩展的影响,提出了一种能够综合考虑上述影响因素的复合材料修理损伤金属结构疲劳寿命评估方法。算例分析结果与试验结果吻合,表明本文方法可为复合材料单面胶接修理损伤金属结构疲劳寿命估算提供参考。

Considering the impact of coupling effect of several failure modes, residual thermal stress, ad ditional bending moment and crack ununiform propagation in fatigue life analysis for damaged aircraft metallic structure repaired with single-side adhesively bonded composite patch, a life evaluating method for the repaired structure is put forward. Analysis results of example are accordant with experimental results, which shows that the method can be used for preliminary analysis of fatigue life of damaged me- tallic structure repaired with single-side adhesively bonded composite patch.