残余热应力会增大裂纹尖端的应力强度因子SIF,加快疲劳裂纹扩展速率,缩短修补结构的疲劳寿命.利用三维有限元方法,对含裂纹金属板复合材料胶接修补结构中的残余热应力进行了分析,利用虚拟裂纹闭合技术(VCCT)计算了修复结构裂纹尖端的SIF.并以SIF为判据,讨论了补片铺层方向、固化温度、胶层的材料参数对修复结构残余热应力的影响.结果表明,[0°/45°/-45°/90°]s的铺层方式可有效降低残余热应力引起的SIF;残余热应力引起的SIF随着固化温度的升高而线性增加;胶层的材料参数及胶层厚度对残余热应力引起的SIF影响不显著.
参考文献
| [1] | A Albedah;B Bachir Bouiadjra;W Ouddad.Elastic plastic analysis of bonded composite repair in cracked aircraft structures[J].Journal of Reinforced Plastics and Composites,20111(1):66-72. |
| [2] | Oudad, W;Bouiadjra, BB;Belhouari, M;Touzain, S;Feaugas, X.Analysis of the plastic zone size ahead of repaired cracks with bonded composite patch of metallic aircraft structures[J].Computational Materials Science,20094(4):950-954. |
| [3] | 王清远;陶华.复合材料修补件的强度和疲劳性能[J].材料工程,2003(1):21-23,41. |
| [4] | 张移山;华庆祥.复合材料补片参数对裂纹尖端应力强度因子的影响[J].机械强度,2004(z1):100-103. |
| [5] | Wang CH.;Callinan R.;Baker AA.;Rose LRF..Thermal stresses in a plate with a circular reinforcement[J].International Journal of Solids and Structures,200033(33):4577-4599. |
| [6] | Duong CN.;Yu J..An analytical estimate of thermal effects in a composite bonded repair: plane stress analysis[J].International Journal of Solids and Structures,20024(4):1003-1014. |
| [7] | 王遵 .复合材料单面补强含裂纹铝合金薄板的残余热应力及其影响研究[D].国防科学技术大学,2007. |
| [8] | 梁重云 .复合材料与被修航空铝合金结构件的性能匹配性研究[D].国防科学技术大学,2002. |
| [9] | A. Albedah;B. Bachir Bouiadjra;L. Aminallah;M. Es-Saheb;F. Benyahia.Numerical analysis of the effect of thermal residual stresses on the performances of bonded composite repairs in aircraft structures[J].Composites, Part B. Engineering,20113(3):511-516. |
| [10] | Andrzej Leski.Implementation of the virtual crack closure technique in engineering FE calculations[J].Finite elements in analysis & design,20073(3):261-268. |
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