Effect of Repair Parameters on Shear Stress Distribution of Bondline for Composite Repair Structure
-
摘要: 复合材料胶接修理结构中,胶层起着传递载荷的作用,其应力状态对于修理效果有重要影响。本文中得到了修理结构中胶层的应力分布的解析解,与有限元数值结果吻合较好,表明该解析解合理有效。基于该解析解分析了胶层中的应力分布随修理参数的变化,结果表明:增加补片长度和厚度可以降低胶层中的剪应力,但是两者都有临界值,超过临界值后剪应力降低的趋势减缓;胶层中的剪应力随着胶层的厚度增加而减小,随着剪切模量的增加而增大。Abstract: For repairing the damaged structure with bonded composite patches, the bondline plays a role of transferring load, its stress state significantly affect the repair results. Both the analytical and numerical methods for forecasting the stress distribution in the bondline are developed in this paper. The analytical results was in a good agreement with the FEM result, which verified the validity of the present model. At last, the effect of the repair parameters on the stress distribution of the bondline was discussed. The results and their analysis showed preliminarily that the increase in patch length and patch thickness can slightly enhance the capacity of patch to share the load, the increase in thickness and the decrease in shear modulus of the bondline could decrease the shear stress.
-
Key words:
- bondline /
- composite /
- repair parameters /
- stress effect /
- theoretical analysis
-
[1] 徐建新.复合材料补片胶接修理技术的研究进展[J].航空学报,1999,20(4):381-383 Xu J X. Advances in the development of bonded repairs with composite patches[J]. Acta Aeronautica et Astronautica Sinica, 1999,20(4):381-383 (in Chinese) [2] 徐建新.复合材料胶接修理损伤金属结构的研究现状[J].力学进展,2000,30(3):415-424 Xu J X. Current status of studies on damaged metallic structures bonded with composite patches[J]. Advances in Mechanics, 2000,30(3):415-424 (in Chinese) [3] 刘国春,谢宗蕻,苏霓.复合材料胶接修补飞机金属结构技术的研究进展及关键技术[J].材料导报,2007,21(10):90-94 Liu G C, Xie Z H, Su N. Research progress and key technologies of bonded composite repair of metallic aircraft structures[J]. Materials Review, 2007,21(10):90-94 (in Chinese) [4] 程起有,姚磊江,童小燕,等.利补片尺寸对复合材料胶接修理性能的影响[J].飞机设计,2004,(3):31-33 Cheng Q Y, Yao L J, Tong X Y, et al. Influence of sizes patch on adhesively bonded composite structure strength[J]. Aircraft Design, 2004,(3):31-33 (in Chinese) [5] 李小刚,赵美英,万小朋.复合材料胶接修补参数优化研究[J].玻璃钢/复合材料,2010,(1):28-31 Li X G, Zhao M Y, Wan X P. Optimization of composite patch bonding repairing parameters[J]. Fiber Reinforced Plastics/Composites, 2010,(1):28-31 (in Chinese) [6] 赵培仲,黄旭仁,李艳丽,等.补片尺寸对胶层应力分布的影响[J].玻璃钢/复合材料,2012,(6):18-22 Zhao P Z, Huang X R, Li Y L, et al. Effect of the patch size on the stress distribution of the bondline[J]. Fiber Reinforced Plastics/Composites, 2012,(6):18-22 (in Chinese) [7] 严沾谋,游敏,余海洲,等.胶粘剂弹性模量对铝合金单搭接接头应力应变分布的影响[J].航空材料学报,2006,26(4):39-42 Yan Z M, You M, Yu H Z, et al. Influence of elastic modulus of adhesive on the stress and strain distribution in aluminum single lap joint[J]. Journal of Aeronautical Materials, 2006,26(4):39-42 (in Chinese) [8] 王中强,张开富,李原,等.CFRP/Al复合构件胶接界面力学建模与强度分析[J].西北工业大学学报,2010,28(6):858-865 Wang Z Q, Zhang K F, Li Y, et al. An interface stress model for strength analysis of CFRP/Al (carbon fiber reinforced plastic/aluminum) composite component[J]. Journal of Northwestern Polytechnical University, 2010,28(6):858-865 (in Chinese) [9] da Silva L F M, das Neves P J C, Adams R D, et al. Analytical models of adhesively bonded joints-Part I: literature survey[J]. International Journal of Adhesion and Adhesives, 2009,29(3):319-330 [10] Zou G P, Shahin K, Taheri F. An analytical solution for the analysis of symmetric composite adhesively bonded joints[J]. Composite Structures, 2004,65(3-4):499-510 [11] 沈观林,胡更开.复合材料力学[M].北京:清华大学出版社,2006 Shen G L, Hu G K. Mechanics of composite materials[M]. Beijing: Tsinghua University Press, 2006 (in Chinese) [12] Duong C N, Wang C H. Composite repair: theory and design[M]. Oxford: Elsevier, 2007
点击查看大图
计量
- 文章访问数: 201
- HTML全文浏览量: 33
- PDF下载量: 7
- 被引次数: 0