上海交通大学学报(自然版) ›› 2014, Vol. 48 ›› Issue (06): 877-882.

• 一般工业技术 • 上一篇    下一篇

复合材料层合板双面贴补结构渐进损伤分析

李振凯,余音,汪海
  

  1. (上海交通大学 航空航天学院,上海 200240)
     
  • 收稿日期:2013-07-19

Progressive Damage Analysis of Double-Sided Adhesively Bonding Repaired Structures of Composite Laminates

LI Zhenkai,YU Yin,WANG Hai
  

  1. (School of Aeronautics and Astronautics, Shanghai Jiaotong University, Shanghai 200240, China)
  • Received:2013-07-19

摘要:

提出了一种分析和预测在拉伸载荷作用下复合材料层合板双面贴补结构的极限承载能力的方法,建立了分析复合材料双面贴补结构渐进损伤的三维有限元模型.胶层用各向同性模型描述,提出了基于3个方向剪切应变描述的二次剪切失效判据来预测胶层的损伤起始,定义了与材料应力应变相关的刚度折减函数来模拟损伤后胶层刚度的连续退化.层合板用正交各向异性三维模型描述,采用基于应变描述的三维Hashin准则和Ye分层准则来预测其损伤起始,引入损伤变量来考虑层合板的损伤扩展.计算结果与试验数据吻合较好,说明该方法和模型可以有效地预测复合材料双面贴补结构的拉伸极限强度.
 
 

关键词: 复合材料, 双面贴补, 渐进损伤, 拉伸强度

Abstract:

A method for predicting and analyzing the ultimate load of the double-sided repaired structures of composite laminates subjected to tensile load was proposed. A three dimensional FEA model was established to analyze the damage process. The adhesive layer was modeled with the isotropic constitutive. A square criterion based on three direction shear strains to predict the occurrence of the damage of the adhesive layer, and a degradation function associated with the stress and strain was defined to degenerate the stiffness of the damaged material. The composite laminates was modeled with the orthotropic constitutive, and the occurrence of damage was predicted by 3D Hashin’s initiation criterion and Ye criterion. Damage variables was introduced to characterize the damage extension. The ultimate load obtained from the numerical prediction agreed well with the experimental results. It is verified that the method and model can predict the tensile ultimate strength of the double-sided repaired composite laminate structures effectively.
 

Key words: composite material, double-sided repair, progressive damage, tensile strength

中图分类号: