摘要
运用有限元方法，分析了双向受载裂纹板胶接复合材料补片后，裂纹尖端的应力强度因子、补片内的最大拉伸应力和胶层内的最大剪切应力。没有补片时，平行于裂纹方向的拉压应力对裂纹尖端的应力强度因子没有影响。而裂纹板经复合材料补片胶接修补后，平行于裂纹方向的拉压应力对裂纹尖端的应力强度因子具有耦合效应，并且这种耦合效应的大小与补片的铺层含量有很大的关系。
Based on the finite element method, a numerical investigation into the bonded repair efficiency of cracked plates under biaxial loading is presented. The main considerations are: reduction in the Stress Intensity Factor (SIF) at the crack tip, the maximum tensile stress in the composite patch and the maximum shear stress in the adhesive bond between patch and plate. Without the patch, a tensile or compressive stress parallel to the crack would have no effect on the SIF at the crack tip. While with a composite patch, there exists coupling effect between the normal stress parallel to crack and the SIF, and the coupling effect is significantly dependent on ply orientation of the patch.
出处
《航空学报》
EI
CAS
CSCD
北大核心
1999年第4期351-354,共4页
Acta Aeronautica et Astronautica Sinica
基金
航空科学基金
博士后基金
