THERMAL EFFECT OF FATIGUE STRENGTH FOR FRP/METAL ADHESIVE JOINTS

摘要：

In this paper we developed the fatigue strength and fatigue life evaluation methods of FRP/Metal adhesive joints under low temperatures.Firstly we present fatigue strength and delamination propagation rate evaluation methods using two stress singularity parameters H and λ which express stress distributions at bonding edge or delamination edges as follows.τ(r) = H/rλHere τ(r) is stress (MPa),r is the distance (mm) from the singular point (bonding edge or delamination edge),H is the intensity of stress singularity,and λ is the order of stress singularity.Then the delamination propagation rates of the double lap joints under mechanical cyclic loadings at room temperature were measured.Using the relationship between the measured delamination propagation rates and the analyzed range of stress singularity intensity values we estimated the fatigue strength of embedded adhesive joints.And we can confirm that these estimated results coincided well with the experimental results.And then we performed fatigue test under LN2 temperatures,and present thermal effects evaluation methods of fatigue strength and delamination propagation rate by separating the residual stress effect and pure temperature effect independently.

关键词： Adhesive joints FRP Fatigue strength Stress singularity parameters

作者: T.Hattori

作者单位: Department of Mechanical and System Engineering,Gifu University,1-1,Yanagido,Gifu,Gifu,Japan

会议类型: 国际会议

会议名称: 第二届国际非均质材料力学会议(The Second International Conference on Heterogeneous Material Mechanics)

会议地点: 安徽黄山

会议语种:英文

页码: 1208-1212

在线出版日期: 2008-06-03（万方平台首次上网日期，不代表论文的发表时间）