胶接接头胶层切应力测试新方法

Experimental Study on Shear Stress of Adhesive Joint Layer

理论分析表明胶接接头胶层切应力分布是不均匀的,但内部胶层的切应力理论结果至今还没有适当的测试方法进行试验验证。本文提出了胶层切应力测试新方法,通过测试接头盖板的正应力,拟合正应力分布方程推算出胶层切应力。试验结果与胶层切应力理论分析吻合,验证了胶接接头胶层切应力理论。

Adhesive joint theoretical analysis shows the uneven distribution of layer shear stress. Many theories are formed to describe this distribution. But a test method to verify its theoretical result is absent. This paper presents a new layer shear stress test method. Through testing the normal stress of lap joint specimen, equation of normal stress distribution can be fitted. And then, the distribution of shear stress in internal layer can be deduced. The test results show that the adhesive shear stress distribution is consistent with the theoretical values.