本文采用了高灵敏度的云纹干涉法对异质双材料粘接梁在弯曲载荷作用下的位移进行了测量，用局部杂交法对界面端部区域的应变和应力进行了计算．通过对该区域内的实验应力分析发现：拉应力是影响结构强度的关键因素．本文还对在基体材料表面近角点区域可能出现的龟裂破坏的原因进行了分析． In this paper, the displacement of the heterogeneous bimaterial bonded beam under bending load was measured by using the moiré interferometry with high sensitivity. The local hybridization was used to calculate the strain and stress in the end region of the interface. Through the analysis of the experimental stress in this area, it is found that the tensile stress is the key factor affecting the structural strength. The paper also analyzes the reason of possible cracking in the area near the corner of the substrate.