Rubber material is non-linear, hyper-elastic and incompressible. Its complex mechanical properties increase the difficulties of the theoretical calculation in large deformation. As the development of computing capacity and optical sensors, DIC (Digital Image Correlation) method has become an important method in measuring large deformation of rubber material. In this paper, DIC method was used to measure different depth of burial defective rubber in tensile test, the result, however, failed to test the burial defects of rubber sheet. In order to explore the failure mechanism, the finite element simulation test is completed using Mooney-Rivlin material model of two parameters. The undetected phenomenon is caused by rubber’s hyper elasticity and low-rigidity. The results show that DIC method can be effectively applied to the measurement and evaluation of mechanical properties of rubber-like material’s surface defects, but not its burial defects. The fact that DIC method is unable to detect the burial defects of rubber sheet should be paid more attention.
Experimental Study on the Heterogeneity of Mechanical Properties of Friction Stir Welded Joints with the Digital Image Correlation Method
