Monitoring the Evolution of Crazing Damage in an Area under Stress Concentration via Acoustic Emission

Abstract

In this study, we designed a special stress concentration specimen. We studied the stress, strain, craze density, and the change trend in the rate of acoustic emission events in the area with the most intense craze damage. We also examined the evolution of crazing damage under continuous loading. We determined the one-to-one correspondence between crazing and the degree of triaxial stress, and used the finite element method to validate this correspondence. In addition, we analyzed the viscoelasticity area of the specimen and proposed the fracture criteria for crazes and microcracks.