关键词: 复合材料, 基体材料, 裂纹检测, 实验方法

Abstract: Three experimental techniques for detecting matrix cracking evolution in composite laminates are investigated: acoustic emission detection, ultrasonic wave C-scan, and replica tape record. In various test stages, the advantages of each test method should be fully used so that more test data can be obtained for each specimen than those in the regular tests, including acoustic emission hit response diagram, ultrasonic wave scanning image throughout the specimen width, and replica tape picture along the edge thickness. The first acoustic emission hit corresponds to the matrix cracking initiation during loading. Through the ultrasonic scan, this first matrix crack can be clearly identified. With the development of the matrix cracking, all the techniques are combined to determine the matrix fracture evolution. Based on the test results, these techniques are evaluated.