Research on stratified evolution of composite materials under four-point bending loading

6th Global Conference on Materials Science and Engineering

Hao, M.J.^1 ; You, Q.J.^2 ; Zheng, J.C.^2 ; Yue, Z.^1 ; Xie, Z.P.^1

Academy of Safety and Environmental Engineering, Capital University of Economics and Business, Beijing, China^1

Urban Systems Engineering Research Center, Beijing, China^2

关键词: Bending performance;    Composite layer;    Delamination defects;    Four point bending;    Four-point bending test;    Material failures;    Relative energies;    Service capacity;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/283/1/012011/pdf
DOI  :  10.1088/1757-899X/283/1/012011

来源: IOP

【 摘 要 】

In order to explore the effect of stratified evolution and delamination on the load capacity and service life of the composite materials under the four-point bending loading, the artificial tectonic defects of the different positions were set up. The four-point bending test was carried out, and the whole process was recorded by acoustic emission, and the damage degree of the composite layer was judged by the impact accumulation of the specimen - time-amplitude history chart, load-time-relative energy history chart, acoustic emission impact signal positioning map. The results show that the stratified defects near the surface of the specimen accelerate the process of material failure and expansion. The location of the delamination defects changes the bending performance of the composites to a great extent. The closer the stratification defects are to the surface of the specimen, the greater the damage, the worse the service capacity of the specimen.