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

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...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2017-12, Vol.283 (1), p.12011
Main Authors: Hao, M J, You, Q J, Zheng, J C, Yue, Z, Xie, Z P
Format: Article
Language:English
Subjects:
Acoustic emission testing
Acoustic mapping
Composite materials
Damage accumulation
Defects
Delamination
Evolution
Impact damage
Materials failure
Service life
Tectonics
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Summary: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.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/283/1/012011