COMPOSITES SCIENCE AND ENGINEERING ›› 2024, Vol. 0 ›› Issue (3): 13-19.DOI: 10.19936/j.cnki.2096-8000.20240328.002

• BASIC STUDY • Previous Articles     Next Articles

Acoustic emission study on bending failure mechanisms of GLARE laminates with different stacking structures

ZHANG Mai, ZHENG Yingxiao, HU Kejun*, HAN Wenqin, DUAN Liuyang, SHI Qinghe   

  1. School of Materials Engineering, Jiangsu University of Technology, Changzhou 213001, China
  • Received:2023-03-24 Online:2024-03-28 Published:2024-04-22

Abstract: Glass fiber reinforced aluminum(GLARE) laminates are hybrid composite materials widely used in the aerospace industry. In this study, the three-point bending test method is used to carry out the bending loading, and the Acoustics Emission (AE) technique is used to monitor the real-time damage behavior of the laminates during the bending process, based on the multi-AE parameters and K-means clustering method, the bending performance and failure mechanism of GLARE laminate with different ply structures were investigated. The results show that the location of aluminum alloy layer has a significant effect on the bending properties of GLARE laminates, and the deformation coordination of the outermost aluminum alloy layer and the composite layer can effectively delay the initiation and evolution of the damage. The damage modes and corresponding peak frequencies of GLARE laminate during bending failure include 0~50 kHz for aluminum alloy damage, 80~210 kHz for matrix cracking, 210~320 kHz for fiber peeling and interface delamination, and 320~400 kHz for fiber breakage.

Key words: glass fiber reinforced aluminum laminates, acoustic emission technology, three-point bending experiment, K-means clustering method, failure mechanism

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