ACOUSTIC EMISSION MONITORING FOR DAMAGE EVOLUTION OF COMPOSITE BONDING REPAIR INTERFACE

Abstract

Abstract: Acoustic emission (AE) testing technology was used to monitor the process of damage evolution of glass fiber reinforced composite specimens with fiber breakage after repaired under four-point bending tests in real time. According to the statistical analysis method of acoustic emission signal, the influences of patch size on the repair effects were investigated. The results show that the failure modes of two kinds of patch specimens are mainly the patch interfacial cracking under bend loading. As the bonding repair area increases, the failure load of specimens increases. Compared with the specimen without defect, double failure load of repaired specimen was obtained when the length of patch is 90 mm. The damage and failure process of adhesive bonded repair specimen shows a good correlation with the corresponding acoustic emission characteristics, and the method of statistical description of acoustic emission signals could be effectively used to evaluate the micro-damage evolution behavior of adhesive bonded composite specimens.

Key words: composite material, patch repair, finite element analysis, acoustic emission, statistic analysis

CLC Number:

TB332

CHEN Wei-ye, HU Jie, LIU Guang-hui, ZHOU Wei. ACOUSTIC EMISSION MONITORING FOR DAMAGE EVOLUTION OF COMPOSITE BONDING REPAIR INTERFACE[J]. Fiber Reinforced Plastics/Composites, 2016, 0(7): 9-13.

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