Acoustic Emission Analysis of Composite Laminates under Low Velocity Impact

Abstract:

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One of the problems preventing the industrial application of composites is the lack of an efficient method to detect and discriminate among types of damage occurring during service. To solve this problem, low velocity impact experiments are carried out on T300/QY8911 composite laminates. And synchronously, the acoustic emission (AE) technique and impact monitoring systems were used to record the AE signals and the impact force. The damage evolution, damage modes and acoustic emission (AE) activity were easily detected and evaluated by the analysis of both AE waveform and impact load. In this way, the damage development process containing matrix cracking, delamination and fibers breakage is investigated. The energy release of damage are theoretically approximated and correlated with the AE energy. By the theory, the “high energy damage zone” is defined in the scatter diagrams of amplitude-frequency. It is easily to prove that the primary damage mode of “high energy damage zone” is delamination.

Info:

Periodical:

Advanced Materials Research (Volumes 118-120)

Edited by:

L.Y. Xie, M.N. James, Y.X. Zhao and W.X. Qian

Pages:

216-220

DOI:

10.4028/www.scientific.net/AMR.118-120.216

Citation:

H. Chen et al., "Acoustic Emission Analysis of Composite Laminates under Low Velocity Impact", Advanced Materials Research, Vols. 118-120, pp. 216-220, 2010

Online since:

June 2010

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Price:

$35.00

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