Do high frequency acoustic emission events always represent fibre failure in CFRP laminates?

被引：90

作者：

Oz, Fatih E. ^{[1
]}

Ersoy, Nuri ^{[1
]}

Lomov, Stepan V. ^{[2
]}

机构：

[1] Bogazici Univ, Dept Mech Engn, TR-34342 Istanbul, Turkey

[2] Katholieke Univ Leuven, Dept Mat Engn, Kasteelpk Arenberg 44, B-3001 Leuven, Belgium

来源：

COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2017年 / 103卷

关键词：

Polymer-matrix composites (PMCs); Acoustic emission; Transverse cracking; Delamination; DAMAGE; COMPOSITES; MECHANISMS; IDENTIFICATION; SIGNALS; EPOXY;

D O I：

10.1016/j.compositesa.2017.10.013

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

When damage in carbon fibre reinforced composites (CFRP) is monitored by acoustic emission (AE), it is a common belief that high frequency AE events originate from fibre failure. This shows that this statement may not correspond to the reality, and matrix cracks can emit high frequency AE signals. Quasi-static tension of [-45(2)/0(1)+45(2)/90(2)](5) laminates was monitored by AE, Digital Image Correlation (DIC) on the surface of the sample and in-situ optical microscopy on the sample's polished edge. Unsupervised k-means clustering algorithm was applied to the AE results. By comparison with the direct DIC and microscopic observations, the AE cluster with high frequency and low amplitude was found to correspond to directly observed matrix cracks. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：230 / 235

页数：6

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