玻璃钢/复合材料 ›› 2009, Vol. 209 ›› Issue (1): 3-6.

• 基础研究 •    下一篇

基于声发射技术的PE/PE层合板拉伸破坏机理分析

  

  1. (纺织面料技术教育部重点实验室,东华大学纺织学院,上海201620)
  • 出版日期:2009-01-28 发布日期:2009-01-25
  • 作者简介:王旭(1973),男,博士研究生,主要研究方向为复合材料损伤机理。

INVESTIGATION OF DAMAGE MECHANISMS OF PE/PE LAMINATES
BY ACOUSTIC EMISSION TECHNIQUE

  • Online:2009-01-28 Published:2009-01-25

摘要:

本文利用声发射技术,对PE/PE层合板拉伸破坏的声发射信号进行聚类和判别分析,考察了基本拉伸破坏形式的声发射特性和拉伸破坏机理。实验结果表明,大量细观破坏的复合发生、发展和累积造成材料的最终宏观断裂。从破坏过程的声发射信号分布来看,破坏过程的早期主要是来自界面和基体的细观破坏,信号数量大但破坏能量小,破坏过程的中期界面和基体破坏程度加剧,并伴随少量纤维断裂,破坏过程的后期主要是纤维的整体断裂,信号数量小但破坏能量大。

关键词: 层合板, 声发射, 聚类, 判别, 损伤演化

Abstract:

The main purpose of this paper is to investigate the acoustic emission (AE) property of PE/PE laminates as well as tensile rupture mechanism AE signals were processed by the method of clustering and discriminance From the discussion, the conclusion can be listed as follows: the main reason of macrodamage is that lots of and different kinds of microdamages were generated simultaneously According to distribution of AE signals, early micro damages with large number and small energy mainly come from interface and matrix, then damage grade increased and accompany with a little bit fiber fractured, finally, main damages with small number but large energy mainly come from fiber fractured together.

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