复合材料Ⅱ型分层损伤演化声发射监测

复合材料科学与工程 ›› 2015, Vol. 0 ›› Issue (1): 54-58.

复合材料Ⅱ型分层损伤演化声发射监测

李亚娟, 周伟^*, 刘然, 张雪梅

河北大学质量技术监督学院,河北保定071002

收稿日期:2014-06-13 出版日期:2015-01-28 发布日期:2021-09-14
通讯作者: 周伟(1980-),男,博士,副教授,主要从事复合材料实验力学及无损检测方面的研究,zhouweihy@126.com。
作者简介:李亚娟(1989-),女,在读硕士研究生,主要从事复合材料声发射方面的研究,yajuanli1128@163.com。本文作者还有李志远和吕智慧
基金资助:
河北省自然科学基金(E2012201084)

ACOUSTIC EMISSION MONITORING ON MODE Ⅱ DELAMINATION DAMAGE EVALUATION OF COMPOSITE MATERIAL

LI Ya-juan, ZHOU Wei^*, LIU Ran, ZHANG Xue-mei

College of Quality and Technology Supervision, Hebei University, Baoding 071002, China

Received:2014-06-13 Online:2015-01-28 Published:2021-09-14

摘要/Abstract

摘要： 通过风电叶片复合材料Ⅱ型分层扩展力学性能实验,并借助声发射技术手段,研究复合材料[0/0]、[0/45]和[+45/-45]层间界面损伤演化特性。复合材料试件弯曲加载时,采用声发射实时监测整个分层损伤过程。结果表明,[0/0]复合材料分层试件裂纹扩展快、分层面积大、前沿平齐,不稳定扩展对应较多高幅值、长持续时间的声发射信号;受±45°方向纤维作用,[0/45]和[+45/-45]复合材料试件不稳定分层扩展前声发射撞击累积数较高,裂纹扩展相对缓慢,分层面积小,前沿不齐。复合材料分层损伤演化可分为预分层裂纹尖端区域微损伤累积和分层不稳定扩展两个基本的过程。

关键词: 风电叶片, 复合材料, 端部缺口弯曲试验, 分层损伤, 声发射

Abstract: In order to study the damage evolution of interlaminar interface [0/0], [0/45] and [+45/-45] in composites material for wind turbine blades, mode Ⅱ delamination growth experiment of the composites has been conducted by means of acoustic emission technique. In this flexural experiment, real-time acoustic emission monitoring was used during the entire delamination process and the delamination growth. The results show that high speed crack extension, large delaminated areas and planar crack front are obtained for [0/0] layered composite specimen, and unstable crack extension is associated with high amplitude, long duration time acoustic emission (AE) signal. In the case of [0/45] and [+/-45] composite material specimen, delamination damage and extension are affected by the fibers along ±45 ° direction, and high AE cumulative hits before unstable crack extension, low crack propagation rate, small delaminated areas and irregular crack front are induced. The delamination damage evolution of the composites could be divided into two basic stages, the micro damage accumulation around crack tip region and delamination unstable extension.

Key words: wind turbine blade, composite, end notched flexure test, delamination damage, acoustic emission

中图分类号:

TB332

李亚娟, 周伟, 刘然, 张雪梅. 复合材料Ⅱ型分层损伤演化声发射监测[J]. 复合材料科学与工程, 2015, 0(1): 54-58.

LI Ya-juan, ZHOU Wei, LIU Ran, ZHANG Xue-mei. ACOUSTIC EMISSION MONITORING ON MODE Ⅱ DELAMINATION DAMAGE EVALUATION OF COMPOSITE MATERIAL[J]. COMPOSITES SCIENCE AND ENGINEERING, 2015, 0(1): 54-58.

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