压缩载荷下复合材料分层损伤演化声发射监测及应变分析

复合材料科学与工程 ›› 2015, Vol. 0 ›› Issue (9): 24-28.

压缩载荷下复合材料分层损伤演化声发射监测及应变分析

吕智慧, 刘然, 王雅瑞, 周伟^*

河北大学质量技术监督学院,河北保定 071002

收稿日期:2015-03-09 出版日期:2015-09-28 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:吕智慧(1990-),女,硕士研究生,主要从事复合材料力学及声发射方面研究。
基金资助:
河北省自然科学基金资助项目(F2015201215,E2012201084);河北大学2014-2015学年实验室开放项目(88)

ACOUSTIC EMISSION MONITORING AND STRAIN ANALYSIS OF COMPOSITE MATERIALS EMBEDDED WITH DELAMINATION UNDER COMPRESSION LOAD

LV Zhi-hui, LIU Ran, WANG Ya-rui, ZHOU Wei^*

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

Received:2015-03-09 Online:2015-09-28 Published:2021-09-14

摘要/Abstract

摘要： 通过单向玻璃纤维/环氧复合材料试件的单轴向压缩实验,结合声发射及应变电测技术,研究含直径分别为5mm和10mm两种圆形分层复合材料损伤演化特性,并探讨了试件的压缩损伤破坏过程。结果表明,在压缩载荷作用下,两类分层直径试件的破坏路径基本一致,层间破坏机理相同。分层缺陷面积的大小对试件的承载能力有较大影响,分层缺陷面积越大,试件的承载能力降低,试件的破坏程度加剧。载荷-纵向应变曲线由线性变化到近似线性变化再到非线性变化的过程与声发射信号分析结果较吻合。

关键词: 复合材料, 分层损伤, 压缩破坏, 声发射, 应变分析

Abstract: For the study of the damage evolution and failure process of composite specimens embedded with circular delamination, for which the diameters were 5mm and 10mm, respectively, the uniaxial compression test, acoustic emission (AE) monitoring and strain measurement of unidirectional glass fiber/epoxy composites were conducted. The results show that the delamination growth and the failure mechanism of two kinds of specimens with different delamination were similar under compressive loading. The area of delamination has great influence on the bearing capacity of specimens. The larger area of delamination, the lower carrying capacity and the more serious damage of the specimen are obtained. The load-longitudinal strain curve changes from linear to approximate linear to nonlinear. The change process was coincided with the analysis results of AE signals.

Key words: composite material, delamination, compression failure, acoustic emission, strain analysis

中图分类号:

TB332

吕智慧, 刘然, 王雅瑞, 周伟. 压缩载荷下复合材料分层损伤演化声发射监测及应变分析[J]. 复合材料科学与工程, 2015, 0(9): 24-28.

LV Zhi-hui, LIU Ran, WANG Ya-rui, ZHOU Wei. ACOUSTIC EMISSION MONITORING AND STRAIN ANALYSIS OF COMPOSITE MATERIALS EMBEDDED WITH DELAMINATION UNDER COMPRESSION LOAD[J]. COMPOSITES SCIENCE AND ENGINEERING, 2015, 0(9): 24-28.

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