Z-pins 几何分布对其增强复合材料双悬臂梁Ⅰ型层间韧性的影响

孙先念; 刘书田

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Z-pins 几何分布对其增强复合材料双悬臂梁Ⅰ型层间韧性的影响

孙先念^1,,
刘书田²

1.
大连海事大学机电与材料工程学院, 大连 116026;
2.
大连理工大学工程力学系, 大连 116023

基金项目: 国家自然科学基金(10502010); 国家重点基础研究发展计划(973) 项目(2006CB601205)

详细信息

通讯作者:
孙先念,教授,研究方向为复合材料及其结构力学 E-mail:xsun@newmail.dlmu.edu.cn

中图分类号: TB332
计量
- 文章访问数: 1798
- PDF下载量: 873
- 被引次数: 0
出版历程
- 收稿日期: 2006-07-17
- 修回日期: 2006-10-30
- 刊出日期: 2007-06-15

Effect of Z-pins distribution on mode Ⅰ delamination toughness ofZ-pinned laminated double cantilever beam specimens

SUN Xiannian^1
,,
LIU Shutian²

1.
Elect romechanics and Materials Engineering College, Dalian Maritime University, Dalian 116026, China;
2.
State Key Laboratory of St ructural Analysis for Indust rial Equipment s, Department ofEngineering Mechanics, Dalian University of Technology, Dalian 116023, China

摘要

摘要: 复合材料Z-pinning 增强技术通过在层合板内嵌入体分比小于5 %的Z-pins , 能大幅度提高层合板的层间断裂韧性, 减少因低能量冲击所产生的分层损伤。本文作者基于细观力学模型, 构造了相应的Z-pin 单元; 结合梁单元, 建立了用于分析含Z-pins 的双悬臂梁(Double cantilever beam , DCB) 的有限元模型; 在分层裂纹面上引入接触单元以防止分析过程中2 个分层子梁在分层前缘处的相互嵌入。通过数值算例分析了Z-pins 对层间韧性增强效果的影响及其原因。数值计算结果表明, Z-pins 的几何分布对其增强层间韧性的影响相对较小。
- Z-pinning /
- 复合材料 /
- 双悬臂梁 /
- 层间韧性
Abstract: With less than 5 % volume f raction of through2thickness Z-pins insertion , the delamination toughness ofZ-pinned laminates can be improved significantly and the delamination area induced by low-energy impact can also bereduced greatly. Based on the currently available Z-pin micro-model , a Z-pin element was developed and a beam element model for Z-pinned double cantilever beam (DCB) specimens was proposed in this paper to study the effect ofZ-pins dist ribution on the mode Ⅰdelamination toughness of Z-pinned DCB specimens. A contact element is also int roduced to the proposed model to avoid the unrealistic penet ration of the two subst rate beams at the delaminationcrack tip. The numerical results show that the Z-pin distribution has an insignificant effect on the mode Ⅰdelaminationtoughness of the Z-pinned laminated DCB specimens.
- Z-pinning /
- composites /
- double cantilever beam (DCB) /
- delamination toughness