三维间隔连体织物复合材料力学性能.pdfVIP

复 舍 材 料 亏 报 第25卷 第2期 4月 2008年 ∞ 伽： ∞ ‰ ∞ Vo1．25 No．2 April 2008 文章编号：1000—3851(2008)02—87～07 三维间隔连体织物复合材料力学性能 高爱君，李 敏 ，王绍凯，张佐光 (北京航空航天大学 材料科学与工程学院，北京 100083) 摘 要： 三维间隔连体织物复合材料是由纤维连续织造呈空芯结构的三维间隔连体编织物作增强体的新型轻质 夹层结构，具有整体性、轻质、可设计、低成本等特点。本文中对三维间隔连体织物复合材料增强体的结构特征 进行了分析，考察了材料在平压、剪切和三点弯曲载荷作用下的力学特性及破坏模式，并分析了织物结构参数对 复合材料平压、剪切、三点弯曲性能的影响。结果表明：随芯柱高度的增加，材料的压缩强度和剪切强度降低， 弯曲刚度增加；随芯柱密度的增加，材料的压缩强度、剪切强度和弯曲刚度都有大幅度的提高，且纬向剪切强度 和弯曲刚度都大于经向。研究结果为该类材料的结构优化设计和性能分析奠定了重要基础。 关键词： 复合材料；三维间隔连体织物；力学特性；夹层结构；芯柱 中图分类号： TB332 文献标志码：A Experimental study on the mechanical characteristics of 3一D spacer fabric composites GAO Aijun，LI Min ，WANG Shaokai，ZHANG Zuoguang (School of Materials Science and Engineering，Beijing University of Aeronautics and Astronautics，Beijing 100083，China) Abstract： The 3一D spacer fabric composite is a newly developed sandwich structure，which provides excellent properties like outstanding integrity，light weight，good designahility，low manufacturing cost，and SO on．The fabric reinforcement with the hollow core is produced using the advanced textile technology，and the two surfaces are mechanically connected with continuous vertical plies．In this paper，the structural characters of 3一D spacer fabric are analysed，the mechanical characteristics and damage modes of the 3一D spacer fabric composite under flatwise compressive，shear，and three points flexural loads are studied，and the effects of structural parameters on the mechanical properties were investigated．The results indicate that the compressive strength and the shear strength decrease，while the flexural stiffness increases with the increase of the pile height．The mechanical properties can be increased by raising the pile