芯材高度对三维中空夹芯复合材料低速冲击性能的影响
曹海建陈红霞
钱洪浩？
（1江南大学纺织服装学院，无锡214122）(2张家港市恒仕达纺织有限公司，苏州215600）
文摘选取芯材高度分别为5、6、7mm的三维中空夹芯复合材料为研究对象，采用落锤式低速冲击试验装置分别对上述材料进行8J能量的低速冲击测试，研究材料的低速冲击性能；利用Instron3385H型万能材料试验机分别测试上述材料受到低速冲击载荷前后的压缩强度，研究材料受到低速冲击载荷后的压缩损伤容限。结果表明：三维中空夹芯复合材料对低速冲击载荷比较敏感；随着芯材高度的增加，材料抗低速冲击性能有所增加；低速冲击载荷使材料的制余压缩强度大幅下降。
关键词三维中空卖芯复合材料，芯材高度，低速冲击性能，压缩损伤容限，万能材料试验机
中图分类号：TB332
D0I;10.3969/j.issn.10072330.2014.06.017
Influence of Pile Height on Low-Velocity Impact Properties of
ThreeDimensionHollow SandwichComposites
CAO Haijian'
CHEN Hongxia?
QIAN Honghao
(1 College of Textile and Clothing, Jiangnan University, Wuxi 214112)(2 Zhangjiagang Hengshida Textile Limited Company , Suzhou 215600)
Abstract Three dimension hollow sandwich composites (3D composites) with pile height of 5, 6 and 7 mm were selected as object of study. In order to study low-velocity impact properties of the 3D composites, low-velocity impact testing was conducted by using drop hammer low-velocity impact tester at energy of 8 J. In addition, compres-sive strength of the 3D composites before and after impacting was tested by using universal material testing machine( Instron 3385H) for studying compressive damage tolerance of the 3D composites suffering low-velocity impact loads. The results indicate that the 3D composites were sensitive to low-velocity impact loads. Low-velocity impact properties increased with the increase of pile height of the 3D composites. Residual compressive strength of the 3D composites declined sharply after suffering low-velocity impact loads. The results contribute to the optimal design of the 3D sand-wich composites.
Key wordsThree dimension hollow sandwich composites, Pile height, Low-velocity impact property, Compres-sive damage tolerance, Universal material testing machine
0引言
三维中空夹芯复合材料是一种新型的夹芯材料，国外称之为三明治结构（sandwichstructure）。该材料主要由100%的E-Class纤维织造而成，其三明治结构通过z向纤维整体连接织物的上、下两层面]。
收稿日期：20140523
三维中空夹芯复合材料具有优异的整体性能，克服了传统蜂窝、泡沫等夹层复合材料易分层、耐冲击性能差的缺点[2-3]。三维中空夹芯复合材料最早由荷兰的“parabeamBV"公司开发，目前已广泛用于大面积船身、机翼、油罐的夹层、各种地板、隔墙等(4-5)。
与大多数纤维增强复合材料一样，三维中空夹芯
基金项目：国家自然科学基金（51302110）；江苏省产学研前瞻性联合研究项目（BY2013015-31）
作者简介：曹海建，1979年出生，博士，副研究员，研究方向：纺织复合材料的研发及应用。E-mail;caohaijian@jiangnan.edu.cr
宇航材料工艺万方数据
http://www.yhclgy.com
2014年第6期
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