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文章编号 :100026893 (2008) 0320763206
Z2pin植入参数对 X2Cor夹层复合材料力学性能的影响
郝继军 ,张佐光 ,张蕾 ,李敏 ,孙志杰 (北京航空航天大学材料科学与工程学院 ,北京 100083)
Effects of Z2pin Inserting Parameters on X2Cor Sandwich Mechanical Property
Hao Jijun , Zhang Zuoguang , Zhang Lei , Li Min , Sun Zhijie
(School of Materials Science and Engineering , Beijing University of Aeronautics
and Astronautics , Beijing 100083 , China)
摘 要 :X2Cor夹层复合材料是一种新型的 Z2pin增强泡沫夹层结构 ,具有突出的比强度、
成型工艺 ,在不同的 Z2pin植入参数下制备了 X2Cor夹层复合材料 ,并对这种结构材料的平压和剪切力学性植入方向等参数的影响规律。结果表明 ,Z2pin植入参数对 X2Cor夹层复合材料的平压性能和剪切性能影响显著。 X2Cor夹层复合材料平压性能随 Z2pin植入角度和植入密度时 ,X2Cor夹层复合材料平压强度及模量最大 ;剪切性能随 Z2pin植入角度的
时 ,剪切强度和模量最大 ;同时 ,X桁架的植入方向对剪切性能也有很大影响 ,相同 Z2pin植入密度下 ,沿试样长度方向植入的 X桁架含量增加时 ,夹层复合材料的剪切模量增加 ;X2Cor夹层复合材料的平压性能和剪切性能随 Z2pin植入角度的变化规律相反 ,Z2pin植入角度在 60°～ 70°之间时 ,X2Cor夹层复合材料平压性能与剪切性能均达到较高值。关键词 :复合材料 ;夹层结构 ;力学性能 ;热压成型 ;Z2pin中图分类号 : V258 ; TB332 文献标识码 :A Abstract : X2Cor sandwich composite is a novel structure which is reinforced by inserting Z2pin in the thick2 ness direction , so that this sandwich structure has a high specific strength and specific stiffness. With dif2 ferent Z2pin inserting parameters , the X2Cor sandwich composites are prepared with hot press molding process. The effects of Z2pin inserting angle , inserting density and inserting direction on compression and shear properties are investigated. Results show that the Z2pin inserting parameters have great effects on X2 Cor sandwich composites. The compression properties of X2Cor sandwich composites are improved by the increase of Z2pin inserting angle and density. The shear properties decrease with the increase of Z2pin inser2 ting angle , and the shear strength and modulus reach the largest when the Z2pin inserting angle arrived 45°. Moreover , the direction of X2truss is very important to shear behavior. The shear modulus is in2 creased with the increase of X2truss in longitudinal direction. Although the effect of inserting angle on the compression performance is contrary to that on shear behavior , both of them can reach higher values when the inserting angle is between 60°and 70°.
Key words : composite; sandwich structure; mechanical property; hot press molding; Z2pin
复合材料夹层板具有重量轻、高比刚度和高其复合材料夹层结构力学性能的研究报告 [6]。碳比强度等突出优点 [122] ,在飞机结构上有着广泛应纤维 Z2pin以 X型交叉网架的形式穿透中间的泡用。现在普遍使用的复合材料夹层结构由高强度沫芯材 ,嵌入面板中 ,提高了面板与芯材的结合的上下蒙皮和充填其中的芯子所组成 ,通过粘结力。而且 ,由于网架结构的几何特性 ,结构的抗剂或者模压共固化将上下蒙皮与芯子胶结成为整剪、抗压等性能也得到大幅度提高。这种新材料体刚性结构 [325]。2001年美国陆军实验室的 有助于降低飞机的结构重量 ,增大有效载荷 ,同时Kunkel和 Sikorsky飞机公司的 Carstensen等人高的抗损伤能力使飞机的维护成本也得以降低 ,先后发表了关于一种先进的夹层芯材 X2Cor及对于商业用途的大型客运、货运飞机有着非常现
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