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文章編號 :100026893 (2008) 0320763206
Z2pin植入參數對 X2Cor夾層復合材料力學性能的影響
郝繼軍 ,張佐光 ,張蕾 ,李敏 ,孫志杰 (北京航空航天大學材料科學與工程學院 ,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夾層復合材料是一種新型的 Z2pin增強泡沫夾層結構 ,具有突出的比強度、
成型工藝 ,在不同的 Z2pin植入參數下制備了 X2Cor夾層復合材料 ,并對這種結構材料的平壓和剪切力學性植入方向等參數的影響規律。結果表明 ,Z2pin植入參數對 X2Cor夾層復合材料的平壓性能和剪切性能影響顯著。 X2Cor夾層復合材料平壓性能隨 Z2pin植入角度和植入密度時 ,X2Cor夾層復合材料平壓強度及模量最大 ;剪切性能隨 Z2pin植入角度的
時 ,剪切強度和模量最大 ;同時 ,X桁架的植入方向對剪切性能也有很大影響 ,相同 Z2pin植入密度下 ,沿試樣長度方向植入的 X桁架含量增加時 ,夾層復合材料的剪切模量增加 ;X2Cor夾層復合材料的平壓性能和剪切性能隨 Z2pin植入角度的變化規律相反 ,Z2pin植入角度在 60°～ 70°之間時 ,X2Cor夾層復合材料平壓性能與剪切性能均達到較高值。關鍵詞 :復合材料 ;夾層結構 ;力學性能 ;熱壓成型 ;Z2pin中圖分類號 : V258 ; TB332 文獻標識碼 :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
復合材料夾層板具有重量輕、高比剛度和高其復合材料夾層結構力學性能的研究報告 [6]。碳比強度等突出優點 [122] ,在飛機結構上有著廣泛應纖維 Z2pin以 X型交叉網架的形式穿透中間的泡用。現在普遍使用的復合材料夾層結構由高強度沫芯材 ,嵌入面板中 ,提高了面板與芯材的結合的上下蒙皮和充填其中的芯子所組成 ,通過粘結力。而且 ,由于網架結構的幾何特性 ,結構的抗劑或者模壓共固化將上下蒙皮與芯子膠結成為整剪、抗壓等性能也得到大幅度提高。這種新材料體剛性結構 [325]。2001年美國陸軍實驗室的 有助于降低飛機的結構重量 ,增大有效載荷 ,同時Kunkel和 Sikorsky飛機公司的 Carstensen等人高的抗損傷能力使飛機的維護成本也得以降低 ,先后發表了關于一種先進的夾層芯材 X2Cor及對于商業用途的大型客運、貨運飛機有著非常現
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