【作者】 黄龙男； 张东兴； 李地红；

【Author】 Longnan Huang~1,Dongxing Zhang~2,Dihong Li~2 (1 School of Materials Science and Engineering,Harbin Institute of Technology at Weihai,Weihai 264209; 2 School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001)

【机构】 哈尔滨工业大学(威海)材料科学与工程学院； 哈尔滨工业大学材料科学与工程学院；

【摘要】 为了保证在轨运行航天飞行器上的构件,在空间交变温度场环境下,安全有效工作,要求材料及其构件具有较高的热稳定性。材料的热膨胀系数是评价热稳定性能的重要参数。本文利用碳纤维和Kevlar纤维所具有的负热膨胀特性,采用细观力学和经典层合板理论,建立了混杂复合材料层合板面内二维热膨胀系数计算理论并分析了层合板的纤维含量、混杂比及其铺层角等对层合板热膨胀系数的影响规律。基于混杂复合材料层合板面内二维热膨胀系数计算理论的面内二维零膨胀系数混杂复合材料层合板设计软件的分析结果表明,合理设计复合材料层合板的纤维含量、混杂比及其铺层,可以实现面内二维零膨胀系数。论文设计出了几种典型面内二维零膨胀混杂复合材料层合板铺层及其弹性模量设计界限。更多还原

【Abstract】 The thermal stability of materials and their components is the key issue to secure that the components of the aerospace vehicle can work safely and effectively under the environment with a alternating temperature field in the space.The thermal expansion coefficient is an important parameter to describe the thermal stability of materials. In the present paper,a theoretical model to estimate the coefficient of the in-plane 2D thermal expansion of hybrid composites was proposed based on the mesomechanics and the classical laminate theory(CLT) by using the properties of negative thermal expansion of carbon fiber and the Kevlar fiber.The proposed model was applied to a laminate to study the influence of the concentration,the hybrid ratio,and the orientation angle of fibers on the thermal expansion coefficient.It was shown that the zero coefficient of in-plane 2D expansion could be achieved if equitably designing the fiber concentration,the hybrid ratio,and the laminate configure.Several special laminate configure of hybrid composites with zero in-plane 2D expansion were designed and their elastic modulus limitation was also estimated.更多还原