平纹编织C/SiC复合材料层合板面内力学性能的可设计性研究  

DESIGNABLE IN-PLANE MECHANICAL PROPERTY OF PLAIN-WOVEN C/SiC COMPOSITE LAMINATE

作　　者：李俊[1] 矫桂琼[1] 王波[1] 

机构地区：[1]西北工业大学工程力学系,西安710129

出　　处：《机械强度》2012年第2期229-233,共5页Journal of Mechanical Strength

摘　　要：通过试验和理论分析,研究平纹编织C/SiC复合材料层合板的面内承载特性。制备(0°/90°)主方向和(±45°)偏轴向试件,并分别进行室温下面内单向拉伸和剪切试验。试验结果显示平纹编织C/SiC复合材料层合板的力学性能与纤维方向角相关,(±45°)偏轴向试件的抗剪切破坏性能明显较高。基于微观结构的解析模型分析表明,孔洞和微裂纹的存在大幅度降低了SiC基体的有效弹性模量。经典层合板理论仍然适用于该材料类型层合板的刚度分析,从而证实碳纤维对层合板力学性能的控制作用。平纹编织C/SiC复合材料层合板的面内力学性能具备良好的可设计性。The in-plane load-carrying characteristic of plain-woven C/SiC composite laminate was studied through experiment and theoretic analysis.（0°/90°） on-axis and（±45°） off-axis specimens were fabricated and in-plane monotonic tensile and shear test were carried out on them.The experiment result shows a remarkable correlation between the mechanical property and fiber orientation,and the shear-damage resistance capacity of（±45°） off-axis specimens is observably better than（0°/90°） on-axis ones.Through the analytic model based on microstructure,it has revealed that the effective elastic modulus of SiC matrix is greatly lowered by pores and cracks.Classical lamination theory is still available to the stiffness analysis of plain-woven C/SiC composite material laminate,which has confirmed that carbon fiber is the dominant constituent of the laminate with respect to its mechanical property.As a conclusion,the plain-woven C/SiC composite laminate has favourable designable in-plane mechanical property.

关 键 词：C/SIC复合材料 力学性能 偏轴试验 孔洞 裂纹 单胞模型 

分 类 号：TB332[一般工业技术—材料科学与工程] O343[理学—固体力学]