单向拼接复合材料层合板的抗拉强度研究  

TENSILE STRENGTH OF UNIDIRECTIONAL LAMINATE WITH PLY-SPLICING

作　　者：李亮[1] 贾普荣[1] 矫桂琼[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》2013年第6期795-798,共4页Journal of Mechanical Strength

摘　　要：碳纤维增强树脂基复合材料层合板具有较高的抗拉强度,复合材料结构设计中会遇到含铺层拼接的层合板的问题,需要考虑拼接对层合板力学性能的影响。因此建立交错拼接单向层合板的力学模型,对其层间应力和承载能力进行分析,得到单向层合板拼接位置的层间应力分布和抗拉强度的解析解,并提出有效拼接长度的概念,可用于交错拼接层合板的设计。并建立不同拼接长度的交错拼接单向层合板模型,计算得到层间应力分布,并采用渐进损伤方法预测抗拉强度,解析解和有限元方法的强度预测结果均与试验结果具有较好的一致性。含交错拼接单向层合板拼接位置的层间切应力和抗拉强度决定于材料刚度、单层厚度、界面厚度和拼接长度。Carbon fiber-reinforced composite epoxy laminates have high tensile strength. Because ply-splicing may be used in the structural design of composites, the role of ply-splicing in the laminates＇ mechanics should be considered. The mechanical model was set to calculate the interface stress and the tensile strength. The effective length of interface was proposed for the strength design. The finite element analysis （FEA） models were built to simulate the mechanical behavior in the unidirectional composite laminate with different splice size. The stress in the interface and he strengths of different models were predicted through the progressive damage method. Both the analytical results and FEA （finite element analysis） results agreed well with the experimental results. Interlaminar stresses and tensile strength of unidirectional laminates with ply-splicing are determined by material stiffness, layer thickness, interface thickness and splicing length.

关 键 词：复合材料层合板 铺层拼接 抗拉强度 

分 类 号：TB332[一般工业技术—材料科学与工程]