复合材料带填充钉孔层压板拉伸载荷下损伤特性分析

Damage characteristics analysis of composite laminates with filled nail holes under tensile load

复合材料填充钉孔层压板常用于机械连接设计中,考虑了开孔处的螺栓约束和层压板钉孔周边区域挤压变形的旁路失效问题,主要用于飞机复合材料结构的强度许用值设计,在航空航天等领域受到日益广泛的应用。为比较依据不同失效准则开展的复合材料带填充钉孔层压板拉伸损伤扩展失效特性,利用ABAQUS有限元软件,建立了二维和三维有限元模型,建模中考虑了材料非线性行为和失效判断等基本问题,基于Hashin准则和LaRC05准则对相应铺层顺序的含填充钉孔复合材料层压板进行了静态拉伸数值模拟,根据ASTM D6742进行了填充钉孔层压板单轴拉伸试验,将数值模拟结果与试验结果进行对比,数值模拟结果较好地模拟了含填充钉孔复合材料层压板的拉伸渐进失效模式,具有良好的工程应用意义。

Composite laminates filed with pin holes are often used in mechanical connection design.Considering the bolt constraint at the opening and the bypass failure of extrusion deformation in the area around the pin hole of the laminate,they are mainly used for the design of strength allowable values of aircraft composite structures,and are increasingly widely used in aerospace and other fields.In order to compare the tensile damage propagation failure characteristics of composite laminates with filled pin holes based on different failure criteria,two-dimensional and three-dimensional finite element models were established using ABAQUS finite element software.The nonlinear be-havior of materials and failure judgment were considered in the modeling.Based on Hashin criterion and LaRC05 criterion,the static tensile numerical simulation of composite laminates with flled pin holes in the corresponding stacking sequence was carried out.According to ASTM D6742,uniaxial tensile test of composite laminates with filled pin holes was carried out.The numerical simulation results were compared with the test results.The numerical simulation results simulated the tensile progressive failure mode of composite laminates with flled pin holes,which has good engineering application significance.