为提高复合材料层合板螺栓连接结构的可靠性和承载能力，基于ABAQUS软件及其提供的用户子程序，建立了结合改进的通用单胞模型（即GMC模型）的宏－细观多尺度数值分析方法。从细观组分材料分析层合板螺栓连接结构力学性能的影响因素。结果表明：准各向同性层合板螺栓连接结构的失效模式为挤压失效且该结构的挤压强度较高；此外，相同边径比 E／D 的连接结构，其挤压强度随宽径比 W／D 的增大而增大；当螺栓预紧力为4．2 N·m时，结构的承载能力趋于稳定值；适当的干涉配合能提高结构的承载能力；测试夹具的厚度应不小于3 mm，夹具内侧凸台的直径应为层合板开孔直径的2倍。%To improve the reliability and carrying capacity of the bolted⁃joint composite laminate structure, we devel⁃oped a macro⁃micro multi⁃scale numerical model that combines the improved general unit cell model ( GMC model) , based on ABAQUS and its user subroutines. We used this model to analyze the factors influencing the bearing strength of the bolted⁃joint composite laminate structure with respect to its mesoscopic composition material. The model results show that the failure mode of the quasi⁃isotropic bolted⁃joint composite laminate structure is extrusion failure and its crushing strength is high. In addition, the crushing strength of the bolted⁃joint composite laminate structure increases with increases in the width⁃to⁃diameter ratio ( W/D ) in bolted⁃joint structures that have the same edge⁃to⁃diameter ( E/D ) ratio. When the bolt pre⁃tightening force is 4.2 N·m, the bearing strength of the bolted⁃joint structure reaches a stable value. The bearing strength of the bolted⁃joint structure is improved by a proper interference fit. In addition, the thickness of the testing fixture should not be less than 3 mm and the diameter of the convex plate located inside the testing fixture should be two times the diameter of the hole in the composite laminate.
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