螺栓连接层合板结构失效模式多尺度数值分析  

Multi-scale numerical analysis for the failure modes of pin-load composite laminate

作　　者：刘长喜[1] 周振功[1] 张博明[2] 唐占文[2] 王晓宏[3] 

机构地区：[1]哈尔滨工业大学复合材料与结构研究所,哈尔滨150008 [2]北京航空航天大学材料科学与工程学院,北京100191 [3]黑龙江工程学院机电工程学院,哈尔滨150030

出　　处：《哈尔滨工业大学学报》2014年第5期40-45,共6页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金资助项目(11272105)

摘　　要：为充分发挥螺栓连接层合板结构的力学潜能,构建宏-细观多尺度数值方法,从细观组分材料性能出发准确地预测结构的失效载荷,模拟局部损伤的产生、扩展过程,指导结构设计.基于有限元软件ABAQUS提供的用户自定义子程序(USDFLD),引入改进的单胞模型(GMC模型),建立考虑细观组分材料损伤/失效的宏-细观多尺度数值分析模型,模拟预报螺栓连接层合板结构在双剪切载荷作用下的损伤模式及挤压强度,模型的预报结果与文献及实验结果吻合较好,充分证明模型的预报能力.利用该模型进一步分析试件的几何尺寸对结构损伤模式及挤压强度的影响.结果表明:结构宽度与孔径比尺寸的变化对结构的损伤模式及挤压强度均有影响,且对挤压强度的影响较大,在结构的设计过程中应给予充分的考虑.To give full play to the mechanical potentiality of the pin-loaded composite laminate, the macromesoscopic multi-scale numerical method is developed to predict accurately the failure load of the structure, to simulate partial damage initiation, expansion and to guide the structure design. The improved unit cell model （GMC） is implanted to the numerical model by the user subroutines （USDFLD） provided by ABAQUS. The macro-micro muhi-scale numerical model considering the damage/failure of micro-constituent materials is created for the pin-loaded composite laminate based on the general finite element software ABAQUS. The failure modes and the extruding strength of the pin-loaded laminate structure under the double-shear loading are simulated and predicted. By comparing the simulated failure modes with the test results in the literature, and compare the limited load with the experimental results, the feasibility of model is verified. The effect of specimen geometry dimension on the failure mode and the limited extruding strength of pin-loaded laminate structure are analyzed. The change of the width-diameter ratio will affect the failure mode, the extruding strength of the pin-loaded composite laminate and especially for the extruding strength.

关 键 词：GMC模型 多尺度分析 螺栓连接层合板结构 损伤模式 ABAQUS 

分 类 号：TB33[一般工业技术—材料科学与工程]