在Ⅰ型模式下异型截面Z-pin增强效果的数值分析  

Numerical Analysis of Reinforcement Effect of Z-Pins with Special-Shaped Cross-Section Under Mode Ⅰ Delamination

作　　者：金竹雨 张晓晶[1] 

机构地区：[1]上海交通大学航空航天学院,上海200240

出　　处：《上海交通大学学报》2016年第2期169-175,共7页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金项目(10602035)资助

摘　　要：针对单根Z-pin拔出试验以及未增强/Z-pin增强的双悬臂梁(DCB)试验建立了三维有限元仿真模型.在拔出试验的模拟过程中,以静-动摩擦系数模拟Z-pin在基体中的脱胶-拔出过程,以计算所得桥联力作为输入参数,通过连接器模拟Z-pin在层合板中的桥联作用,得到了DCB试验的载荷-位移曲线.同时,将所建模型用于计算异型截面Z-pin的桥联力,以及异型截面Z-pin增强DCB试件的载荷,以定量分析Z-pin截面周长对其增强效果的影响.结果表明,所建立的有限元模型的模拟结果与实验值较吻合.A 3Dfinite element model was proposed to simulate a single Z-pin for pull-out test and for unpinned/Z-pinned double cantilever beam（DCB）test.Static and sliding friction coefficients were used to simulate the debonding and pull-out process of the Z-pin.Connectors were used in the DCB model to simulate the bridging effect of the Z-pins with the bridging curves calculated by the pull-out model as input data.The bridging curves of the Z-pin with special-shaped cross-section for the pull-out test and the loaddisplacement curves for the DCB test were calculated based on the proposed finite element model.The effect of the cross section perimeter of Z-pin on the maximum bridging load was also discussed in detail.The simulation results were in good agreement with the experimental data.

关 键 词：异型截面Z-pin 桥联力 双悬臂梁试验 摩擦系数 连接器 

分 类 号：TB303.3[一般工业技术—材料科学与工程]