复合材料单排多钉连接三维累积损伤强度分析

机械连接是复合材料结构的主要连接形式,针对复合材料层合板单排多钉双剪联接接头,建立了静拉伸三维累积损伤模型,考虑了多种最终失效判定准则;考虑了单排钉不同的几何尺寸。结合有限元技术即应力分析、失效判定准则、损伤后材料性能退化及机械连接最终失效准则,对复合材料机械连接接头部位在静载作用下的累积损伤失效过程及各钉孔孔径的变化过程进行模拟分析。用该模型预测的结果与试验结果进行了比较分析,数值分析结果与试验结果比较一致。

Three-Dimensional Cumulative Damage Strength Analysis of Single-Row Multiple Bolted Joint in Composite Laminates

Mechanical joint is the main connection type in composite material structures.A three-dimensional parametric cumulative damage model is built for multiple double-lapped fastener bolted joints in composite laminates subjected to static tensile loading.Many kinds of final failure criterions are considered.Different geometry sizes are considered.Damage accumulation in the laminate and the deformation process of the nail hole are simulated by integrating the finite element technique which includes stress analysis,failure analysis,material property degradation and final failure criterions.The numerical predictions agree well with the experimental data.