中文摘要：

一个平均失败索引方法为合成 out-of-plane 的张力的力量预言基于精确 FEA 被建议结合粘合剂的关节。基于简单、独立的最大的压力失败标准，失败索引被介绍描绘部件关上到他们的相应材料力量的应力的度。与简短负担转移分析，弱 fillers 是突出、进一步的详细讨论被执行。在与不同应力部件相关的平均失败索引之中的最大的价值被过滤代表批评表面的失败强度，它是任何一个二弄弯的上边表面或为合成关节的 fillers 的底部飞机。有不同材料系统，配置和上篮的三种关节的张力的力量被建议方法预言，相应实验被进行。在数字、试验性的结果之间的好协议给建议方法的有效性的证据。与存在费时间的力量预言方法相对照，建议方法提供快速估计复杂 out-of-plane 关节的失败的一个能力并且容易、方便广泛地在工程被利用。

英文摘要：

An average failure index method based on accurate FEA was proposed for the tensile strength prediction of composite out-of-plane adhesive-bonded π joints. Based on the simple and independent maximum stress failure criterion, the failure index was introduced to characterize the degree of stress components close to their corresponding material strength. With a brief load transfer analysis, the weak fillers were prominent and further detailed discussion was performed. The maximum value among the average failure indices which were related with different stress components was filtrated to represent the failure strength of the critical surface, which is either the two curved upside surfaces or the bottom plane of the fillers for composite π joints. The tensile strength of three kinds of π joints with different material systems, configurations and lay-ups was predicted by the proposed method and corresponding experiments were conducted. Good agreements between the numerical and experimental results give evidence of the effectiveness of the proposed method. In contrast to the existed time-consuming strength prediction methods, the proposed method provides a capability of quickly assessing the failure of complex out-of-plane joints and is easy and convenient to be widely utilized in engineering.