基于子模型方法的钉群连接结构强度分析研究

为了准确高效的进行飞机复合材料钉群连接结构的损伤分析和强度预测，研究了子模型方法在复杂连接结构分析中的应用技术，构造了包括总体模型和两级子模型的钉群连接结构分析模型体系，提出了子模型中螺栓连接结构的建模策略和复合材料结构损伤模拟的方法，确立了对应于损伤模式的结构破坏判据。采用本文提出的方法对波音787复合材料壁板进行接...

Strength Analysis Approach for Multi-bolt Joints Based on Sub-modeling Technique

In order to analyze the failure characteristic and joint strength of the aircraft composites structure accurately and efficiently, a strength analysis approach for multi-boh joints based on sub-modeling method is presented in this paper. Model system composed of one overall model and two levels of suhmodels is proposed ac- cording to the characteristic of composite multi-boh joints and a new modeling strategy for bolted joints is introduced to build the detailed local sub-models. With these sub-models, progressive damage analysis is carried to predict the structure＇s failure modes, which can help to choose reasonable failure criterions for calculating structure strength. The presented approach is validated through a case study carried out about the failure and strength of Boeing 787 reinforced composite panel connection area, and the result shows that this new method is practicable and effectual in the multi-bolt joints strength analysis and can improve the computational efficiency of the analysis procedure significantly.