论文部分内容阅读
某燕尾形榫连结构的分析表明叶盘榫齿/榫槽接触区边缘存在较高的应力梯度,接触应力的有限元解同网格疏密程度密切相关.通过建立一系列不同密度网格的模型,对此问题展开有限元建模分析,以改善接触应力的求解精度,同时深入讨论材料弹塑性对接触应力的影响.在弹塑性接触应力分析的基础上,采用断裂力学方法建立了榫连结构高应力梯度位置的破坏分析模型,判断裂纹的萌生及扩展方向,以进行结构的强度及寿命分析.
The analysis of a dovetail tenon-joint structure shows that there is a high stress gradient at the edge of the contact area of the leaf disc / mortise and tenon, the finite element solution of contact stress is closely related to the degree of grid density.Through the establishment of a series of different density grids Model, the finite element modeling analysis is carried out to solve the problem of contact stress resolution accuracy, and in-depth discussion of material elastic-plastic contact stress on the basis of the analysis of elastoplastic contact stress, the use of fracture mechanics established tenon Structure high stress gradient location of the failure analysis model to determine the initiation and propagation of cracks in order to carry out structural strength and life analysis.