旋压皮带轮的疲劳裂纹扩展寿命计算
发布时间：2018-07-18 16:26
【摘要】：基于线弹性断裂力学理论,利用Workbench有限元软件在旋压皮带轮拉应力最大处建立沿周向的初始裂纹的三维有限元模型,计算了该模型的裂纹前缘应力强度因子,得到旋压皮带轮以Ⅰ类为主的张开型裂纹类型结论;接着建立不同裂纹扩展模型,仿真计算得到各裂纹前缘的应力强度因子和应力强度因子幅;根据Paris经验公式和拟合后ΔK-a曲线计算,得到了旋压皮带轮裂纹扩展寿命。该计算裂纹扩展寿命的方法为旋压皮带轮的安全设计提供了一种新途径,具有积极的参考意义。
[Abstract]:Based on the theory of linear elastic fracture mechanics, a three-dimensional finite element model of the initial crack along the circumferential direction is established by using the Workbench finite element software at the maximum tensile stress of the spinning pulley. The stress intensity factor of the crack leading edge of the model is calculated. The conclusion of the type of open crack of spinning pulley is obtained, and the stress intensity factor and stress intensity factor amplitude of each crack leading edge are calculated by simulation. According to the Paris empirical formula and the fitted 螖 K-a curve, the crack propagation life of the spinning pulley is obtained. The method of calculating crack propagation life provides a new way for the safety design of spinning pulley and has positive reference significance.
【作者单位】： 龙岩学院机电工程学院;烟台南山学院;
【基金】：福建省中青年教师教育科研项目(JAT160488)
【分类号】：TH114
本文编号：2132484
[Abstract]:Based on the theory of linear elastic fracture mechanics, a three-dimensional finite element model of the initial crack along the circumferential direction is established by using the Workbench finite element software at the maximum tensile stress of the spinning pulley. The stress intensity factor of the crack leading edge of the model is calculated. The conclusion of the type of open crack of spinning pulley is obtained, and the stress intensity factor and stress intensity factor amplitude of each crack leading edge are calculated by simulation. According to the Paris empirical formula and the fitted 螖 K-a curve, the crack propagation life of the spinning pulley is obtained. The method of calculating crack propagation life provides a new way for the safety design of spinning pulley and has positive reference significance.
【作者单位】： 龙岩学院机电工程学院;烟台南山学院;
【基金】：福建省中青年教师教育科研项目(JAT160488)
【分类号】：TH114
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