【摘要】 采用有限元分析软件ANSYS,在纯滚动运行状态下,对实际钢轨裂纹的扩展情况进行了模拟。结果表明:轮轨接触的疲劳裂纹为张开型和滑开型同时存在的复合型裂纹;随裂纹长度的逐渐增加,裂尖有效应力强度因子先减小后增大,裂纹扩展速率会出现先变慢后变快的现象。更多还原

【Abstract】 The finite element method software ANSYS was used to simulate the actual rail crack growth under the pure rolling state. The results show that the crack modes of wheel/rail contact include both the opening mode and the sliding mode; with the crack growth, the crack tip stress intensity factor first decreases and then increases, and the crack growth rate goes up first and then down.更多还原