【摘要】 对车轴钢的短裂纹生长行为进行探讨，在大量疲劳实验的基础上，提出裂纹的生长原理和短裂纹行为的界限模型。利用该模型，给出了一种新的裂纹体寿命的计算方法，为短裂纹问题的工程处理奠定了一定的基础更多还原

【Abstract】 In this paper,the growing behaviour of a small crack has been studied. Based on a lot of fatigue experiments, the growing principle of crack and bound model of small crack behaviour are presented. By use of this model, a new calculation method of the life-span of the crack body are given, which lays a base for the engineering treatments of small cracks.更多还原