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本文叙述了一种能检测从裂纹萌生到剥落全过程的接触疲劳裂纹扩展的方法,建立了接触疲劳裂纹扩展曲线——裂纹长度A和循环次数N之间的关系.从这曲线上能测量出新的接触疲劳性能指标:孕育期N.、稳定扩展期N_1、快速扩展期入N_2和稳定扩展速率V_1,快速扩展速率V_2.这些性能指标对于深入研究内外因素对接触疲劳寿命的影响,对于明了接触疲劳剥落机理,对于评定各种材料、工艺和组织的接触疲劳性能都是很重要的.
This paper describes a method that can detect the contact fatigue crack growth in the whole process from crack initiation to exfoliation, and establishes the relationship between the contact fatigue crack growth curve - the crack length A and the number of cycles N. From this curve, we can measure The new contact fatigue performance index: inoculation period N., stable expansion period N_1, rapid expansion period into N_2 and stable expansion rate V_1, rapid expansion rate V_2. These performance indexes are of great significance for further study on the influence of internal and external factors on contact fatigue life Contact fatigue spalling mechanisms are important for assessing the contact fatigue performance of various materials, processes, and tissues.