Review of whole life process and engineering application of metal fatigue damage
The process of metal fatigue damage is complicated,and the fatigue damage mechanism,deformation characteristics and failure mode of metal under different load types and service environments are quite different.According to cycle life cycles,the whole life process of fatigue damage was divided into four categories:very high cycle,high cycle,low cycle and crack propagation.According to the deformation response characteristics and deformation mechanism characteristics,the research status and development trend of each type of fatigue damage were described,involving macro-scale,micro-scale and macro-micro multi-scale theoretical systems.At the same time,taking roll and dovetail as representative components,the fatigue damage behavior and influencing factors were analyzed based on engineering cases,and the application and challenges of fatigue theory in engineering practice were discussed,aiming to pro-vide theoretical basis and technical guidance for the improvement of metal fatigue damage life theoretical system and the health quality control of key components.
metal fatiguewhole lifemulti-scaleengineering practice
NETL
NSTL
万方数据
维普
