In this paper the mechanism of plastic fatigue crack growth (PFCG) was analyzed and an appropriate criterion was proposed. Elastic-plastic (incremental) finite-element method was used to study PFCG.
本文分析了裂纹塑性疲劳扩展的力学机理，提出了裂纹塑性疲劳扩展的判据。
This section will introduce the concept of Fracture Mechanics and initiation and growth mechanism of fatigue cracks, in particular, fatigue crack developed from welding defects.
本节将介绍结构断裂力学概念，礼炮裂纹的起始和生长机理。尤其是从焊接缺陷开始的疲劳。
The corrosive environment accelerates strongly crack growth of the composites. After acid and alkali treatment, the wear mechanism is the synthetic action of abrasive wear and fatigue fracture.
腐蚀环境对材料的裂纹扩展有较明显的加速作用，酸碱处理后材料的磨损机制主要是磨粒磨损和疲劳磨损的综合作用。
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