CAJ | 학술논문

研究疲劳裂纹扩展机理以及评估结构疲劳强度的“单参数模型”和“双参数模型”对疲劳裂纹扩展的三个阶段—门槛值附近、稳定扩展阶段、失稳阶段的描述能力存在较大差别.文章就现今主流的以McEvily模型为源头的一系列单参数模型、双参数模型、统一模型以及正切模型进行了探讨,分析了这些模型对疲劳裂纹扩展的描述能力以及在疲劳寿命评估方面的差别.
연구피로렬문확전궤리이급평고결구피로강도적“단삼수모형”화“쌍삼수모형”대피로렬문확전적삼개계단—문함치부근、은정확전계단、실은계단적묘술능력존재교대차별.문장취현금주류적이McEvily모형위원두적일계렬단삼수모형、쌍삼수모형、통일모형이급정절모형진행료탐토,분석료저사모형대피로렬문확전적묘술능력이급재피로수명평고방면적차별.
One-parameter and two-parameter models for investigating fatigue crack propagation mechanism and assessing structural fatigue strength have large differences in describing the three phases of fatigue crack propagation including near threshold, stable propagation and unstable propa-gation. The purpose of this paper is to study a series of one-parameter models rooting in McEvily model, two-parameter models and tangential model, and make a comparison among these models about the describing ability of fatigue crack propagation course and assessment results of fatigue life.