耐热钢CrMoCoV表面裂纹疲劳扩展试验及考虑闭合效应的数值分析研究  

Experimental and Numerical Studies on Fatigue Crack Propagation of Surface Cracks in Heat-Resistant Steel CrMoCoV Considering Closure Effect

作　　者：夏齐炜 宫建国[1] 轩福贞[1] 

机构地区：[1]华东理工大学机械与动力工程学院,承压系统与安全教育部重点试验室,上海200237

出　　处：《压力容器》2018年第2期1-7,共7页Pressure Vessel Technology

基　　金：国家自然科学基金项目(51325504);111计划项目(B13020);中央高校基础科研业务费项目(222201717005)

摘　　要：表面裂纹是高温结构服役过程中的常见缺陷形式,研究其在疲劳载荷下的扩展行为和规律是结构完整性评价的重要内容。开展了耐热钢CrMoCoV(FB2钢)含表面裂纹试样的疲劳试验,基于Zencrack软件,并考虑闭合效应修正进行了表面裂纹疲劳扩展的数值分析。结果表明,考虑裂纹闭合效应的模型,可以用于表面裂纹疲劳扩展行为的预测。Surface cracks are common defects in the service process of high temperature structures. It is an essential content of structural integrity evaluation to study its propagation behavior and law under fatigue loading. The fatigue tests of heat-resistant steel CrMoCoV （ FB2 steel） containing surface cracks are car- ried out. Numerical analysis of fatigue propagation behavior of surface cracks is also conducted based on Zencrack software, with considering the closure effect to correct the propagation behavior of surface cracks. The results show that the model considering crack crack propagation behavior of surface cracks. closure effect can be used to predict the fatigue

关 键 词：耐热钢CrMoCoV 表面裂BE 疲劳 Zencrack 闭合效应 

分 类 号：TH142.2[一般工业技术—材料科学与工程] TG113.25[机械工程—机械制造及自动化]