摘要
利用升载法对车轮钢进行II型疲劳裂纹扩展试验,采用ANSYS软件对II型加载试件建立有限元模型,计算II型裂纹尖端应力强度因子,研究加载力值比R对车轮轮辋Ⅱ型疲劳裂纹扩展门槛值ΔKIIth的影响。结果表明:车轮轮辋II型疲劳裂纹扩展门槛值ΔKIIth随加载力值比R的增加略有降低;在相同R的条件下,ΔKIIth与I型疲劳裂纹扩展门槛值ΔKIth基本相当。
II fatigue crack growth test of wheel steel was carried out with lifting load method.A finite element model was established with ANSYS software to calculate the stress intensity factor of crack tip under typeⅡloading,and the effect of loading force ratio R on the typeⅡfatigue crack propagation threshold(ΔKIIth)of wheel rim was studied.The results show thatΔKIIth decreases slightly with the increasing of loading force ratios R,under the condition of the same R,ΔKIIth and propagation threshold of type I fatigue crackΔKIth are basically equal.
作者
陈刚
赵海
丛韬
钟斌
肖蔚荣
任学冲
CHEN Gang;ZHAO Hai;CONG Tao;ZHONG Bin;XIAO Weirong;REN Xuechong(Technical Center,Ma’anshan Iron&Steel Co.Ltd.,Ma’anshan 243000;Metals&Chemistry Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;National Center for Materials Service Safety of University of Science and Technology Beijing,Beijing 10083)
出处
《安徽工业大学学报（自然科学版）》
CAS
2018年第3期197-201,共5页
Journal of Anhui University of Technology（Natural Science）
基金
国家高技术研究发展计划资助项目(2015AA034302)
国家重点基础研究发展计划资助项目(2015CB54801)
安徽省科技重大专项(17030901046)
关键词
车轮钢
疲劳裂纹扩展门槛值
Ⅱ型裂纹
wheel steel
fatigue crack propagation threshold
typeⅡcrack
