摘要
基于有限元软件Abaqus,采用扩展有限元法(XFEM)分析高强桥索钢丝冷拔过程的裂纹扩展,研究裂纹位置、裂纹角度、裂纹长度对裂纹扩展路径和裂缝宽度的影响。结果表明:冷拔过程裂纹基本符合I型扩展规律,裂纹位置、裂纹角度、裂纹长度对裂纹扩展路径无显著影响;裂纹位置越靠近中心、裂纹角度数值越小、裂纹长度越长时,裂缝宽度越大;裂纹位置越接近表面、裂纹角度数值越大、裂纹越长时,裂纹闭合越晚。此外,通过预应力冷拔机进行钢丝表面不同角度预制裂纹扩展试验,分析裂纹扩展规律并通过α-γ、α-δ曲线验证了数值模型的可靠性。
Based on the finite element software Abaqus,the extended finite element method(XFEM)was used to analyze the crack propagation during the cold drawing process of high-strength bridge cables. The effects of crack position,crack angle,and crack length on crack propagation path and crack width were studied and discussed. Numerical simulation results show that the crack in the cold drawing process basically conforms to the I-type growth law,and the crack position,crack angle,crack length have no significant influence on the crack propagation path. The closer the crack position is to the center,the smaller the crack angle value is,and the longer the crack length is. the larger the crack width is. The closer the crack position is to the surface,the larger the crack angle value is,and the longer the crack is,the later the crack closure phenomenon appears. In addition,a prestressed cold drawing machine was used to conduct prefabricated crack propagation tests at different angles on the surface of the steel wire. The crack propagation law was analyzed and the reliability of the numerical model was verified by α-γ and α-δ curves.
作者
殷晓磊
赵刚
鲍思前
程剑
龚黎
YIN Xiaolei;ZHAO Gang;BAO Siqian;CHENG Jian;GONG Li(School of Materials and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,China)
出处
《兵器材料科学与工程》
CAS
CSCD
北大核心
2021年第5期58-64,共7页
Ordnance Material Science and Engineering
基金
国家重点研发计划专项(2017YFB0304800)。
关键词
XFEM
高强桥索钢丝
裂纹扩展
裂纹扩展路径
裂缝宽度
裂纹闭合
XFEM
high-strength bridge cable steel wire
crack propagation
crack propagation path
crack width
crack closure
