Application Research of Elastic-plastic Fracture Toughness Index CTOD in the Design of Railway Steel Bridge
Railway steel bridge belongs to large scale weld structures suffered with cyclic dynamic stress generated by train. In recent years, the section of bridge member becomes bigger, plate becomes thicker, connection form becomes more complicated, and steel bridge is applied to more districts even lower temperature environment. Fatigue and fracture problems become more serious. On the basis of Crack Tip Open Displacement (CTOD) test data of 372 specimens tested in different temperature, this paper discusses research work about fracture proof design that involved how to determine the criterion of Charpy V Notch (CVN) impact toughness by building the relationship between CTOD and CVN, how to prevent brittle fracture by stress control in railway steel bridge design based on COD design curve from test data, and how to do the fatigue design for railway steel bridge at -50 ℃ of design temperature in an easy way, The method of fatigue design at -50 ℃ environment has been used for railway steel bridge structure of Qinghai-Tinet Railway in China.
Railway steel bridge Fracture proof design Fatigue at low temperature CTOD test Toughness criterion
Yuling Zhang Jiyan Pan Jiluan Pan
1Railway Engineering Research Institute,CARS,Beijing 100081,China Department of Mechnical Engineering,Tsinghua University,Beijing 100084,China
国际会议
北京
英文
1-10
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）