|
|
|
| Analysis and Discussion on the Design Method for Rail Fracture-resisting under Low Temperature |
| FENG Bao-rui, WANG Yuan-qing, SHIYong-jiu |
| Tsinghua University, Beijing 100084, China |
|
|
|
|
Abstract Research purposes：With the Qinghai-Tibet Railway open to traffic, it becomes more and more important to do the research on the safety properties of rails under low temperature. To prevent the brittle fracture of rails under low temperature, a practical design method for rail fracture-resisting is of greatly realistic significance.
Research conclusions：At low temperature, the fracture of rails steel is of typical brittle fracture. Based on the plane stain fracture toughness KIC obtained by experiments, the practical fracture-resisting design method is given. For the common crack of the rails, the upper limit of the allowable crack ac is obtained for providing the basis for the damage detection.
|
|
Received: 08 December 2008
|
|
|
|
|
|
[ 1 ] 冯宝锐, 王元清, 石永久. 我国铁路钢轨断裂事故分析及其影响因素[J]. 低温建筑技术, 2005(4): 97-99.
[ 2 ] 奚望, 王元清, 石永久. 钢轨钢材低温力学性能的试验研究[J]. 铁道工程学报, 2006(8): 25-29.
[ 3 ] 胡传炘. 断裂力学及其工程应用[M]. 北京工业大学出版社, 1988.
[ 4 ] TB/T2344—2003, 43 kg/m～75 kg/m热轧钢轨订货技术条件[S].
[ 5 ] GB 4161—84, 金属材料平面应变断裂韧度KIC试验方法[S].
[ 6 ] 吴庆记. 重型钢轨轨端裂纹失效机制探讨[J]. 兰州铁道学院学报, 1999(1): 55-60.
[ 7 ] TB10082—2005, 铁路轨道设计规范[S] .
[ 8 ] 王元清, 冯宝锐, 石永久. 低温下铁路钢轨断裂韧性分析[J] .铁道科学与工程学报, 2007, 4(4): 1-5.
|
|
|
|
2009, Vol. 26 
