• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国政府科技报告 >Fracture Resistance and Fatigue Crack Growth Characteristics of Railroad Wheels and Axles.
【24h】

Fracture Resistance and Fatigue Crack Growth Characteristics of Railroad Wheels and Axles.

机译：铁路车轮和车轴的抗断裂性和疲劳裂纹扩展特性。

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The effects of chemical composition,temperature and loading rates on the plane strain fracture toughness (K sub Ic) of railroad wheels have been determined. Similarly,the effects of these variables were determined for grade U and F railroads axles. The carbon content was determined to be the principal factor controlling (K sub Ic). Sensitivity to loading rate (K sub Id) was seen to be a function of the microstructure. Estimates have been made of the minimum size of crack,which could result in the failure of wheels and axles under adverse service conditions. Also investigated were the effects of chemical composition,heat treatment,temperature,stress ratio (R),environment and peak loads on the fatigue crack growth characteristics of wheels and axles. It was seen that the effects of R could be predicted by the Forman equation and that crack growth rates were predominantly affected by R. Otherwise,all values fell within the same scatterband. Predictions of crack growth to criticality as a function of cycles were made for wheels and axles. Based on these calculations,it was concluded that detection of subcritical flaws with a good degree of confidence would only be possible for the classes A and sub A wheels and the grades U and F axles.

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号