• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国政府科技报告 >Study of Slipper and Rail Wear Interaction at Low Speed
【24h】

Study of Slipper and Rail Wear Interaction at Low Speed

机译：低速滑靴与轨道磨损相互作用的研究

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

摘要

The wear research presented in the work consists of results gathered from adapting a FEM based on a Holloman High Speed Test Track (HHSTT) mission executed in January 2008. The FEM consists of a VascoMax slipper sliding on a stationary AISI-1080 steel rail. The slipper is slid along the rail at speeds of 20 m/s and 40 m/s with complementary vertical velocities of -0.079 m/s and - 0.059 m/s, respectively. The surface roughness caused by features such as asperities and valleys of the materials, is simulated in this model by five asperities, 1 micron to 5 microns on the rail and a slipper with a leading edge radius of 6 microns. The free space between the surfaces, caused by the interaction of the asperities and valleys, is approximated by three gap spacings of 0.5 microns, 1.0 micron, and 1.5 microns. This study also explores three different Mesh refinements in the wearing portion of slipper to uncover any mesh dependence affecting the amount of wear. Additional simulations were completed to highlight the effects of using more accurate material definitions, tables of specific heat capacities were used instead of static values and more applicable, lower strain rate Johnson Cook plasticity parameters were. In a final three simulations, asperities with a smooth root fillet are used to highlight the model behavioral differences due to this simple change.

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