• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Sixth International Conference on Damage and Fracture Mechanics: Computer Aided Assessment and Control 2000 Nontreal, Canada, >Effect of compressive mean stress on fatigue properties of structural steel
【24h】

Effect of compressive mean stress on fatigue properties of structural steel

机译：平均压缩应力对结构钢疲劳性能的影响

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Pulsating fatigue tests have been performed using the specimens with or without surface deformation to investigate the effect of compressive mean stress on fatigue properties of stuctural steel. In addtiion, the specimen's surfae has been observed by the successive taken replica method to investigate the change of surface state and fatigue crack initiation mechanism. The main results obtained in this tests are as follows; (1) The fatigue limits of the specimens with and withou surface deformation are 147 and 371 MPa. respectively. The above much difference of the fatigue limit would be caused by the compressive residual stress and work-hardening due to roller working. (2) According to increase of the compressive mean stress from 0,-75,-150 and 0225 MPa, the fatigue limits of these specimens also increase and are in proportion to 147, 160, 178, and 208 MPa. respectively. (3) The non-propagating micro-cracks are observed in teh specimens suffered by 1x10~7 cycles of the fatigue limit and their number and length become increase according to compressive mean stress or compressive residual one. (4) According to the above results, the compressive mean stress and compressive residual stress suppress the transition from crack initiation to propagation.
机译：使用有或没有表面变形的试样进行了脉动疲劳试验，以研究压缩平均应力对结构钢疲劳性能的影响。另外，采用连续复制法观察了试样的表面，以研究表面状态的变化和疲劳裂纹萌生机理。该测试获得的主要结果如下： （1）表面变形和不变形的试样的疲劳极限分别为147和371 MPa。分别。疲劳极限的上述很大差异是由于压辊残余应力和辊子加工导致的加工硬化引起的。 （2）随着压缩平均应力从0，-75，-150和0225 MPa的增加，这些样品的疲劳极限也增加，并且与147、160、178和208 MPa成比例。分别。 （3）在疲劳极限为1x10〜7个循环的试样中观察到非传播性微裂纹，其数量和长度随压缩平均应力或压缩残余应力的增加而增加。 （4）根据以上结果，压缩平均应力和压缩残余应力抑制了从裂纹萌生到扩展的过渡。

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