• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Materials Engineering and Performance >Effect of Tensile Mean Strain on Fatigue Behavior of Al-Li Alloy 2099
【24h】

Effect of Tensile Mean Strain on Fatigue Behavior of Al-Li Alloy 2099

机译：拉伸平均菌株对Al-Li合金疲劳行为的影响2099

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

In this study, the effect of tensile mean strain on the fatigue behavior of aluminum alloy 2099-T83 was experimentally examined for the first time. In order to elucidate the effect of tensile mean strain on fatigue lives, strain-control fatigue testing was conducted at three strain ratios (R = - 1, 0.1, 0.7). Experimental results show that the application of greater mean strains during cyclic deformation resulted in shorter fatigue lives, particularly at lower strain amplitudes. At these lower strain amplitudes, the mean stress response to deformation did not fully relax as it did when subjected to larger strain amplitudes, where the effect of mean strains on fatigue performance was negligible. The Morrow and Smith-Watson-Topper mean strain correction models were implemented using monotonic and fully reversed fatigue properties in order to account for the damage associated with the relaxed mean stresses. A new model is presented that incorporates a mean stress sensitivity material property to capture, within a scatter band of three, the effects of tensile mean strains on the fatigue behavior of AA2099.
机译：在该研究中，首次进行了实验检查了拉伸平均菌株对铝合金2099-T83的疲劳行为的影响。为了阐明拉伸平均菌株对疲劳寿命的影响，应变控制疲劳试验以三种应变比（R = - 1,0.1,0.7）进行。实验结果表明，在循环变形期间施加更大的血缘菌株导致疲劳寿命较短，特别是在较低的应变幅度下。在这些较低的应变幅度下，在经受较大的应变幅度时，对变形的平均应力响应并未完全放松，其中平均菌株对疲劳性能的影响可忽略不计。明天和史密斯 - 沃森 - 拓盖平均应变校正模型是使用单调和完全反转的疲劳特性实现的，以便考虑与轻松的平均应力相关的损伤。提出了一种新型模型，其包括捕获的平均应激敏感性材料特性，以在三个散射带内捕获拉伸平均菌株对AA2099的疲劳行为的影响。

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