...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Fatigue & fracture of engineering materials and structures >Cumulative damage model based on equivalent fatigue under multiaxial thermomechanical random loading
【24h】

Cumulative damage model based on equivalent fatigue under multiaxial thermomechanical random loading

机译：基于相同疲劳的多轴热机械随机加载基于等效疲劳的累积损伤模型

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

A new creep-fatigue damage cumulative model is proposed under multiaxial thermomechanical random loading, in which the damage at high temperature can be divided into the pure fatigue damage and the equivalent fatigue damage from creep. During the damage accumulation process, the elementary percentage of the equivalent fatigue damage increment is proportional to that of the creep damage increment, and the creep damage is converted to the equivalent fatigue damage. Moreover, combined with a multiaxial cyclic counting method, a life prediction method is developed based on the proposed creep-fatigue damage cumulative model. In the developed life prediction method, the effects of nonproportional hardening on the fatigue and creep damages are considered, and the influence of mean stress on damage is also taken into account. The thermomechanical fatigue experimental data for thin-walled tubular specimen of superalloy GH4169 under multiaxial constant amplitude and variable amplitude loadings were used to verify the proposed model. The results showed that the proposed method can obtain satisfactory life prediction results.
机译：在多轴热机械随机加载下提出了一种新的蠕变 - 疲劳损伤累积模型，其中高温损坏可分为纯疲劳损坏和蠕变的等效疲劳损坏。在损伤累积过程中，等效疲劳损伤增量的基本百分比与蠕变损伤增量的百分比成比例，并且将蠕变损伤转换为等效的疲劳损坏。此外，结合多轴循环计数方法，基于所提出的蠕变 - 疲劳损伤累积模型开发了寿命预测方法。在发达的寿命预测方法中，考虑了非备产硬化对疲劳和蠕变损伤的影响，也考虑了平均胁迫对损伤的影响。使用在多轴恒定幅度和可变幅度载荷下的超合金GH4169薄壁管状试样的热机械疲劳实验数据来验证所提出的模型。结果表明，该方法可以获得令人满意的寿命预测结果。

著录项

  • 来源
  • 作者

    Luo-Jin Li; De-Guang Shang; Dao-Hang Li; Long Xue; Xiao-Dong Liu; Xiang Yin; Cheng-Cheng Zhang; Bo Chen;

  • 作者单位

    College of Mechanical Engineering and Applied Electronics Technology Beijing University of Technology Beijing 100124 China;

    College of Mechanical Engineering and Applied Electronics Technology Beijing University of Technology Beijing 100124 China;

    College of Mechanical Engineering and Applied Electronics Technology Beijing University of Technology Beijing 100124 China;

    College of Mechanical Engineering and Applied Electronics Technology Beijing University of Technology Beijing 100124 China;

    College of Mechanical Engineering and Applied Electronics Technology Beijing University of Technology Beijing 100124 China;

    College of Mechanical Engineering and Applied Electronics Technology Beijing University of Technology Beijing 100124 China;

    Commercial Aircraft Engine Co. Ltd Aero Engine Corporation of China Shanghai 201108 China;

    Beijing Institute of Aeronautical Materials Aero Engine Corporation of China Beijing 100095 China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    creep-fatigue damage accumulation; life prediction; multiaxial random loading; Ni-based superalloy; thermomechanical fatigue;

    机译：蠕变疲劳损伤积累;生活预测;多轴随机加载;基于NI的超合金;热机械疲劳;

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