首页> 外文学位 >Application of Weakest Link Probabilistic Framework for Fatigue Notch Factor to Aero Engine Materials.
【24h】

Application of Weakest Link Probabilistic Framework for Fatigue Notch Factor to Aero Engine Materials.

机译:疲劳缺口因子最弱链接概率框架在航空发动机材料中的应用。

获取原文
获取原文并翻译 | 示例

摘要

Nickel base super alloy and titanium alloy notched components are of utmost importance because of their application in the aero industry. Titanium alloy is used for airframe components and compressor blades application because of its high strength and fracture toughness at low temperatures and high strength and creep resistance at elevated temperature. Nickel base super alloy is used in hot sections of the gas turbine engine due to its high strength and good creep, fatigue, and corrosion resistance at high temperature. The microstructure features of these alloys are reviewed and crystal plasticity finite element modeling is presented. A new probabilistic approach based on weakest-link theory which captures both the essence of microstructure and the notch root stress gradient is described and applied to nickel base superalloy and titanium alloys to determine their microstructure sensitive fatigue notch factor and notch sensitivity index at varying notch root radii. The effects of the position and the orientations of inclusion on the fatigue notch factor of nickel base super alloy is also investigated. The fatigue notch factors obtained are in direct correlation with the experimentally obtained value for the different notch root radii.
机译:镍基超级合金和钛合金带槽口的零件由于在航空工业中的应用而极为重要。钛合金由于其在低温下的高强度和断裂韧性以及在高温下的高强度和抗蠕变性而用于机身部件和压气机叶片。镍基超级合金由于其高强度以及良好的高温蠕变,疲劳和耐腐蚀性能而被用于燃气涡轮发动机的高温区域。综述了这些合金的微观结构特征,并提出了晶体可塑性有限元建模。描述了一种基于最弱链接理论的新概率方法,该方法同时捕获了显微组织的本质和缺口根应力梯度,并将其应用于镍基高温合金和钛合金,以确定其在不同缺口根处的微观结构敏感性疲劳缺口因子和缺口敏感性指数半径还研究了夹杂物的位置和取向对镍基超级合金疲劳缺口因子的影响。获得的疲劳缺口因子与不同缺口根半径的实验获得的值直接相关。

著录项

  • 作者单位

    Howard University.;

  • 授予单位 Howard University.;
  • 学科 Mechanical engineering.
  • 学位 M.Eng.
  • 年度 2013
  • 页码 129 p.
  • 总页数 129
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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