缺口热机械疲劳寿命预测方法研究
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- 英文论文题名：Thermal mechanical fatigue life prediction study on a notched superalloy
- 论文作者：胡晓安 ; 薛志远 ; 饶国锋 ; 杨晓光
- 英文论文作者：Hu Xiaoan ; Yang Xiaoguang ; School of Aircraft Engineering ; Nan Chang HangK ong University
- 年：2016
- 作者机构：南昌航空大学飞行器工程学院;
- 论文关键词：热机械疲劳 ; 缺口 ; 高温合金 ; 寿命预测 ; 粘塑性本构
- 英文论文关键词：TMF ; notch ; superalloy ; life prediction ; viscoplastic constitutive
- 会议召开时间：2016-11-25
- 会议录名称：2016年航空科学与技术全国博士生学术论坛摘要集
- 语种：中文
- 分类号：TG132.3
- 学会代码：XBHH
- 会议名称：2016年航空科学与技术全国博士生学术论坛
- 会议地点：中国陕西西安
- 主办单位：西北工业大学研究生院、中国高校航空学院院长联席会
- 学会名称：西北工业大学航空学院
- 页数：1
- 文件大小：473k
- 原文格式：D
- 会议级别：全国
摘要
研究了某定向凝固高温合金的热机械疲劳寿命预测方法。基于粘塑性本构理论建立了镍基高温合金的循环和蠕变变形数值模拟方法,针对两种不同应力集中因子的圆棒缺口进行了粘塑性应力分析;建立了一种基于高应力体积平均的缺口寿命理论,并预测了两种缺口在热机械疲劳载荷下的寿命。
Thermal mechanical fatigue life prediction method was investigated for a directionally solidified superalloy. Firstly, a viscoplastic constitutive theory was established to model the cyclic and creep deformation at different temperatures. Then, the model was used to analysis the stress and strain at the notches for specimens with two different stress concentration. Finally, a high stress volume average method was developed to deal with the notch effect, and the TMF life was predicted using this model for superalloy with different notches.
Thermal mechanical fatigue life prediction method was investigated for a directionally solidified superalloy. Firstly, a viscoplastic constitutive theory was established to model the cyclic and creep deformation at different temperatures. Then, the model was used to analysis the stress and strain at the notches for specimens with two different stress concentration. Finally, a high stress volume average method was developed to deal with the notch effect, and the TMF life was predicted using this model for superalloy with different notches.
引文