A novel fatigue-oxidation-creep life prediction method under non-proportional loading

被引：11

作者：

Li, Dao-Hang ^{[1
,3
]}

Shang, De-Guang ^{[1
]}

Yin, Xiang ^{[1
]}

Li, Ming ^{[2
,3
]}

Chen, Feng ^{[1
]}

Sun, Guo-Qin ^{[1
]}

Sun, Wei ^{[3
]}

机构：

[1] Beijing Univ Technol, Fac Mat & Mfg, Beijing 100124, Peoples R China

[2] Northwestern Polytech Univ, Sch Mech Civil Engn & Architecture, Xian 710072, Peoples R China

[3] Univ Nottingham, Fac Engn, Nottingham NG7 2RD, England

来源：

ENGINEERING FAILURE ANALYSIS | 2022年 / 131卷

基金：

英国工程与自然科学研究理事会;

关键词：

Fatigue-oxidation-creep damage; Non-proportional hardening; Elastic-viscoplastic; Notch; Multiaxial loading; PSEUDO STRESS CORRECTION; NICKEL-BASED SUPERALLOY; CRACK INITIATION LIFE; NI-BASED SUPERALLOY; THERMOMECHANICAL FATIGUE; MULTIAXIAL FATIGUE; NOTCHED SPECIMENS; DAMAGE EVOLUTION; BASE SUPERALLOY; BEHAVIOR;

D O I：

10.1016/j.engfailanal.2021.105805

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

In this paper, a new life assessment framework is proposed based on the elastic-viscoplastic modeling and the damage behavior for the structural component under multiaxial nonproportional loading at high temperature. The viscoplastic constitutive model with the ability to capture the non-proportional hardening effect is used to obtain the stress-strain fields, in which a new method based on the rotation of strain axis is proposed to evaluate the notch rotation factor. The damage model, which can comprehensively capture the multiaxial fatigue-oxidationcreep behaviors, is used to assess the failure life. In addition, the proposed framework is evaluated by the life results under proportional and non-proportional fatigue loadings at 650 degrees C, and the errors are found to be within a factor of 2.

引用

页数：22

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