Experimental investigations on combined high and low cycle fatigue: Material-level specimen design and strain response characteristics

被引：0

作者：

Ding, Xin ^{[1
]}

Huang, Dawei ^{[2
]}

Guo, Zixu ^{[3
]}

Yan, Han ^{[2
]}

Yan, Xiaojun ^{[2
]}

Wang, Yinzhuoran ^{[4
]}

Yin, Feng ^{[1
]}

Luan, Xu ^{[1
]}

机构：

[1] Aero Engine Corp China, Gas Turbine Corp Ltd, Res & Dev Ctr, Shenyang 110015, Peoples R China

[2] Beihang Univ, Sch Energy & Power Engn, Beijing 100191, Peoples R China

[3] Natl Univ Singapore, Dept Mech Engn, Singapore 117575, Singapore

[4] Northeastern Univ, Sch Met, Shenyang 110167, Peoples R China

来源：

CHINESE JOURNAL OF AERONAUTICS | 2025年 / 38卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Material-level specimen; Low-cycle fatigue; High-cycle fatigue; Combined high- and low- cycle fatigue; Fatigue life; Strain response; LIFE PREDICTION; DAMAGE; SUPERALLOY; MODEL; BEHAVIOR; PERFORMANCE; MECHANISMS; EVOLUTION; ALLOY;

D O I：

10.1016/j.cja.2024.09.022

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

The paper designs a novel material-level specimen and its dedicated fixture suitable for applying Combined high- and low- Cycle Fatigue (CCF) loads. Unlike full-scale or simulation specimens, the CCF specimen eliminates geometrically induced stress gradients in the test region. Experimental data on CCF life and strain responses of ZSGH4169 alloy are acquired under different CCF loads. The Maximum Strain within Each (MSE) CCF cycle is demonstrated to be independent of the Low-Cycle Fatigue (LCF) loads and High-Cycle Fatigue (HCF) stress amplitudes, but exhibits a correlation with the Cycle Ratio of HCF/LCF (Rf). The growth law of MSE changes from linear to logarithmic as Rf decreases. Strain amplitudes in the dwell stage, observed unaffected by Rf, are quantified as a function of LCF nominal stresses and HCF stress amplitudes. However, under a defined CCF load, strain amplitudes in the dwell stage remain constant. Strain peaks in the dwell stage in a single CCF cycle decrease in a power function with increasing HCF cycles. (c) 2024 Chinese Society of Aeronautics and Astronautics. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

引用

页数：15

共 42 条

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