A modification to the two driving forces model for fatigue threshold prediction

Shanlin Li; Shao Shi Rui; Kejian Li; Mengjia Hu; Xu Zhang; Xiaogang Li; Zhipeng Cai; Jiluan Pan

doi:10.1016/j.ijfatigue.2021.106259

A modification to the two driving forces model for fatigue threshold prediction

Shanlin Li
, Shao Shi Rui
, Kejian Li^*
, Mengjia Hu
, Xu Zhang
, Xiaogang Li
, Zhipeng Cai
, Jiluan Pan

^*此作品的通讯作者

Tsinghua University
Key Laboratory of Precision Opto-Mechatronics Technology (Ministry of Education)

科研成果: 期刊稿件 › 文章 › 同行评审

6 引用（Scopus）

摘要

The two driving forces (TDF) model was modified based on the dislocation dipoles mechanism of fatigue crack growth (FCG) and corrected by K_max effect for a better prediction of the R dependent FCG thresholds ΔK_th and K_max,th. This model can well describe transformation of the crack growth mechanism from fatigue fracture to quasi-static fracture when R tends to 1, and agrees well with experimental data for a broad round of alloy systems. An empirical relationship between the fatigue threshold and the fracture toughness was proposed, and then an approximately material-independent fatigue threshold prediction model was established by normalization based on this relationship.

源语言	英语
文章编号	106259
期刊	International Journal of Fatigue
卷	149
DOI	https://doi.org/10.1016/j.ijfatigue.2021.106259
出版状态	已出版 - 8月 2021
已对外发布	是

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title = "A modification to the two driving forces model for fatigue threshold prediction",

abstract = "The two driving forces (TDF) model was modified based on the dislocation dipoles mechanism of fatigue crack growth (FCG) and corrected by Kmax effect for a better prediction of the R dependent FCG thresholds ΔKth and Kmax,th. This model can well describe transformation of the crack growth mechanism from fatigue fracture to quasi-static fracture when R tends to 1, and agrees well with experimental data for a broad round of alloy systems. An empirical relationship between the fatigue threshold and the fracture toughness was proposed, and then an approximately material-independent fatigue threshold prediction model was established by normalization based on this relationship.",

keywords = "Crack driving force, Fatigue crack growth, Fatigue thresholds, Stress ratio",

author = "Shanlin Li and Rui, \{Shao Shi\} and Kejian Li and Mengjia Hu and Xu Zhang and Xiaogang Li and Zhipeng Cai and Jiluan Pan",

note = "Publisher Copyright: {\textcopyright} 2021 Elsevier Ltd",

year = "2021",

month = aug,

doi = "10.1016/j.ijfatigue.2021.106259",

language = "英语",

volume = "149",

journal = "International Journal of Fatigue",

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TY - JOUR

T1 - A modification to the two driving forces model for fatigue threshold prediction

AU - Li, Shanlin

AU - Rui, Shao Shi

AU - Li, Kejian

AU - Hu, Mengjia

AU - Zhang, Xu

AU - Li, Xiaogang

AU - Cai, Zhipeng

AU - Pan, Jiluan

PY - 2021/8

Y1 - 2021/8

N2 - The two driving forces (TDF) model was modified based on the dislocation dipoles mechanism of fatigue crack growth (FCG) and corrected by Kmax effect for a better prediction of the R dependent FCG thresholds ΔKth and Kmax,th. This model can well describe transformation of the crack growth mechanism from fatigue fracture to quasi-static fracture when R tends to 1, and agrees well with experimental data for a broad round of alloy systems. An empirical relationship between the fatigue threshold and the fracture toughness was proposed, and then an approximately material-independent fatigue threshold prediction model was established by normalization based on this relationship.

AB - The two driving forces (TDF) model was modified based on the dislocation dipoles mechanism of fatigue crack growth (FCG) and corrected by Kmax effect for a better prediction of the R dependent FCG thresholds ΔKth and Kmax,th. This model can well describe transformation of the crack growth mechanism from fatigue fracture to quasi-static fracture when R tends to 1, and agrees well with experimental data for a broad round of alloy systems. An empirical relationship between the fatigue threshold and the fracture toughness was proposed, and then an approximately material-independent fatigue threshold prediction model was established by normalization based on this relationship.

KW - Crack driving force

KW - Fatigue crack growth

KW - Fatigue thresholds

KW - Stress ratio

UR - https://www.scopus.com/pages/publications/85104638003

U2 - 10.1016/j.ijfatigue.2021.106259

DO - 10.1016/j.ijfatigue.2021.106259

M3 - 文章

AN - SCOPUS:85104638003

SN - 0142-1123

VL - 149

JO - International Journal of Fatigue

JF - International Journal of Fatigue

M1 - 106259

ER -

A modification to the two driving forces model for fatigue threshold prediction

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