A unified prediction model for physically small crack and long crack growth based on modified CTOD

Wei Zhang; Lindong Chai; Luping Ren; Liang Cai

doi:10.1016/j.engfracmech.2022.108650

A unified prediction model for physically small crack and long crack growth based on modified CTOD

Wei Zhang^*, Lindong Chai, Luping Ren, Liang Cai

^*此作品的通讯作者

数学学院

科研成果: 期刊稿件 › 文章 › 同行评审

12 引用（Scopus）

摘要

A unified model based on CTOD is proposed to calculate the growth rate of physically small crack (PSC) and long crack (LC). Firstly, an in-situ SEM testing under the single overload condition is performed to reveal that CTOD could be the unique driving parameter for fatigue crack growth (FCG). Then, a unified FCG model is established based on the modified CTOD formula which considers the main physical mechanisms of small crack effect. Additionally, a theoretical equation of the transition crack length from PSC to LC is given. Finally, several datasets of different materials are used to validate the model.

源语言	英语
文章编号	108650
期刊	Engineering Fracture Mechanics
卷	271
DOI	https://doi.org/10.1016/j.engfracmech.2022.108650
出版状态	已出版 - 8月 2022

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10.1016/j.engfracmech.2022.108650

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Zhang, W., Chai, L., Ren, L., & Cai, L. (2022). A unified prediction model for physically small crack and long crack growth based on modified CTOD. Engineering Fracture Mechanics, 271, 文章 108650. https://doi.org/10.1016/j.engfracmech.2022.108650

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title = "A unified prediction model for physically small crack and long crack growth based on modified CTOD",

abstract = "A unified model based on CTOD is proposed to calculate the growth rate of physically small crack (PSC) and long crack (LC). Firstly, an in-situ SEM testing under the single overload condition is performed to reveal that CTOD could be the unique driving parameter for fatigue crack growth (FCG). Then, a unified FCG model is established based on the modified CTOD formula which considers the main physical mechanisms of small crack effect. Additionally, a theoretical equation of the transition crack length from PSC to LC is given. Finally, several datasets of different materials are used to validate the model.",

keywords = "Crack closure, Crack growth model, Crack tip opening displacement, Microstructural dissimilitude, Small crack",

author = "Wei Zhang and Lindong Chai and Luping Ren and Liang Cai",

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier Ltd",

year = "2022",

month = aug,

doi = "10.1016/j.engfracmech.2022.108650",

language = "English",

volume = "271",

journal = "Engineering Fracture Mechanics",

issn = "0013-7944",

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TY - JOUR

T1 - A unified prediction model for physically small crack and long crack growth based on modified CTOD

AU - Zhang, Wei

AU - Chai, Lindong

AU - Ren, Luping

AU - Cai, Liang

PY - 2022/8

Y1 - 2022/8

N2 - A unified model based on CTOD is proposed to calculate the growth rate of physically small crack (PSC) and long crack (LC). Firstly, an in-situ SEM testing under the single overload condition is performed to reveal that CTOD could be the unique driving parameter for fatigue crack growth (FCG). Then, a unified FCG model is established based on the modified CTOD formula which considers the main physical mechanisms of small crack effect. Additionally, a theoretical equation of the transition crack length from PSC to LC is given. Finally, several datasets of different materials are used to validate the model.

AB - A unified model based on CTOD is proposed to calculate the growth rate of physically small crack (PSC) and long crack (LC). Firstly, an in-situ SEM testing under the single overload condition is performed to reveal that CTOD could be the unique driving parameter for fatigue crack growth (FCG). Then, a unified FCG model is established based on the modified CTOD formula which considers the main physical mechanisms of small crack effect. Additionally, a theoretical equation of the transition crack length from PSC to LC is given. Finally, several datasets of different materials are used to validate the model.

KW - Crack closure

KW - Crack growth model

KW - Crack tip opening displacement

KW - Microstructural dissimilitude

KW - Small crack

UR - http://www.scopus.com/inward/record.url?scp=85134327439&partnerID=8YFLogxK

U2 - 10.1016/j.engfracmech.2022.108650

DO - 10.1016/j.engfracmech.2022.108650

M3 - Article

AN - SCOPUS:85134327439

SN - 0013-7944

VL - 271

JO - Engineering Fracture Mechanics

JF - Engineering Fracture Mechanics

M1 - 108650

ER -

A unified prediction model for physically small crack and long crack growth based on modified CTOD

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