Modified stress intensity factor equations for semi-elliptical surface cracks in finite thickness and width plates

Yang Peng; Lewei Tong; Xiao Ling Zhao; Zhigang Xiao

doi:10.1016/j.proeng.2011.07.327

Modified stress intensity factor equations for semi-elliptical surface cracks in finite thickness and width plates

Yang Peng, Lewei Tong, Xiao Ling Zhao, Zhigang Xiao

Research output: Journal article publication › Conference article › Academic research › peer-review

8 Citations (Scopus)

Abstract

Weld defects and severe variation of shape near the welds cause high stress concentration at weld toes or weld roots. This high stress concentration reduces fatigue lives of welded structures. A stress intensity factor (SIF) which includes this effect increases the accuracy of fatigue lives prediction. A magnification factor is commonly used to multiply the SIF of semi-elliptical surface cracks to account for the stress concentration effect in welded connections. Yamada and Hirt model is one of these methods. Comparison between Yamada & Hirt SIF equations and Newman & Raju SIF equations are applied to SIF of semi-elliptical surface cracks. The results suggest that Yamada & Hirt SIF equations are valid when the crack aspect ratio is less than 0.6. New empirical SIF equations are developed based on Yamada & Hirt SIF equations. The newly derived SIF equations are verified by comparing with experimental data.

Original language	English
Pages (from-to)	2601-2608
Number of pages	8
Journal	Procedia Engineering
Volume	14
DOIs	https://doi.org/10.1016/j.proeng.2011.07.327
Publication status	Published - 2011
Externally published	Yes
Event	12th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC12 - Hong Kong, Hong Kong Duration: 26 Jan 2011 → 28 Jan 2011

Keywords

Crack propagation
Fatigue
Fracture mechanics
Stress intensity factor
Surface crack

ASJC Scopus subject areas

General Engineering

More information

10.1016/j.proeng.2011.07.327

Cite this

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title = "Modified stress intensity factor equations for semi-elliptical surface cracks in finite thickness and width plates",

abstract = "Weld defects and severe variation of shape near the welds cause high stress concentration at weld toes or weld roots. This high stress concentration reduces fatigue lives of welded structures. A stress intensity factor (SIF) which includes this effect increases the accuracy of fatigue lives prediction. A magnification factor is commonly used to multiply the SIF of semi-elliptical surface cracks to account for the stress concentration effect in welded connections. Yamada and Hirt model is one of these methods. Comparison between Yamada & Hirt SIF equations and Newman & Raju SIF equations are applied to SIF of semi-elliptical surface cracks. The results suggest that Yamada & Hirt SIF equations are valid when the crack aspect ratio is less than 0.6. New empirical SIF equations are developed based on Yamada & Hirt SIF equations. The newly derived SIF equations are verified by comparing with experimental data.",

keywords = "Crack propagation, Fatigue, Fracture mechanics, Stress intensity factor, Surface crack",

author = "Yang Peng and Lewei Tong and Zhao, {Xiao Ling} and Zhigang Xiao",

note = "Funding Information: The authors gratefully acknowledge the financial support from the Department of Civil Engineering, Monash University and the Department of Building Engineering, Tongji University. The first author gratefully acknowledges the financial support from the Chinese Scholarship Council (CSC). He also would like to thank Dr. Wenhui Duan of Monash University for helpful discussions.; 12th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC12 ; Conference date: 26-01-2011 Through 28-01-2011",

year = "2011",

doi = "10.1016/j.proeng.2011.07.327",

language = "English",

volume = "14",

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journal = "Procedia Engineering",

issn = "1877-7058",

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TY - JOUR

T1 - Modified stress intensity factor equations for semi-elliptical surface cracks in finite thickness and width plates

AU - Peng, Yang

AU - Tong, Lewei

AU - Zhao, Xiao Ling

AU - Xiao, Zhigang

N1 - Funding Information: The authors gratefully acknowledge the financial support from the Department of Civil Engineering, Monash University and the Department of Building Engineering, Tongji University. The first author gratefully acknowledges the financial support from the Chinese Scholarship Council (CSC). He also would like to thank Dr. Wenhui Duan of Monash University for helpful discussions.

PY - 2011

Y1 - 2011

N2 - Weld defects and severe variation of shape near the welds cause high stress concentration at weld toes or weld roots. This high stress concentration reduces fatigue lives of welded structures. A stress intensity factor (SIF) which includes this effect increases the accuracy of fatigue lives prediction. A magnification factor is commonly used to multiply the SIF of semi-elliptical surface cracks to account for the stress concentration effect in welded connections. Yamada and Hirt model is one of these methods. Comparison between Yamada & Hirt SIF equations and Newman & Raju SIF equations are applied to SIF of semi-elliptical surface cracks. The results suggest that Yamada & Hirt SIF equations are valid when the crack aspect ratio is less than 0.6. New empirical SIF equations are developed based on Yamada & Hirt SIF equations. The newly derived SIF equations are verified by comparing with experimental data.

AB - Weld defects and severe variation of shape near the welds cause high stress concentration at weld toes or weld roots. This high stress concentration reduces fatigue lives of welded structures. A stress intensity factor (SIF) which includes this effect increases the accuracy of fatigue lives prediction. A magnification factor is commonly used to multiply the SIF of semi-elliptical surface cracks to account for the stress concentration effect in welded connections. Yamada and Hirt model is one of these methods. Comparison between Yamada & Hirt SIF equations and Newman & Raju SIF equations are applied to SIF of semi-elliptical surface cracks. The results suggest that Yamada & Hirt SIF equations are valid when the crack aspect ratio is less than 0.6. New empirical SIF equations are developed based on Yamada & Hirt SIF equations. The newly derived SIF equations are verified by comparing with experimental data.

KW - Crack propagation

KW - Fatigue

KW - Fracture mechanics

KW - Stress intensity factor

KW - Surface crack

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U2 - 10.1016/j.proeng.2011.07.327

DO - 10.1016/j.proeng.2011.07.327

M3 - Conference article

AN - SCOPUS:80054790932

SN - 1877-7058

VL - 14

SP - 2601

EP - 2608

JO - Procedia Engineering

JF - Procedia Engineering

T2 - 12th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC12

Y2 - 26 January 2011 through 28 January 2011

ER -

Modified stress intensity factor equations for semi-elliptical surface cracks in finite thickness and width plates

Abstract

Keywords

ASJC Scopus subject areas

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