Retardation of fatigue crack growth in high strength steel S690 using a modified stop-hole technique

Seyed Mohammad Javad Razavi; Majid Reza Ayatollahi; Christof Sommitsch; Christian Moser

doi:10.1016/j.engfracmech.2016.11.013

Retardation of fatigue crack growth in high strength steel S690 using a modified stop-hole technique

Seyed Mohammad Javad Razavi, Majid Reza Ayatollahi^*, Christof Sommitsch, Christian Moser

^*Corresponding author for this work

Institute of Materials Science, Joining and Forming (3030)

Research output: Contribution to journal › Article › peer-review

Abstract

The purpose of this paper is to study the effects of a new stop-hole technique on the subsequent delay in fatigue crack propagation. Single edge notch tension specimens of S690 steel alloy are used to perform the fatigue crack initiation/growth tests under cyclic stress loading. A parametric study is conducted on different geometrical parameters of double stop-hole. The experimental procedure is simulated using finite element analysis and fatigue life models. The experiments including fatigue crack initiation/growth measurements and microscopic examinations beside the numerical results show that the fatigue life extension caused by the double stop-hole method is significantly more than that of the conventional single stop-hole method. The lower stress level around the double stop-hole plays an important role in increasing the fatigue initiation life from the stop-hole edge.

Original language	English
Pages (from-to)	226 - 237
Journal	Engineering Fracture Mechanics
Volume	169
DOIs	https://doi.org/10.1016/j.engfracmech.2016.11.013
Publication status	Published - 2017

ASJC Scopus subject areas

General Materials Science

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10.1016/j.engfracmech.2016.11.013

Cite this

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title = "Retardation of fatigue crack growth in high strength steel S690 using a modified stop-hole technique",

abstract = "The purpose of this paper is to study the effects of a new stop-hole technique on the subsequent delay in fatigue crack propagation. Single edge notch tension specimens of S690 steel alloy are used to perform the fatigue crack initiation/growth tests under cyclic stress loading. A parametric study is conducted on different geometrical parameters of double stop-hole. The experimental procedure is simulated using finite element analysis and fatigue life models. The experiments including fatigue crack initiation/growth measurements and microscopic examinations beside the numerical results show that the fatigue life extension caused by the double stop-hole method is significantly more than that of the conventional single stop-hole method. The lower stress level around the double stop-hole plays an important role in increasing the fatigue initiation life from the stop-hole edge.",

keywords = "Double stop-hole, Notches, Fatigue crack initiation, Fatigue crack growth, Crack growth retardation",

author = "Razavi, {Seyed Mohammad Javad} and Ayatollahi, {Majid Reza} and Christof Sommitsch and Christian Moser",

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language = "English",

volume = "169",

pages = "226 -- 237",

journal = "Engineering Fracture Mechanics ",

issn = "1873-7315",

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T1 - Retardation of fatigue crack growth in high strength steel S690 using a modified stop-hole technique

AU - Razavi, Seyed Mohammad Javad

AU - Ayatollahi, Majid Reza

AU - Sommitsch, Christof

AU - Moser, Christian

PY - 2017

Y1 - 2017

N2 - The purpose of this paper is to study the effects of a new stop-hole technique on the subsequent delay in fatigue crack propagation. Single edge notch tension specimens of S690 steel alloy are used to perform the fatigue crack initiation/growth tests under cyclic stress loading. A parametric study is conducted on different geometrical parameters of double stop-hole. The experimental procedure is simulated using finite element analysis and fatigue life models. The experiments including fatigue crack initiation/growth measurements and microscopic examinations beside the numerical results show that the fatigue life extension caused by the double stop-hole method is significantly more than that of the conventional single stop-hole method. The lower stress level around the double stop-hole plays an important role in increasing the fatigue initiation life from the stop-hole edge.

AB - The purpose of this paper is to study the effects of a new stop-hole technique on the subsequent delay in fatigue crack propagation. Single edge notch tension specimens of S690 steel alloy are used to perform the fatigue crack initiation/growth tests under cyclic stress loading. A parametric study is conducted on different geometrical parameters of double stop-hole. The experimental procedure is simulated using finite element analysis and fatigue life models. The experiments including fatigue crack initiation/growth measurements and microscopic examinations beside the numerical results show that the fatigue life extension caused by the double stop-hole method is significantly more than that of the conventional single stop-hole method. The lower stress level around the double stop-hole plays an important role in increasing the fatigue initiation life from the stop-hole edge.

KW - Double stop-hole, Notches, Fatigue crack initiation, Fatigue crack growth, Crack growth retardation

U2 - 10.1016/j.engfracmech.2016.11.013

DO - 10.1016/j.engfracmech.2016.11.013

M3 - Article

SN - 1873-7315

VL - 169

SP - 226

EP - 237

JO - Engineering Fracture Mechanics

JF - Engineering Fracture Mechanics

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