Applicability of reference stress-based J estimates to semi-elliptical surface crack problems

Yun Jae Kim, J. S. Kim, D. J. Shim, Y. J. Kim

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

This paper discusses the applicability of the reference stress method to estimate J along the semi-elliptical surface crack front. For a systematic investigation, two steps are taken in the present work. The first step involves investigation of the dependence of angular variations in normalized J (with respect to its elastic value) along the semi-elliptical surface crack front on the geometry, loading mode and loading magnitude. In the second step, the error associated with the reference stress-based J estimates is investigated. It is found that angular variations in normalized J are strongly dependent on the geometry, loading mode and loading magnitude. As the application of the reference stress approach to semi-elliptical surface cracks implies proportional increases in the normalized J, the present results pose a question on the applicability of the reference stress approach to estimate J for surface cracks. However, it is also found that the reference stress approach can still provide reasonably accurate J results from an engineering point of view, provided that the maximum J along the crack front is accurately estimated. In this respect, investigation of the error in the estimated J in the present work suggests that the reference stress approach is an effective engineering tool for estimating crack driving force along the semi-elliptical surface crack front, provided that the reference stress is properly defined.

Original languageEnglish
Pages (from-to)245-260
Number of pages16
JournalJournal of Strain Analysis for Engineering Design
Volume39
Issue number3
DOIs
Publication statusPublished - 2004 May 1
Externally publishedYes

Fingerprint

Surface Crack
Cracks
Estimate
Crack
Engineering
Geometry
Driving Force
Directly proportional
Imply
Dependent

Keywords

  • J estimation
  • Reference stress method
  • Semi-elliptical surface crack

ASJC Scopus subject areas

  • Modelling and Simulation
  • Mechanics of Materials
  • Mechanical Engineering
  • Applied Mathematics

Cite this

Applicability of reference stress-based J estimates to semi-elliptical surface crack problems. / Kim, Yun Jae; Kim, J. S.; Shim, D. J.; Kim, Y. J.

In: Journal of Strain Analysis for Engineering Design, Vol. 39, No. 3, 01.05.2004, p. 245-260.

Research output: Contribution to journalArticle

@article{0d14da186dcc4b13af32c64914d4fbc6,
title = "Applicability of reference stress-based J estimates to semi-elliptical surface crack problems",
abstract = "This paper discusses the applicability of the reference stress method to estimate J along the semi-elliptical surface crack front. For a systematic investigation, two steps are taken in the present work. The first step involves investigation of the dependence of angular variations in normalized J (with respect to its elastic value) along the semi-elliptical surface crack front on the geometry, loading mode and loading magnitude. In the second step, the error associated with the reference stress-based J estimates is investigated. It is found that angular variations in normalized J are strongly dependent on the geometry, loading mode and loading magnitude. As the application of the reference stress approach to semi-elliptical surface cracks implies proportional increases in the normalized J, the present results pose a question on the applicability of the reference stress approach to estimate J for surface cracks. However, it is also found that the reference stress approach can still provide reasonably accurate J results from an engineering point of view, provided that the maximum J along the crack front is accurately estimated. In this respect, investigation of the error in the estimated J in the present work suggests that the reference stress approach is an effective engineering tool for estimating crack driving force along the semi-elliptical surface crack front, provided that the reference stress is properly defined.",
keywords = "J estimation, Reference stress method, Semi-elliptical surface crack",
author = "Kim, {Yun Jae} and Kim, {J. S.} and Shim, {D. J.} and Kim, {Y. J.}",
year = "2004",
month = "5",
day = "1",
doi = "10.1243/030932404323042678",
language = "English",
volume = "39",
pages = "245--260",
journal = "Journal of Strain Analysis for Engineering Design",
issn = "0309-3247",
publisher = "SAGE Publications Ltd",
number = "3",

}

TY - JOUR

T1 - Applicability of reference stress-based J estimates to semi-elliptical surface crack problems

AU - Kim, Yun Jae

AU - Kim, J. S.

AU - Shim, D. J.

AU - Kim, Y. J.

PY - 2004/5/1

Y1 - 2004/5/1

N2 - This paper discusses the applicability of the reference stress method to estimate J along the semi-elliptical surface crack front. For a systematic investigation, two steps are taken in the present work. The first step involves investigation of the dependence of angular variations in normalized J (with respect to its elastic value) along the semi-elliptical surface crack front on the geometry, loading mode and loading magnitude. In the second step, the error associated with the reference stress-based J estimates is investigated. It is found that angular variations in normalized J are strongly dependent on the geometry, loading mode and loading magnitude. As the application of the reference stress approach to semi-elliptical surface cracks implies proportional increases in the normalized J, the present results pose a question on the applicability of the reference stress approach to estimate J for surface cracks. However, it is also found that the reference stress approach can still provide reasonably accurate J results from an engineering point of view, provided that the maximum J along the crack front is accurately estimated. In this respect, investigation of the error in the estimated J in the present work suggests that the reference stress approach is an effective engineering tool for estimating crack driving force along the semi-elliptical surface crack front, provided that the reference stress is properly defined.

AB - This paper discusses the applicability of the reference stress method to estimate J along the semi-elliptical surface crack front. For a systematic investigation, two steps are taken in the present work. The first step involves investigation of the dependence of angular variations in normalized J (with respect to its elastic value) along the semi-elliptical surface crack front on the geometry, loading mode and loading magnitude. In the second step, the error associated with the reference stress-based J estimates is investigated. It is found that angular variations in normalized J are strongly dependent on the geometry, loading mode and loading magnitude. As the application of the reference stress approach to semi-elliptical surface cracks implies proportional increases in the normalized J, the present results pose a question on the applicability of the reference stress approach to estimate J for surface cracks. However, it is also found that the reference stress approach can still provide reasonably accurate J results from an engineering point of view, provided that the maximum J along the crack front is accurately estimated. In this respect, investigation of the error in the estimated J in the present work suggests that the reference stress approach is an effective engineering tool for estimating crack driving force along the semi-elliptical surface crack front, provided that the reference stress is properly defined.

KW - J estimation

KW - Reference stress method

KW - Semi-elliptical surface crack

UR - http://www.scopus.com/inward/record.url?scp=2942582407&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=2942582407&partnerID=8YFLogxK

U2 - 10.1243/030932404323042678

DO - 10.1243/030932404323042678

M3 - Article

VL - 39

SP - 245

EP - 260

JO - Journal of Strain Analysis for Engineering Design

JF - Journal of Strain Analysis for Engineering Design

SN - 0309-3247

IS - 3

ER -