The influence of a non-aligned semi-elliptical surface crack on a quarter-circle corner crack in an infinitely large plate under uniaxial tension

M. Perl, Q. Ma, C. Levy

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Scopus citations

Abstract

The evaluation of non-aligned multiple cracks is required in various fitness-for-service codes. For non-aligned parallel cracks, on-site inspection needs to decide whether the cracks should be treated as coalesced or separate multiple cracks for Fitness-for-Service. In the existing literature, criteria and standards for the adjustment of multiple nonaligned cracks are very source dependent, and those criteria and standards are often derived from on-site service experience without rigorous and systematic verification. Based on this observation, the authors previously reported on the effect between an edge and an embedded parallel crack in 2-D scenarios and, more recently, in 3-D scenarios of circular cracks. Since realistic crack configurations detected using non-destructive methods are generally 3-D in nature, the study of 3-D effect of non-aligned cracks with different shapes is deemed necessary in order to obtain more practical guidance in the usage of rules speculated in Fitness-for-Service codes. In this study, a quarter-circle corner crack is considered to interact with a semi-elliptic non-aligned surface flaw in an infinitely large plate under uniaxial tension. While keeping the geometry of the quarter-circle corner crack unchanged, a pair of horizontal (H) and vertical (S) separation distances between the two cracks is chosen followed by a detailed analysis of the effect of crack shape on the 3D SIFs for various embedded semi-elliptical cracks. The analysis is repeated for various combinations of separation distances S and H. The results from this study are collectively significant to the understanding of the correlation between the criteria and standards in Fitness-for-Service community and the consequence of their usage in engineering practice.

Original languageEnglish
Title of host publicationDesign and Analysis
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791850398
DOIs
StatePublished - 1 Jan 2016
EventASME 2016 Pressure Vessels and Piping Conference, PVP 2016 - Vancouver, Canada
Duration: 17 Jul 201621 Jul 2016

Publication series

NameAmerican Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
Volume3
ISSN (Print)0277-027X

Conference

ConferenceASME 2016 Pressure Vessels and Piping Conference, PVP 2016
Country/TerritoryCanada
CityVancouver
Period17/07/1621/07/16

Keywords

  • Fitness-for Service
  • Non-aligned
  • Quarter-Circle Corner Crack
  • Semi-elliptical crack
  • Stress Intensity Factors

ASJC Scopus subject areas

  • Mechanical Engineering

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