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Characterization of Interaction Between Elliptical Subsurface Flaws

[+] Author Affiliations
Kisaburo Azuma, Yinsheng Li, Kunio Hasegawa

Japan Atomic Energy Agency, Tokai-mura, Japan

Paper No. PVP2016-63429, pp. V01BT01A008; 8 pages
doi:10.1115/PVP2016-63429
From:
  • ASME 2016 Pressure Vessels and Piping Conference
  • Volume 1B: Codes and Standards
  • Vancouver, British Columbia, Canada, July 17–21, 2016
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-5036-7
  • Copyright © 2016 by ASME

abstract

Multiple flaws are often observed in engineering structures and components. Interactions between multiple flaws can increase the stress intensity factors. Although fitness-for-service codes provide combination rules to account for these effects, they do not unify the criteria for flaw combinations. To establish a reasonable combination rule, we must identify the parameters that dominate the interaction. This study investigates the interactions of stress intensity factors in two coplanar subsurface flaws in a plate. The plate was subjected to a remote tension acting normal to the flaw surface. For varying shapes and distances of elliptical subsurface flaws, we solved the intensity factors by finite element analyses. Flaw distance and area were identified as important parameters for characterizing the interaction factor between two subsurface flaws.

Copyright © 2016 by ASME

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