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Evaluation of Ductile Crack Propagation Behavior for Subsurface Crack in Cladded Plates Using XFEM

[+] Author Affiliations
Masaki Nagai, Naoki Miura

Central Research Institute of Electric Power Industry, Yokosuka, Japan

Kiminori Murai, Toshio Nagashima

Sophia University, Tokyo, Japan

Paper No. PVP2016-63379, pp. V06AT06A005; 6 pages
doi:10.1115/PVP2016-63379
From:
  • ASME 2016 Pressure Vessels and Piping Conference
  • Volume 6A: Materials and Fabrication
  • Vancouver, British Columbia, Canada, July 17–21, 2016
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-5042-8
  • Copyright © 2016 by ASME

abstract

In petrochemical and nuclear power plants, inner surface of components, such as pressure vessels and piping, which are made of carbon steels or low-alloy steels, is often cladded by austenitic stainless steels to improve the corrosion resistance of those components. In the evaluation of a crack postulated near the inner surface of cladded components, the following two different kinds of cracks are often assumed: One is a surface crack penetrated through cladding and the other is a subsurface crack under cladding. In order to evaluate the structural integrity of those components in a rational manner, it is important to investigate the crack propagation behavior. In particular, it should be evaluated whether a subsurface crack penetrates through cladding or is arrested at the interface between cladding and base metal. In this study, ductile crack propagation analysis for a subsurface elliptical crack in cladded plates was performed using elastic-plastic XFEM, which can model the crack independent of finite elements.

Copyright © 2016 by ASME

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