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Investigation on Fatigue Curve Against Cyclic Loads of an Earthquake for Piping Components

[+] Author Affiliations
Masao Uesaka

Tokyo Electric Power Company, Tokyo, Japan

Nobuyuki Kojima

Mitsubishi Heavy Industries, Ltd., Kobe, Japan

Itaru Muroya

Mitsubishi Heavy Industries, Ltd., Takasago, Hyogo, Japan

Hiroshi Nomura

Hitachi-GE Nuclear Energy, Ltd., Hitachi, Ibaraki, Japan

Junichi Yamazaki

Toshiba Corporation Power Systems Company, Yokohama, Japan

Akihito Otani

IHI Corporation, Yokohama, Japan

Paper No. PVP2014-28234, pp. V008T08A023; 10 pages
doi:10.1115/PVP2014-28234
From:
  • ASME 2014 Pressure Vessels and Piping Conference
  • Volume 8: Seismic Engineering
  • Anaheim, California, USA, July 20–24, 2014
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-4607-0
  • Copyright © 2014 by ASME

abstract

In Japan, seismic assessments considered aging phenomena have been conducted as part of activities for aging measures of nuclear power plants. In the activities, it is found that FAC (Flow Accelerated Corrosion) of piping components made of carbon steel impact on seismic integrity because of decreasing a cross section of piping. Therefore, many destructive tests of piping have been conducted in Japan and the other countries.

At first, factors on which did not focus in the past destructive test have been extracted in this investigation. displacement controlled cyclic tests of piping components which focused on extracted factors have been conducted additionally in order to provide enough test data for past destructive test data of piping components. Moreover, fatigue curve for practical evaluation of piping components made of carbon steel has been settled after obtained test data were put in order including past destructive test data of piping components from a point of fatigue.

Copyright © 2014 by ASME

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