J-R fracture toughness of nuclear piping materials under excessive seismic loading condition

Jin Weon Kim, Sang Bong Lee, Myung Rak Choi, Yun Jae Kim

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

This study investigated the loading rate effect on the fracture resistance under cyclic loading conditions to clearly understand the fracture behavior of piping materials under excessive seismic conditions. J-R fracture toughness tests were conducted under monotonic and cyclic loading conditions at various displacement rates at room temperature (RT) and the operating temperature of nuclear power plants (NPPs), i.e., 316°C. SA508 Gr. 1a lo w-alloy steel (LAS) and SA312 TP316 stainless steel (SS) piping materials were used for the tests. The fracture resistance under a reversible cyclic load was considerably lower than that under monotonic load regardless of test temperature, material, and loading rate. Under both cyclic and monotonic loading conditions, the fracture behavior of SA312 TP316 SS was independent of the loading rate at both RT and 316°C. For SA508 Gr. 1a LAS, the loading rate effect on the fracture behavior was appreciable at 316°C under both cyclic and monotonic loading conditions. However, the loading rate effect diminished when the cyclic load ratio (R) was -1. Thus, it was recognized that the fracture behavior of piping materials, including seismic loading characteristics, can be evaluated when tested under a cyclic load of R = -1 at a quasi-static loading rate.

本文言語English
ホスト出版物のタイトルMaterials and Fabrication
出版社American Society of Mechanical Engineers (ASME)
ISBN(電子版)9780791850428
DOI
出版ステータスPublished - 2016
外部発表はい
イベントASME 2016 Pressure Vessels and Piping Conference, PVP 2016 - Vancouver, Canada
継続期間: 2016 7月 172016 7月 21

出版物シリーズ

名前American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
6A-2016
ISSN(印刷版)0277-027X

Conference

ConferenceASME 2016 Pressure Vessels and Piping Conference, PVP 2016
国/地域Canada
CityVancouver
Period16/7/1716/7/21

ASJC Scopus subject areas

  • 機械工学

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