High Cycle Thermal Fatigue Crack Initiation and Growth Behavior in Simulated BWR Environment

DOI Web Site Web Site 4 Citations 19 References

Bibliographic Information

Other Title
  • ＢＷＲ模擬環境中における高サイクル熱疲労表面き裂の発生・進展・停留挙動｀＊´
  • BWR モギ カンキョウ チュウ ニ オケル コウサイクル ネツ ヒロウ ヒョウメン キレツ ノ ハッセイ シンテン テイリュウ キョドウ

Search this article

Description

At a tee junction point of piping system, hot water and cold water is mixed with each other in a whirl. The vibrating mixing boundary between the hot and cold water causes a temperature fluctuation on an inside surface of the pipe just after the connection point. The temperature fluctuation yields a cyclic thermal stress near the pipe surface and results in the crack initiation. In this study the thermal fatigue tests using disk specimens in simulated BWR environment were performed and the thermal fatigue crack initiation strength was compared with the mechanical fatigue strength. Furthermore the thermal fatigue crack arrest depth was analyzed using the linear fracture mechanics, and the arrest depth was found to be in proportion to the reciprocal root of the frequency of temperature fluctuation, and the experimental results agreed well with the analytical ones.

Journal

Citations (4)*help

See more

References(19)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top