Investigation of Propagation and Interference Behavior of Surface Fatigue Cracks under Rotating Bending Fatigue by .MU.CT Technique with Synchrotron Radiation

DOI Web Site 1 Citations 12 References
  • MASAKI Kiyotaka
    Dept. of Mechanical Systems Eng., Okinawa National College of Tech.
  • SANO Yuji
    Power and Industrial Systems Res. and Dept. Center, Toshiba Corporation
  • OCHI Yasuo
    Dept. of Mechanical Eng. & Intelligent Systems, Univ. of Electro-Communications
  • AKITA Koichi
    Dept. of Mech. Systems Eng., Tokyo City Univ.
  • KAJIWARA Kentaro
    Japan Synchrotron Radiation Res. Inst.
  • ADACHI Takafumi
    Aerospace Company, Eng. and Development Center, Fuji Heavy Industries, LTD.

Bibliographic Information

Other Title
  • 回転曲げ疲労条件下における複数き裂の進展・干渉挙動の放射光μＣＴを用いた評価
  • カイテン マゲ ヒロウ ジョウケン カ ニ オケル フクスウ キレツ ノ シンテン カンショウ キョドウ ノ ホウシャコウ ミュー CT オ モチイタ ヒョウカ
  • Investigation of Propagation and Interference Behavior of Surface Fatigue Cracks under Rotating Bending Fatigue by μCT Technique with Synchrotron Radiation

Search this article

Description

Fatigue crack propagation behavior is essential to investigate the mechanism of fatigue fracture. The replication technique has been used to observe the behavior on the surface of various materials; however, the technique does not provide the information on the shape of cracks inside materials. In the present study, the authors have attempted micro computed tomography (μCT) with synchrotron radiation of SPring-8 to observe the cracks inside the specimens. Cracks were introduced through rotating-bending fatigue loading on aircraft aluminum alloy A7050-T7451 specimens. The crack images were intermittently visualized by μCT during the propagation. The interference and coalescence of the two fatigue cracks were evaluated, which were closely located in a plane or parallel planes perpendicular to the axis of each specimen. Fatigue crack propagation rates were calculated using the pairs of crack images with different fatigue cycles. Stress intensity factors were estimated by the Paris's law with the calculated crack propagation rate, which revealed that the high points in stress intensity factor corresponded with those by other researchers for the axial loading of plate specimens.

Journal

Citations (1)*help

See more

References(12)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top