Property change of transmitted ultrasonic wave due to contact state of fatigue crack face

• Nakahata Kazuyuki

  愛媛大学 大学院理工学研究科生産環境工学専攻

• Takahashi Kanta

  愛媛大学大学院理工学研究科生産環境工学専攻

• Hosokawa Hayato

  愛媛大学工学部環境建設工学科

• Takahashi Manabu

  愛媛大学 大学院理工学研究科生産環境工学専攻

Bibliographic Information

Other Title

• 疲労き裂面の接触状態による透過超音波の波形特性の変化

Abstract

In the case that the fatigue crack face is contacted due to the stress condition, un-derestimation or overlook of the crack might happen in ultrasonic testing. To cope with such a crack closure problem, the nonlinear ultrasonic method is immensely promising. The contact and non-contact behaviors of crack faces generate super-and sub-harmonics arising from interactions with large amplitude incident waves. In this study, an attempt has been made to evaluate fatigue cracks in a structural components using ultrasonic waveforms traveling a long distance. Here, the ultra-sonic waves transmitted through the fatigue crack in a steel specimen were measured while changing the contact state of the crack face. The properties of the measured signals were investigated by comparing to numerical modeling results.

Journal

• Journal of Structural Engineering, A

  Journal of Structural Engineering, A 66A (0), 529-539, 2020

  Japan Society of Civil Engineers

Keywords

• fatigue crack
• interaction of crack face
• long traveling ultrasonic wave
• elastodynamic finite integration technique

Details

• CRID: 1390565134847052416
• NII Article ID: 130007830389
• DOI: 10.11532/structcivil.66a.529
• ISSN: 1881820X
• Text Lang: ja
• Data Source:
  • JaLC
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed