Method for successive photographing of rapid crack bifurcation by means of high-speed holographic microscopy

S. Suzuki, Kenichi Sakaue, Y. Morita, T. Mori

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

High-speed holographic microscopy is applied to take three successive photographs of rapidly bifurcating cracks. A crack propagates in a PMMA specimen at a speed more than 600 m/s, and bifurcates into two cracks in the observation area at the center of the specimen. The position at which the crack bifurcates is controlled by varying the tensile stress applied to the specimen. When it bifurcates, the fast propagating crack is recorded as three holograms. The holograms reconstruct the real images of the crack, which are photographed through a conventional microscope. From the photographs, crack speed before and after bifurcation is obtained. Crack speed after bifurcation is slightly lower than that before bifurcation. Crack opening displacement (COD) is also measured along a crack both before and after bifurcation. The COD before bifurcation is proportional to square root of the distance from the crack tip. After bifurcation, the COD of a mother crack is proportional to square root of the distance from the nominal tip of the mother crack. However, the CODs of two branch cracks are not always proportional to square root of the distance from each of the crack tips.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Pages480-487
Number of pages8
Volume4183
DOIs
Publication statusPublished - 2001
Externally publishedYes
Event24th International Congress on High-Speed Photography and Photonics - Sendai, Japan
Duration: 2000 Sep 242000 Sep 29

Other

Other24th International Congress on High-Speed Photography and Photonics
CountryJapan
CitySendai
Period00/9/2400/9/29

Fingerprint

Microscopic examination
cracks
high speed
microscopy
Cracks
crack opening displacement
crack tips
photographs
Holograms
Crack tips
tensile stress
Tensile stress
microscopes
Microscopes

Keywords

  • Crack bifurcation
  • Fast propagating crack
  • Fracture mechanics
  • High-speed photography
  • Holography
  • Microscopy

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Suzuki, S., Sakaue, K., Morita, Y., & Mori, T. (2001). Method for successive photographing of rapid crack bifurcation by means of high-speed holographic microscopy. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 4183, pp. 480-487) https://doi.org/10.1117/12.424315

Method for successive photographing of rapid crack bifurcation by means of high-speed holographic microscopy. / Suzuki, S.; Sakaue, Kenichi; Morita, Y.; Mori, T.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 4183 2001. p. 480-487.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Suzuki, S, Sakaue, K, Morita, Y & Mori, T 2001, Method for successive photographing of rapid crack bifurcation by means of high-speed holographic microscopy. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 4183, pp. 480-487, 24th International Congress on High-Speed Photography and Photonics, Sendai, Japan, 00/9/24. https://doi.org/10.1117/12.424315
Suzuki S, Sakaue K, Morita Y, Mori T. Method for successive photographing of rapid crack bifurcation by means of high-speed holographic microscopy. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 4183. 2001. p. 480-487 https://doi.org/10.1117/12.424315
Suzuki, S. ; Sakaue, Kenichi ; Morita, Y. ; Mori, T. / Method for successive photographing of rapid crack bifurcation by means of high-speed holographic microscopy. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 4183 2001. pp. 480-487
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