High-speed photography and digital optical measurement techniques for geomaterials: Fundamentals and Applications

H. Z. Xing, Q. B. Zhang, C. H. Braithwaite, B. Pan, J. Zhao

Research output: Contribution to journalReview ArticleResearchpeer-review

40 Citations (Scopus)

Abstract

Geomaterials (i.e. rock, sand, soil and concrete) are increasingly being encountered and used in extreme environments, in terms of the pressure magnitude and the loading rate. Advancing the understanding of the mechanical response of materials to impact loading relies heavily on having suitable high-speed diagnostics. One such diagnostic is high-speed photography, which combined with a variety of digital optical measurement techniques can provide detailed insights into phenomena including fracture, impact, fragmentation and penetration in geological materials. This review begins with a brief history of high-speed imaging. Section 2 discusses of the current state of the art of high-speed cameras, which includes a comparison between charge-coupled device and complementary metal-oxide semiconductor sensors. The application of high-speed photography to geomechanical experiments is summarized in Sect. 3. Section 4 is concerned with digital optical measurement techniques including photoelastic coating, Moiré, caustics, holographic interferometry, particle image velocimetry, digital image correlation and infrared thermography, in combination with high-speed photography to capture transient phenomena. The last section provides a brief summary and discussion of future directions in the field.

Original languageEnglish
Pages (from-to)1611-1659
Number of pages49
JournalRock Mechanics and Rock Engineering
Volume50
Issue number6
DOIs
Publication statusPublished - 1 Jun 2017

Keywords

  • Digital optical measurement
  • Dynamic loading
  • Fracturing
  • High strain rate
  • High-speed photography

Cite this