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Proceedings Paper

Investigation of dynamic stress between blast holes by moire method
Author(s): Hanhong Zhang; Zhilong Han
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Paper Abstract

The dynamic elastic stress between two blast holes was investigated by means of high speed moire photography in order to find out the mechanism of crack generation and propagation. From sequences of moire patterns the curves of (sigma) (t) at different positions between two holes were obtained which shows that the stress at the midpoint of the two holes is always obviously smaller than that on the wall of the two holes. This means that the crack will generate on the wall of a blast hole first and then propagate towards the neighboring holes.

Paper Details

Date Published: 1 January 1993
PDF: 7 pages
Proc. SPIE 1801, 20th International Congress on High Speed Photography and Photonics, (1 January 1993); doi: 10.1117/12.145720
Show Author Affiliations
Hanhong Zhang, Univ. of Science and Technology of China (China)
Zhilong Han, Univ. of Science and Technology of China (China)


Published in SPIE Proceedings Vol. 1801:
20th International Congress on High Speed Photography and Photonics
John Marks Dewey; Roberto G. Racca, Editor(s)

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