1 January 1993 Investigation of dynamic stress between blast holes by moire method
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Proceedings Volume 1801, 20th International Congress on High Speed Photography and Photonics; (1993) https://doi.org/10.1117/12.145720
Event: 20th International Congress on High Speed Photography and Photonics, 1992, Victoria, BC, Canada
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.
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Hanhong Zhang, Hanhong Zhang, Zhilong Han, Zhilong Han, } "Investigation of dynamic stress between blast holes by moire method", Proc. SPIE 1801, 20th International Congress on High Speed Photography and Photonics, (1 January 1993); doi: 10.1117/12.145720; https://doi.org/10.1117/12.145720
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