Journal
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS
Volume 206, Issue 1, Pages 89-95Publisher
SPRINGER HEIDELBERG
DOI: 10.1140/epjst/e2012-01590-6
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- French National Agency for Research (ANR)
- CEA
- DAM
- GRAMAT
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In the present work, an experimental method named the rocking spalling test is proposed to investigate the crack-propagation velocity in concrete and rock-like materials under dynamic tensile loading. This method is based on the use of double-notched specimens loaded in spalling tests. A compressive pulse is transmitted to a rectangular specimen by means of a Hopkinson bar. It is reflected as a tensile wave on the opposite free surface of the sample. A large notch provides a rocking effect of the rear part of the specimen whereas a short notch is used to trigger a single unstable crack. This experimental configuration has been optimized through a series of numerical simulations. Finally, a series of tests have been conducted on dry and wet concrete specimens. Crack gauges and ultra-high speed camera coupled to Digital Image Correlation have been used to characterize the crack speed in dry and wet concrete samples.
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