Threshold Characteristics of Short Pulse Loads Causing Fracture in Concrete and Rocks
| Periodical | Applied Mechanics and Materials (Volume 82) |
|---|---|
| Main Theme | Performance, Protection and Strengthening of Structures under Extreme Loading |
| Edited by | Ezio Cadoni and Marco di Prisco |
| Pages | 106-111 |
| DOI | 10.4028/www.scientific.net/AMM.82.106 |
| Citation | Ivan V. Smirnov et al., 2011, Applied Mechanics and Materials, 82, 106 |
| Online since | July, 2011 |
| Authors | Ivan V. Smirnov, Yuri V. Petrov, Yuri V. Sudenkov, Ezio Cadoni |
| Keywords | Concrete, Crack Propagation, Dynamic Fracture, Energy Quantizing, Rock, Short Pulse Loads, Threshold Pulses, Wire Explosion Technique |
| Price | US$ 28,- |
Results of experimental investigation of concrete and rocks under high rate loads of microsecond duration (2.5 ยตs) are presented. Tested samples are rectangular plates (150/150/15 mm) with a notch (70 mm long and 3 mm thick) containing a pre-crack (about 1 mm long). Dynamic loading was created utilizing electric wire explosion technique. An electric wire was placed between the faces of the notch at a distance of 20 mm from the tip of the pre-crack. After the wire explosion the trajectory of the extended crack and the fracture surface were studied. Measured dependence of the crack extension on the loading pulse energy gives the possibility of determining the threshold (minimal) amplitude of the load required to initiate fracture in the studied samples.
