Journal Published Online: 05 December 2014
Volume 44, Issue 1

Experimental Research of Crack Propagation in Polymethyl Methacrylate Material Containing Flaws Under Explosive Stress Waves

CODEN: JTEVAB

Abstract

The crack propagation behavior of the material polymethyl methacrylate with flaws under the effects of explosive stress waves were studied using a digital laser dynamic caustics method. Four different kinds of experimental conditions were set: open joints, closed joints, confined pressure around the specimen, and double boreholes. A digital high-speed camera was utilized to record a series of dynamic caustics spots at the tip of the propagation wing cracks. The cracks' paths and the dynamic stress intensity factor (DSIF) at the tip of the two wing cracks are evaluated. Crack patterns, variation of DSIF, and the mechanisms of the wing cracking process are analyzed and discussed. The results provided an effective experimental basis for evaluating and designing directional controlled blasting for excavating rock faces and tunnels.

Author Information

Renshu, Yang
School of Mechanics and Architecture Engineering, China Univ. of Mining and Technology (Beijing), Beijing, CN State Key Laboratory for Geomechanics and Deep Underground Engineering, Beijing, CN
Yanbing, Wang
School of Mechanics and Architecture Engineering, China Univ. of Mining and Technology (Beijing), Beijing, CN
Dongming, Guo
School of Mechanics and Architecture Engineering, China Univ. of Mining and Technology (Beijing), Beijing, CN
Huajun, Xue
School of Mechanics and Architecture Engineering, China Univ. of Mining and Technology (Beijing), Beijing, CN
Pages: 10
Price: $25.00
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Details
Stock #: JTE20140055
ISSN: 0090-3973
DOI: 10.1520/JTE20140055