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

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.

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  • English

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Filing Info

  • Accession Number: 01600616
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 6 2016 11:14AM