Ddynamic caustic experimental in two borehole study of crack propagation cut blasting
Abstract：A blast loading system using dynamic reflected caustics was used to study V-notch, two borehole blasting with simultaneous initiation. The crack propagation and changes in stress intensity at the crack tips was observed. The crack tips do not meet directly but are deflected and become anisotropic. The crack propagation velocity first decreases, oscillates, and then gradually increases to a peak followed by a decrease until the oscillations stop. The stress in- tensity factor, K1, is maximum at the initial point but then decreases, oscillates, and gradually increases to a second peak. The interaction mechanism between stress wave and crack tip is analyzed qualitatively.
Keywords：two borehole blastingcrack propagationdynamic causticsstress intensity factor
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 868-872 )