Effect of Blasting Stress Wave on Dynamic Crack Propagation

Stress waves affect the stress field at crack tip and dominate dynamic propagation. Therefore, evaluating influence of blasting on propagation behavior mechanical characteristics is great significance for engineering blasting. In this study, ANSYS/LS-DYNA was used numerical simulation, in which distribution were closely observed. Moreover, ABAQUS applied simulating path calculating intensity factors (DSIFs). The universal function calculated by fractal method. results show that: compressive wave causes to close reflected tensile drives initiate propagate, failure mode mainly failure. velocity varies with time, increases first then decreases, arrest occurs due attenuation dissipation energy. addition, toughness smaller than initiation toughness, pressure waveforms (such as peak pressure, duration, waveforms, wavelengths loading rates) have a DSIFs. It conducive our deep understanding or study dominated fracture, suggesting broad reference further development rock practice.