Experimental and Numerical Investigation on Nonideal Detonation of Aluminized Emulsion Explosives

Emulsion explosives exhibit a strong nonideal detonation behavior. Their blast performance is commonly enhanced by inserting additives, such as aluminum powders. To investigate the nonideal detonation properties of aluminized emulsion explosives, a series of tests are conducted for emulsion explosives with 5 $$\%$$ of an aluminum powder additive using mortar confinement. The detonation velocity and the profile of the detonation front for charges of different diameters are measured. Then, the ignition and growth (I&G) model is employed to numerically investigate the detonation properties of aluminized emulsion explosives based on experimental results. A procedure combining the optimization LS-OPT code with the LS-DYNA hydrocode is first developed to calibrate the parameters of the I&G model. Then, the detonation pressure and temperature of charges of different diameters are predicted using the calibrated parameters. The results are in line with the existing literature data.