Peridynamic simulation for the laser ignition model of energetic material with cracks.

• The effects of cracks on ignition delay time of energetic material are studied. • Peridynamic non-Fourier heat conduction numerical scheme is applied to the laser ignition model. • The effects of cracks are related to their own distribution and the energy absorbed by the material. The actual ignition process in the artillery barrel is complex, cracks in the energetic materials will inevitably appear due to the influence of various factors, but they are rarely considered in previous experiments and simulations. A laser ignition model of energetic materials considering insulating cracks is constructed. Peridynamic non-Fourier heat conduction numerical scheme is utilized to simulate the laser ignition process of energetic materials with cracks. The applicability of the peridynamic formulation is first verified by comparing the ignition delay time of crack-free energetic material with experimental results. The effects of cracks on ignition delay time in various cases are then investigated mechanistically via simulation results. The results show that cracks affect heat transfer leading to heat accumulation near the crack, which accelerates the temperature rise and shortens the ignition delay time. Moreover, laser power and crack distribution change the influence of cracks on heat transfer. This serves as a numerical reference for the research of the actual launch process in the barrel. [ABSTRACT FROM AUTHOR]