A front tracking algorithm for hypervelocity impact problems with crack growth, large deformations and high strain rates

•We propose a new front tracking method for problems with crack growth.•We propose an automatic crack growth scheme which can describe cracks with particles.•It is the first time to apply the front tracking method to describe the fractures.•The method is better than other interface capture methods in 2D problems.•Good agreement between the numerical results and the experimental data is obtained.

In the present paper, a front tracking algorithm, which includes a front tracking part and a specified crack growth scheme, is proposed for tracking material interfaces and describing the formation and propagation of a crack. Combined with an improved space–time Conservation Element and Solution Element (CE/SE) scheme, the algorithm can simulate high-velocity impact problems with crack growth, large deformations and high strain rates. The present front tracking algorithm shows high accuracy in the numerical test of a single vortex problem. Numerical simulations are also presented for spall fractures in a plate when impacted by a spherical projectile and perforation of a cylindrical Arne tool steel projectile impacting a plate target. The numerical results are in good agreement with the corresponding experimental observations. It is demonstrated that the present algorithm is feasible and reliable for analyzing fractures.