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.