“…However, for dynamic problems, the efficiency of the RITSS approach was reduced somewhat by the need for sufficiently small steps, comparable to those in CEL, thus negating the benefit of the implicit calculation approach. Other methods, e.g., the Smoothed Particle Hydrodynamics (SPH) [41][42][43], Material Point Method (MPM) [44,45], and Particle Finite Element Method (PFEM) [46,47], fall in the latter category.…”