Modelling of microparticle hypervelocity oblique impacts on thick targets

Cold spray deposition: Significance of particle impact phenomena

“…The probability that impacts occur onto a grain is always greater than the probability of impacts on grain boundaries, e.g. [29]. This has been hypothesized to be a reason of the observed scale effect.…”

“…(3) the relative damage of small particles is less than the relative damage of large particles. Simulations of phase changes, effects of dynamic hardening and thermal softening on impact of spherical particles have not been able to duplicate the scale effect [29] because impacts of small-sized particles are accompanied by some features characteristic of the small scale as the importance of the non-uniformity of the impacted surface and the structure of materials (e.g. grain structure of metals).…”

“…1. Hypervelocity impacts of particles of intermediate size [26,51] and of micro-particles [15,29,41] have also been studied. In Fig.…”

Computer Simulation in Materials Science and Engineering

“…An erosion algorithm was also implemented to alleviate grid tangling and element degeneracy. This algorithm works by removing Lagrangian cells that have reached a user-prescribed strain (Hayhurst et al 1995). SPH was used to model the projectile because it was assumed that it would undergo very large deformation without the need for additional algorithms such as an erosion algorithm.…”

Модельный Расчет Высокоскоростного Соударения Тел Различной Формы С Массивными Металлическими Преградами

“…Между тем эксперименты показывают, что при ударе более плотным компактным телом по преграде меньшей плотности образуется кратер, несколько вытянутый в направлении удара по сравнению с полусферическим. Численное мо-делирование подтверждает, что этот эффект сохраняется вплоть до экстремально высоких скоростей [23,24]. Для того чтобы учесть эти особенности, необходимо внести определенные изменения в предлагаемую мо-дель.…”