Damage-fragmentation transition: Size effect and scaling behavior for impact fragmentation of slender projectiles
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The focus of the present article is on the size effect of a transition region from the damaged to the fragmented phase in impact-induced breakup of a slender projectile. Molecular dynamics simulations of the classic ballistic Taylor test are performed with a simple generic model to explore an extended low energy range. In the simulation setup, flat-ended, monocrystalline, nanoscale projectiles, with a fixed aspect ratio but 10 different diameters, collide perpendicularly with a rough rigid wall. With gradually increasing impact energy, a non-negligible projectile disintegration eventually takes place and is identified with the damage-fragmentation phase transition. These atomistic simulations offer an indispensable tool to gain an insight into damage evolution in the neighborhood of the damage-fragmentation transition resulting in the occurrence of fragmentation at the critical point. A finite size scaling analysis of the average fragment mass is carried out to determine critical expon...ents and dependence of the critical striking velocity upon the slender projectile’s diameter.
Keywords:
Impact fragmentation / slender projectiles / size effect / scaling laws / phase transition / atomistic simulationsSource:
International Journal of Damage Mechanics, 2018, 27, 2, 201-217Publisher:
- SAGE Publications
Funding / projects:
- The author acknowledges a partial financial support by the Ministry of Education, Science and Technological Development of the Republic of Serbia.
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Institut za multidisciplinarna istraživanjaTY - JOUR AU - Mastilović, Sreten PY - 2018 UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/1582 AB - The focus of the present article is on the size effect of a transition region from the damaged to the fragmented phase in impact-induced breakup of a slender projectile. Molecular dynamics simulations of the classic ballistic Taylor test are performed with a simple generic model to explore an extended low energy range. In the simulation setup, flat-ended, monocrystalline, nanoscale projectiles, with a fixed aspect ratio but 10 different diameters, collide perpendicularly with a rough rigid wall. With gradually increasing impact energy, a non-negligible projectile disintegration eventually takes place and is identified with the damage-fragmentation phase transition. These atomistic simulations offer an indispensable tool to gain an insight into damage evolution in the neighborhood of the damage-fragmentation transition resulting in the occurrence of fragmentation at the critical point. A finite size scaling analysis of the average fragment mass is carried out to determine critical exponents and dependence of the critical striking velocity upon the slender projectile’s diameter. PB - SAGE Publications T2 - International Journal of Damage Mechanics T1 - Damage-fragmentation transition: Size effect and scaling behavior for impact fragmentation of slender projectiles EP - 217 IS - 2 SP - 201 VL - 27 DO - 10.1177/1056789516671775 ER -
@article{ author = "Mastilović, Sreten", year = "2018", abstract = "The focus of the present article is on the size effect of a transition region from the damaged to the fragmented phase in impact-induced breakup of a slender projectile. Molecular dynamics simulations of the classic ballistic Taylor test are performed with a simple generic model to explore an extended low energy range. In the simulation setup, flat-ended, monocrystalline, nanoscale projectiles, with a fixed aspect ratio but 10 different diameters, collide perpendicularly with a rough rigid wall. With gradually increasing impact energy, a non-negligible projectile disintegration eventually takes place and is identified with the damage-fragmentation phase transition. These atomistic simulations offer an indispensable tool to gain an insight into damage evolution in the neighborhood of the damage-fragmentation transition resulting in the occurrence of fragmentation at the critical point. A finite size scaling analysis of the average fragment mass is carried out to determine critical exponents and dependence of the critical striking velocity upon the slender projectile’s diameter.", publisher = "SAGE Publications", journal = "International Journal of Damage Mechanics", title = "Damage-fragmentation transition: Size effect and scaling behavior for impact fragmentation of slender projectiles", pages = "217-201", number = "2", volume = "27", doi = "10.1177/1056789516671775" }
Mastilović, S.. (2018). Damage-fragmentation transition: Size effect and scaling behavior for impact fragmentation of slender projectiles. in International Journal of Damage Mechanics SAGE Publications., 27(2), 201-217. https://doi.org/10.1177/1056789516671775
Mastilović S. Damage-fragmentation transition: Size effect and scaling behavior for impact fragmentation of slender projectiles. in International Journal of Damage Mechanics. 2018;27(2):201-217. doi:10.1177/1056789516671775 .
Mastilović, Sreten, "Damage-fragmentation transition: Size effect and scaling behavior for impact fragmentation of slender projectiles" in International Journal of Damage Mechanics, 27, no. 2 (2018):201-217, https://doi.org/10.1177/1056789516671775 . .