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001-es BibID:	BIBFORM085463
Első szerző:	Behera, Bhupalendra
Cím:	Fragmentation of a circular disc by impact on a frictionless plate / Bhupalendra Behera, Ferenc Kun, Sean McNamara, Hans J. Herrmann
Dátum:	2005
ISSN:	0953-8984 1361-648X
Megjegyzések:	The break-up of a two-dimensional circular disc by normal and oblique impact on a hard frictionless plate is investigated by molecular dynamics simulations. The disc is composed of numerous unbreakable randomly shaped convex polygons connected together by simple elastic beams that break when bent or stretched beyond a certain limit. It is found that for both normal and oblique impacts the crack patterns are the same and depend solely on the normal component of the impact velocity. Analysing the pattern of breakage, amount of damage, fragment masses and velocities, we show the existence of a critical velocity which separates two regimes of the impact process: below the critical point only a damage cone is formed at the impact site (damage), cleaving of the particle occurs at the critical point, while above the critical velocity the disc breaks into several pieces (fragmentation). In the limit of very high impact velocities the disc suffers complete disintegration (shattering) into many small fragments. In agreement with experimental results, fragment masses are found to follow the Gates-Gaudin-Schuhmann distribution (power law) with an exponent independent of the velocity and angle of impact. The velocity distribution of fragments exhibits an interesting anomalous scaling behaviour when changing the impact velocity and the size of the disc.
Tárgyszavak:	Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	Journal of Physics-Condensed Matter. - 17 : 24 (2005), p. S2439-S2456. -
További szerzők:	Kun Ferenc (1966-) (fizikus) McNamara, Sean Herrmann, Hans J.
Pályázati támogatás:	M 041537 OTKA T049209 OTKA
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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