Mechanisms in impact fragmentation

F. K. Wittel, H. A. Carmona, F. Kun, H. J. Herrmann

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

The brittle fragmentation of spheres is studied numerically by a 3D Discrete Element Model. Large scale computer simulations are performed with models that consist of agglomerates of many spherical particles, interconnected by beam-truss elements. We focus on a detailed description of the fragmentation process and study several fragmentation mechanisms involved. The evolution of meridional cracks is studied in detail. These cracks are found to initiate in the inside of the specimen with quasi-periodic angular distribution and give a broad peak in the fragment mass distribution for large fragments that can be fitted by a two-parameter Weibull distribution. The results prove to be independent of the degree of disorder in the model, but mean fragment sizes scale with velocity. Our results reproduce many experimental observations of fragment shapes, impact energy dependence or mass distribution, and significantly improve the understanding of the fragmentation process for impact fracture since we have full access to the failure conditions and evolution.

Original languageEnglish
Pages (from-to)105-117
Number of pages13
JournalInternational Journal of Fracture
Volume154
Issue number1-2
DOIs
Publication statusPublished - 2008

Fingerprint

Fragmentation
Fragment
Cracks
Crack
Angular distribution
Weibull distribution
Discrete Elements
Weibull Distribution
Disorder
Two Parameters
Computer Simulation
Computer simulation
Model
Energy

Keywords

  • Comminution
  • Computer simulation
  • Discrete element method
  • Fragmentation

ASJC Scopus subject areas

  • Mechanics of Materials
  • Computational Mechanics
  • Modelling and Simulation

Cite this

Wittel, F. K., Carmona, H. A., Kun, F., & Herrmann, H. J. (2008). Mechanisms in impact fragmentation. International Journal of Fracture, 154(1-2), 105-117. https://doi.org/10.1007/s10704-008-9267-6

Mechanisms in impact fragmentation. / Wittel, F. K.; Carmona, H. A.; Kun, F.; Herrmann, H. J.

In: International Journal of Fracture, Vol. 154, No. 1-2, 2008, p. 105-117.

Research output: Contribution to journalArticle

Wittel, FK, Carmona, HA, Kun, F & Herrmann, HJ 2008, 'Mechanisms in impact fragmentation', International Journal of Fracture, vol. 154, no. 1-2, pp. 105-117. https://doi.org/10.1007/s10704-008-9267-6
Wittel, F. K. ; Carmona, H. A. ; Kun, F. ; Herrmann, H. J. / Mechanisms in impact fragmentation. In: International Journal of Fracture. 2008 ; Vol. 154, No. 1-2. pp. 105-117.
@article{4a09653f02e840c88084d65557f04f4d,
title = "Mechanisms in impact fragmentation",
abstract = "The brittle fragmentation of spheres is studied numerically by a 3D Discrete Element Model. Large scale computer simulations are performed with models that consist of agglomerates of many spherical particles, interconnected by beam-truss elements. We focus on a detailed description of the fragmentation process and study several fragmentation mechanisms involved. The evolution of meridional cracks is studied in detail. These cracks are found to initiate in the inside of the specimen with quasi-periodic angular distribution and give a broad peak in the fragment mass distribution for large fragments that can be fitted by a two-parameter Weibull distribution. The results prove to be independent of the degree of disorder in the model, but mean fragment sizes scale with velocity. Our results reproduce many experimental observations of fragment shapes, impact energy dependence or mass distribution, and significantly improve the understanding of the fragmentation process for impact fracture since we have full access to the failure conditions and evolution.",
keywords = "Comminution, Computer simulation, Discrete element method, Fragmentation",
author = "Wittel, {F. K.} and Carmona, {H. A.} and F. Kun and Herrmann, {H. J.}",
year = "2008",
doi = "10.1007/s10704-008-9267-6",
language = "English",
volume = "154",
pages = "105--117",
journal = "International Journal of Fracture",
issn = "0376-9429",
publisher = "Springer Netherlands",
number = "1-2",

}

TY - JOUR

T1 - Mechanisms in impact fragmentation

AU - Wittel, F. K.

AU - Carmona, H. A.

AU - Kun, F.

AU - Herrmann, H. J.

PY - 2008

Y1 - 2008

N2 - The brittle fragmentation of spheres is studied numerically by a 3D Discrete Element Model. Large scale computer simulations are performed with models that consist of agglomerates of many spherical particles, interconnected by beam-truss elements. We focus on a detailed description of the fragmentation process and study several fragmentation mechanisms involved. The evolution of meridional cracks is studied in detail. These cracks are found to initiate in the inside of the specimen with quasi-periodic angular distribution and give a broad peak in the fragment mass distribution for large fragments that can be fitted by a two-parameter Weibull distribution. The results prove to be independent of the degree of disorder in the model, but mean fragment sizes scale with velocity. Our results reproduce many experimental observations of fragment shapes, impact energy dependence or mass distribution, and significantly improve the understanding of the fragmentation process for impact fracture since we have full access to the failure conditions and evolution.

AB - The brittle fragmentation of spheres is studied numerically by a 3D Discrete Element Model. Large scale computer simulations are performed with models that consist of agglomerates of many spherical particles, interconnected by beam-truss elements. We focus on a detailed description of the fragmentation process and study several fragmentation mechanisms involved. The evolution of meridional cracks is studied in detail. These cracks are found to initiate in the inside of the specimen with quasi-periodic angular distribution and give a broad peak in the fragment mass distribution for large fragments that can be fitted by a two-parameter Weibull distribution. The results prove to be independent of the degree of disorder in the model, but mean fragment sizes scale with velocity. Our results reproduce many experimental observations of fragment shapes, impact energy dependence or mass distribution, and significantly improve the understanding of the fragmentation process for impact fracture since we have full access to the failure conditions and evolution.

KW - Comminution

KW - Computer simulation

KW - Discrete element method

KW - Fragmentation

UR - http://www.scopus.com/inward/record.url?scp=60949105671&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=60949105671&partnerID=8YFLogxK

U2 - 10.1007/s10704-008-9267-6

DO - 10.1007/s10704-008-9267-6

M3 - Article

VL - 154

SP - 105

EP - 117

JO - International Journal of Fracture

JF - International Journal of Fracture

SN - 0376-9429

IS - 1-2

ER -