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.
%0 Journal Article
%1 WOS:000263497200009
%A Wittel, F K
%A Carmona, H A
%A Kun, F
%A Herrmann, H J
%C VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
%D 2008
%I SPRINGER
%J INTERNATIONAL JOURNAL OF FRACTURE
%K Comminution} Computer Discrete element method; simulation; {Fragmentation;
%N 1-2
%P 105-117
%R 10.1007/s10704-008-9267-6
%T Mechanisms in impact fragmentation
%V 154
%X 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.
@article{WOS:000263497200009,
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.},
added-at = {2022-05-23T20:00:14.000+0200},
address = {VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS},
author = {Wittel, F K and Carmona, H A and Kun, F and Herrmann, H J},
biburl = {https://www.bibsonomy.org/bibtex/2ef93e45c649b9cd4181201191824b713/ppgfis_ufc_br},
doi = {10.1007/s10704-008-9267-6},
interhash = {e0e4eaf20d00fde2e3198ff74c008ed3},
intrahash = {ef93e45c649b9cd4181201191824b713},
issn = {0376-9429},
journal = {INTERNATIONAL JOURNAL OF FRACTURE},
keywords = {Comminution} Computer Discrete element method; simulation; {Fragmentation;},
note = {Conference on Physical Aspects of Fracture Scaling and Size Effect,
Ascona, SWITZERLAND, MAR 09-13, 2008},
number = {1-2},
pages = {105-117},
publisher = {SPRINGER},
pubstate = {published},
timestamp = {2022-05-23T20:00:14.000+0200},
title = {Mechanisms in impact fragmentation},
tppubtype = {article},
volume = 154,
year = 2008
}