@Article{cmes.2020.07686,
AUTHOR = {Yihua Xiao, Hecheng Wu, Xuecheng Ping},
TITLE = {On the Simulation of Fragmentation During the Process of Ceramic Tile Impacted by Blunt Projectile with SPH Method in LS-DYNA},
JOURNAL = {Computer Modeling in Engineering \& Sciences},
VOLUME = {122},
YEAR = {2020},
NUMBER = {3},
PAGES = {923--954},
URL = {http://www.techscience.com/CMES/v122n3/38381},
ISSN = {1526-1506},
ABSTRACT = {Ceramics are extensively used in protective structures which are often 
subjected to projectile impacts. During an impact process of a ceramic target by a 
projectile, fragmentation occurs in both the target and the projectile. It is challenging to 
simulate such events and predict residual mass and velocity of the projectile. In this work, 
we attempt to use smoothed particle hydrodynamics (SPH) in LS-DYNA to reproduce
fragmentation of the target and the projectile and predict residual mass and velocity of the 
projectile during a projectile impact of a ceramic target. SPH models for an alumina 
ceramic tile impacted by a blunt tungsten heavy alloy projectile are established. SPH 
simulation results of residual mass and velocity of the projectile as well as ejecta and 
bulge movements of the ceramic tile are obtained and compared with experimental data 
and simulation results of other numerical approaches. It is found that SPH simulation can 
properly reproduce the impact fragmentation of the target and the projectile, and shows 
advantages over existing numerical approaches in the prediction accuracy of residual 
mass and velocity. Moreover, effects of some numerical aspects of SPH, including 
particle spacing, contact treatment and parameters in artificial viscosity and smoothing 
length, on simulation results are identified. A simple approach using identical smoothing 
length and balanced artificial viscosity is proposed to reduce particle spacing sensitivity. 
The observed parametric effects and the proposed approach will provide guidance to set 
appropriate parameters values for SPH simulation of impact fragmentation.},
DOI = {10.32604/cmes.2020.07686}
}