Investigation of glass plate failure mechanism subjected to copper and steel projectile impacts
A glass plate was subjected to impact by spherical copper and steel projectiles at low velocities. The glass failure features consisted of a central Hertzian cone made up of comminuted glass and a spider web like cracking pattern around the cone with circumferential and radial cracks. The objecti...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
IIUM Press
2014
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/39242/ http://irep.iium.edu.my/39242/ http://irep.iium.edu.my/39242/1/499-2053-1-PB.pdf |
| Summary: | A glass plate was subjected to impact by spherical copper and steel
projectiles at low velocities. The glass failure features consisted of a central Hertzian
cone made up of comminuted glass and a spider web like cracking pattern around the
cone with circumferential and radial cracks. The objective of the investigation was to
determine if the damage caused by copper projectile impact compared to steel projectile
impact was higher for the same kinetic energy (K.E.) projectiles and the reason for this
phenomenon. For the constant K.E. impact, copper projectile apparently caused higher
damage in glass plate. Higher damage was attributed to projectile contact duration and
the contact area between the projectile and the glass plate. Finite element analysis using
LS-DYNA based upon maximum principal strain failure criterion for laminated glass
model was able to predict the failed material under the impact location and the cracking
pattern in the glass plate for a biased meshing scheme. Radial cracks in glass target were
reported to be 15% higher for copper projectile impact than the steel projectile impact. |
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