Computer Modeling for a Generalized Approach to Measure Impact Damage
Publication: Journal of Engineering Mechanics
Volume 133, Issue 3
Abstract
This paper describes a generalized and rational computational approach to qualitatively measure the level of damage generated by projectiles impacting a system of bumper plates. A single impact damage index (SIDI) model is proposed based on results from numerical simulations using a hydrocode. The model combines the depth of penetration and the size of the holes. A sensitivity study demonstrated that the SIDI is very useful to make relative comparisons between a wide range of impact configurations, high impact velocities, material densities, and projectile shapes and sizes. Additional simulations with two neighbor impacts were conducted to compute a combined damage index and study its sensitivity to neighboring distances. An artificial neural network was developed to rapidly estimate the SIDI for numerous impact configurations and velocities. The approach can be coupled with other methodologies to assess larger-scale damage involving multiple impacts at high velocities.
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Acknowledgments
The writers acknowledge the Missile Defense Agency and the Air Force Office of Scientific Research for sponsoring this effort under Grant No. USAFOSRF49620-02-1-0076. A special thanks to Dr. Arje Nachman of AFOSR for his support and encouragement while serving as Program Manager. The technical assistance from Larry Libersky in relation to the use of the MAGI code is greatly appreciated. The work included in this report served as the Master of Science thesis of the third writer, who patiently monitored and documented the simulations.
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 133 • Issue 3 • March 2007
Pages: 299 - 307
Copyright
© 2007 ASCE.
History
Received: Feb 25, 2005
Accepted: Jul 31, 2006
Published online: Mar 1, 2007
Published in print: Mar 2007
Notes
Note. Associate Editor: Arif Masud
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