Journal article
Load spreading and penetration resistance of layered structures—a numerical study
International journal of impact engineering, Vol.30(6), pp.593-615
2004
Handle:
https://hdl.handle.net/2376/110798
Abstract
The objectives of this study were to gain insight into the penetration resistance of layered structures, and to examine the effects of layer damage and imperfect interfaces on load spreading and projectile defeat capabilities of the layers. To investigate the overall penetration process instead of just the terminal state, we examined the time history of the energy transfer between the projectile and the target, and between the layer and the substrate. Under idealized conditions, without layer damage or an imperfect interface, a target with a single thick high-strength, high-wave-speed layer offers the best penetration resistance. The high impedance and strength of the layer enhance the projectile defeat capability of the target; more impact energy is dissipated in the projectile and less energy is delivered to the target. The high wave speed of the layer allows the impact load and energy imparted to the target to be absorbed more quickly and distributed widely in the substrate. Both layer damage and an imperfect interface degrade the target's capability to defeat the projectile and to spread the load. However, the former has a more detrimental effect than the latter.
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Details
- Title
- Load spreading and penetration resistance of layered structures—a numerical study
- Creators
- J.R Robbins - Institute for Shock Physics, Washington State University, Pullman, WA 99164-2816, USAJ.L Ding - Institute for Shock Physics, Washington State University, Pullman, WA 99164-2816, USAY.M Gupta - Institute for Shock Physics, Washington State University, Pullman, WA 99164-2816, USA
- Publication Details
- International journal of impact engineering, Vol.30(6), pp.593-615
- Academic Unit
- Physics and Astronomy, Department of; Mechanical and Materials Engineering, School of
- Publisher
- Elsevier Ltd
- Identifiers
- 99900546915601842
- Language
- English
- Resource Type
- Journal article