An analytical model for perforation of ceramic/multi-layered planar woven fabric targets by blunt projectiles
✍ Scribed by S. Feli; M.H. Yas; M.R. Asgari
- Publisher
- Elsevier Science
- Year
- 2011
- Tongue
- English
- Weight
- 818 KB
- Volume
- 93
- Category
- Article
- ISSN
- 0263-8223
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✦ Synopsis
An analytical model has been developed in this paper for perforation of ceramic/multi-layer woven fabric targets by blunt projectiles. In previous Chocron-Galvez analytical model the semi-angle of ceramic conoid is constant and the strain rate effects are also neglected in the stress-strain behavior of the yarns and only strain energy absorbed by the yarns is considered.
In this paper which is an improvement to the Chocron-Galvez analytical model for modeling the fragmented ceramic conoid, the Zaera-Sanchez-Galvez analytical model has been used and the semi-angle of ceramic conoid has been modified. For modeling the back-up woven-fabric material and deformation of yarns during perforation, the kinetic and strain energy of yarns has been determined. In the stress-strain relation of yarns, the effect of the strain rate is considered. Furthermore, a failure model based on the energy absorbed until failure by woven fabric is also used. Residual velocity, velocity-time history of projectile, residual mass of fragmented ceramic conoid, penetration depth until failure of yarns and energy absorbed by woven fabric are all estimated by new analytical model. Velocity-time history of the projectile shows a good agreement with the Chocron-Galvez numerical model. Also, near the ballistic limit velocity, prediction of residual velocity of new model is better than Chocron-Galvez analytical model.