M. Riad, A.I. Fayed, A.A. Salah, S.2020-02-062020-02-0620031. Landkof, B. and Goldsmith, W., "Petalling of Thin Metallic Plates During Penetration by Cylindro-Conical Projectiles", Int. J. Solids Struct., Vol. 21, pp. 245-260 (1985). device Proceedings of the 10° ASAT Conference, 13-15 May 2003 Paper ST- 8 421 2. Taylor, W. A. and Vinson, J. R., "Modeling Ballistic Impact into Flexible Materials", J. AIAA, Vol. 28, No. 12, PP. (1992) 3. Waclawik, S., "Technology and Design Trends in U.S. Army Body Armor Board", Personal Armor System Symp. [PASS 98], Colchester, UK (1998). 4. Paul, B. and Zaid, M., "Mechanics of High Speed Projectile Perforation", J. Franklin Inst., Vol. 264, pp. 117-126 (1957). 5. Paul, B. and Zaid, M., "Normal Perforation of Thin Plates by Truncated Conical Projectiles', J. Franklin Inst., Vol. 265, pp. 317-335 (1958). 6. Vinson, J. R. and Zukas, J. A.," On the Ballistic Impact of Textile Body Armor", J. Appl. Mech., Vol. 42, pp. 263-268 (1975). 7. Zhu, G., Goldsmith, W. and Dharan, C. K., "Penetration of Laminated Kevlar by projectilesII. Analytical Model", Int. J. Solid Struct., Vol. 29, No.4, pp. 421-436 (1992). 8. Cunniff, P.M., " A Semi-empirical Model for the Ballistic Impact Performance of Textile Based Personnal Armor", J. Textile Res., Vol. 66, No.1, pp. 45-59 (1992). 9. Slepyan, L. I. and Stepanenko, M. V., "Penetration of Metal-Fabrics Composites by Small Projectiles", Personal Armor System Symp. (PASS 98), Colchester, U.K. (1998). 10. Salah, S. A., "Ballistic Resistance of Selected Composites and Textiles", M. Sc. Thesis, M.T.C., Cairo, Egypt (2002). 11. Johnson, W. " Impact Strength of Material", Ch. 6, pp. 250-280, Edward Arnold (publishers) Ltd. (1972). 12. Calder, C. A. and Goldsmith, W., "Plastic Deformation and Perforation of Thin Plates Resulting form Projectile Impact", Int. J. Solids Struct., Vol. 7, pp. 863-881, U. K. (1971). 13. Riad, A. M., "Penetration of Thin Plates by Projectiles', M. Sc. Thesis, M.T.C., Cairo, Egypt (1990). 14. Shim, V. P., Tan, V. B. and Tay, T. E., "Modelling Deformation and Damage Characteristics of Woven Fabric under Small Projectile Impact" Int. J. Impact Engng. ,Vol. 16, No. 4, pp 585-605 (1995).https://t.ly/y5Yw7MSA Google ScholarIn this paper, an experimental program has been conducted to study the normal perforation of a small caliber projectile into metal/composite targets. This program is concerned with the determination of ballistic resistance for a set of targets, consisting of kevlar/epoxy composite with different thicknesses faced by 1.6 mm-thick duralumin plates. The used textiles (kevlar129) for manufacturing the composites have a new weave shape (3D weaver"'), which permits the epoxy resin to diffuse through it. In addition, tensile tests of manufactured composite specimens are performed to determine their mechanical properties. An analytical model has been presented to describe the penetration process of metal/composite lightweight targets and to evaluate their ballistic resistance against small caliber projectiles. The present model consists of two parts; the first is based on energy balance principle for modeling the projectile penetration into a thin metallic plate failed by petalling [1], whereas the second uses the circumferential strain as a failure criterion for modeling the projectile penetration into a composite target [2]. The main equations representing analytical model are presented. These equations are arranged and compiled into a computer program. The input data to run the program are easily determined. Representative samples of the obtained results are presented with relevant analyses and discussions. The ballistic measurements of the experimental program are compared with the model predictions; good agreement is generally obtained. In addition, new target configurations are constructed and tested; these targets have the capability for defeating the projectile with the highest impact velocity used.enUniversity of Composite mechanics, body armors, impact dynamics, penetration mechanics, and lightweight targetsArticle