PSI - Issue 13

Israr ul Haq et al. / Procedia Structural Integrity 13 (2018) 1955–1960 Israr ul Haq / Structural Integrity Procedia 00 (2018) 000–000

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4. Conclusions In this paper, numerical simulation of spherical projectile is compared with experimental and four conical nose shaped projectiles impact behavior on Inconel-718. This research can be abridged in such a way that the results from numerical analysis were when compared with experiment for spherical projectile impact on Inconel-718, it demonstrates accurate prediction of deformation mode, which proved the authenticity of the finite element model. This exploration also revealed that the apex angle of conical projectile has significant effect on deformation mode and ballistic limit of the target, thus, increase in apex angle increased radial crack length in the target. In case of apex angle, along with the radial cracks formation of petals, there is crack propagation in the circumferential direction as well as at the base of the petals. Also, increase in apex angle of the conical nose projectile increased bending of the target plate and decreased in curling of the petals. Finally, it has been noticed through numerical study that the Inconel-718 offered maximum resistance for conical projectile amongst other projectiles considered in this research, due to its lowest tendency to penetrate the target. References Erice, B., Pérez-Martín, M. J., & Gálvez, F. (2014). An experimental and numerical study of ductile failure under quasi-static and impact loadings of Inconel 718 nickel-base superalloy. International Journal of Impact Engineering, 69 , 11-24. Iqbal, M., Diwakar, A., Rajput, A., & Gupta, N. (2012). Influence of projectile shape and incidence angle on the ballistic limit and failure mechanism of thick steel plates. Theoretical and Applied Fracture Mechanics, 62 , 40-53. Johnson, G. R. (1983). A constitutive model and data for metals subjected to large strains, high strain rates and high temperatures. Paper presented at the Proceedings of the 7th International Symposium on Ballistics, The Hague, Netherlands, 1983. Johnson, G. R., & Cook, W. H. (1985). Fracture characteristics of three metals subjected to various strains, strain rates, temperatures and pressures. Engineering fracture mechanics, 21 (1), 31-48. Kpenyigba, K., Jankowiak, T., Rusinek, A., & Pesci, R. (2013). Influence of projectile shape on dynamic behavior of steel sheet subjected to impact and perforation. Thin-Walled Structures, 65 , 93-104. Ren, X., Zhan, Q., Yuan, S., Zhou, J., Wang, Y., Ren, N., . . . Yang, H. (2014). A finite element analysis of thermal relaxation of residual stress in laser shock processing Ni-based alloy GH4169. Materials & Design (1980-2015), 54 , 708-711. Rodríguez-Martínez, J. A., Rusinek, A., Pesci, R., & Zaera, R. (2013). Experimental and numerical analysis of the martensitic transformation in AISI 304 steel sheets subjected to perforation by conical and hemispherical projectiles. International Journal of Solids and Structures, 50 (2), 339-351. Rodríguez-Millán, M., Vaz-Romero, A., Rusinek, A., Rodríguez-Martínez, J., & Arias, A. (2014). Experimental study on the perforation process of 5754-H111 and 6082-T6 aluminium plates subjected to normal impact by conical, hemispherical and blunt projectiles. Experimental Mechanics, 54 (5), 729-742. Sjöberg, T., Sundin, K.-G., & Oldenburg, M. (2013). Calibration and validation of plastic high strain rate models for alloy 718. Paper presented at the XII-International Conference onComputational Plasticity. Fundamentals and Applications-COMPLAS. Vijayan, V., Hegde, S., & Gupta, N. (2017). Deformation and ballistic performance of conical aluminum projectiles impacting thin aluminum targets: Influence of apex angle. International Journal of Impact Engineering, 110 , 39-46.