PSI - Issue 71

Deepu Kumar Singh et al. / Procedia Structural Integrity 71 (2025) 164–171

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Fig. 6- Back face signature of 5 mm thickness sheet against the 150 m/s impact velocity. 4. Conclusion

In this study, the ballistic performance of natural rubber sheets was studied against the conical nose projectiles using finite elements simulations, and compare these results with the existing material damage model based on the literature (Sangamesh et al., 2018). The comparison of damage models was based on residual projectile velocity, energy absorption capacity, and ballistic limit. The conclusions drawn from the study are presented below. ● The two material parameters-based Mooney-Rivlin material model correctly predicted the nonlinear deformation behaviour of rubber sheets under ballistic impact. ● The numerical results of the Mooney-Rivlin damage model show a good correlation with the Neo-Hookean damage model based on the literature. ● The error percentage difference between the Neo-Hookean material model and the Mooney-Rivlin model lies under 3%. ● The obtained results from the Mooney-Rivlin damage model in terms of residual velocity, energy absorption, and ballistic limit are obtained from the fixed set of material parameters. References Andraskar, N., Tiwari, G., Goel, M.D., 2024. Ballistic Impact Simulation of Alumina Using Smoothed Particle Hydrodynamics (SPH) Method, in: Velmurugan, R., Balaganesan, G., Kakur, N., Kanny, K. (Eds.), Dynamic Behavior of Soft and Hard Materials Volume 1, Springer Proceedings in Materials. Springer Nature Singapore, Singapore, pp. 123 – 132. Bergström, J.S., Boyce, M.C., 1999. Mechanical Behavior of Particle Filled Elastomers. Rubber Chem. Technol. 72, 633 – 656. Bikakis, G.S.E., Dimou, C.D., Sideridis, E.P., 2017. Ballistic impact response of fiber – metal laminates and monolithic metal plates consisting of different aluminum alloys. Aerosp. Sci. Technol. 69, 201 – 208. Destrade, M., Saccomandi, G., Sgura, I., 2017. Methodical fitting for mathematical models of rubber-like materials. Proc. R. Soc. Math. Phys. Eng. Sci. 473, 20160811. Fu, B., Yang, X.X., Wang, L., 2017. An Amended 8-Chain Model for Rubber-Like Materials. Key Eng. Mater. 744, 288 – 294. Hamm, C., Smetacek, V., 2007. Armor: Why, When, and How, in: Evolution of Primary Producers in the Sea. Elsevier, 311 – 332.