Nguyễn Đình, H., Trần Văn, D., Đỗ Văn, M., Mai Quốc, V., Bùi Xuân Sơn and Đặng Bá, N. 2023. The study of the effects of bullet material hardness on the penetration capability of a 7.62x39 mm armor-piercing ammunition by numerical simulation method. Journal of Military Science and Technology. 86, 86 (Apr. 2023), 137–143. DOI:https://doi.org/10.54939/1859-1043.j.mst.86.2023.137-143.