Numerical simulation for influences of fragment impact positions on-anti-penetration performance of UHMWPE plate
FANG Zhiwei1,2, HOU Hailiang1， LI Dian1， ZHU Xi1， HU Nianming1
1.College of Naval Architecture and Ocean Engineering, Naval University of Engineering,-Wuhan 430033, China；
2.Unit 91189 of PLA, Lianyungang 222041, China
Abstract：UHMWPE plate has excellent anti-penetration performance and usually needs to be cut into a certain size and then spliced and installed again in actual application.When high-speed fragments produced by implosion of semi-armor-piercing missiles penetrate UHMWPE plates in cabin of warship, their impact positions are random.Here, numerical simulation was used to study effects of fragment impact positions, fragment velocity and fragment length-diameter ratio on the anti-penetration performance of spliced UHMWPE plates.Result showed that when fragments start to impact a UHMWPE plate, fiber shear failure appears on the plate under combined action of bending moment and shear stress; when fragments continue to penetrate the plate, fiber tensile fracture failure occurs with a serious delamination phenomenon on the plate; when fragments penetrate two spliced plates with lower impact velocity (less than 1 000 m/s), the two spliced UHMWPE plates have an obvious anti-missile weak area, and the area is about three times of fragment radius; when fragments penetrate four spliced UHMWPE plates, the target plates can be divided into weak, sub-weak and normal areas; when UHMWPE plates are spliced and installed, considering sizes of fragments produced by implosion of semi-armor-piercing missiles and the convenience of installation processing, a 10 cm range on both sides of the splicing joint should be strengthened as an anti-missile weak area.
方志威1,2,侯海量1，李典1，朱锡1，胡年明1. 破片着靶点位置对拼接的UHMWPE板抗侵彻性能影响数值研究[J]. 振动与冲击, 2018, 37(21): 22-28.
FANG Zhiwei1,2, HOU Hailiang1， LI Dian1， ZHU Xi1， HU Nianming1. Numerical simulation for influences of fragment impact positions on-anti-penetration performance of UHMWPE plate. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(21): 22-28.
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