PSI - Issue 52

Huadong Xu et al. / Procedia Structural Integrity 52 (2024) 52–62 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

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Residual velocity of projectiles Maximum depth of impact crater Total of impact crater volume R Residual mass percentage of targets S Specific absorbed energy Remaining kinetic energy of projectile p Projectile mass tp Mass of the total penetrated fabric layers t Area of the impact plane 2. Materials and experimental methods

HVI experiment on fabrics was conducted by the two-stage light gas gun, in which spherical aluminum projectiles impacted multiple fabrics targets at velocities 4.0~4.2 km/s. A total of 8 HVI experiments were performed on 6 kinds of fabrics, Al mesh, and Al plate specimens. Types and properties of materials used in experiments are described in Section 2.1. The shielding configuration and HVI experimental setup are outlined in Section 2.2 and Section 2.3, respectively. 2.1. Materials High performance fabrics were chosen as target material, including inorganic and polymeric fabrics, like Ceramic (Nextel), Basalt, Quartz, Aramid, UHMWPE, and Carbon fiber fabrics. The Al mesh has a rhombus mesh structure which is formed by weaving. The hole size is 1 mm × 2 mm and the material are 2017 Al alloys. The 5A06 Al alloys is selected for comparison of shielding performance, for this material is commonly used to manufacture spacecraft bulkhead. Table 1 shows material properties of the Al 2017, Al 5A06, and fibers used to weave the fabrics. The material property values are obtained from material performance test or data sheets provided by the manufacturer.

Table 1. Mechanical properties of materials used for experimental. Material (g/cm³) (MPa) E (GPa) (%) ( ℃ ) 1 (g/m 2 ) (g/m 2 ) UHMWPE 0.96 2470 99 3.7 120 302.8 35 10598.0 Aramid 1.44 3590 122 3.2 450 193.3 56 10824.8 Quartz fiber 2.20 1036 66 2.6 1700 82.715 132 10918.4 Basalt fiber 2.65 3800 93-110 3.1 1050 339.8 32 10873.6 Nextel fiber 2.80 1840 190 2.9 1800 627.65 17 10670.1 Al 2017 2.78 405 72 — 660 225.6 48 10828.7 Carbon fiber 1.77 4100 240 1.7 2000 197.85 56 11079.6 Al 5A06 2.64 314 70 — 660 2727.0 4 10908.0

2.2. Shielding configuration

Fig. 1 is the schematic diagram of shielding structure.