Shen Chao, Pi Ai-guo, Liu Liu, Liu Jian-cheng, Huang Feng-lei. Discarding the sabot of a high-velocity projectile by a laminated wood target[J]. Explosion And Shock Waves, 2015, 35(5): 711-716. doi: 10.11883/1001-1455(2015)05-0711-06
Citation:
Shen Chao, Pi Ai-guo, Liu Liu, Liu Jian-cheng, Huang Feng-lei. Discarding the sabot of a high-velocity projectile by a laminated wood target[J]. Explosion And Shock Waves, 2015, 35(5): 711-716. doi: 10.11883/1001-1455(2015)05-0711-06
Shen Chao, Pi Ai-guo, Liu Liu, Liu Jian-cheng, Huang Feng-lei. Discarding the sabot of a high-velocity projectile by a laminated wood target[J]. Explosion And Shock Waves, 2015, 35(5): 711-716. doi: 10.11883/1001-1455(2015)05-0711-06
Citation:
Shen Chao, Pi Ai-guo, Liu Liu, Liu Jian-cheng, Huang Feng-lei. Discarding the sabot of a high-velocity projectile by a laminated wood target[J]. Explosion And Shock Waves, 2015, 35(5): 711-716. doi: 10.11883/1001-1455(2015)05-0711-06
Experiments and numerical simulations were carried out to explore a mechanical method for discarding the sabot of a high-velocity projectile by a laminated wood target. First, the feasibility and parametric regular pattern of an orthotropic material model for wood in numerical simulation were discussed. And the numerical simulation program was verified and validated by combining with the hyper-speed penetration experimental data of U.S. Army. Then, the penetration/perforation phenomena were analyzed for a sabot-contained projectile impacting a laminated wood target under different conditions. The numerically simulated and experimental results show the followings. Under normal impact, the sabot of a sub-caliber projectile can be discarded effectively by a reasonably-designed laminated wood target, the projectile can penetrate vertically into the target and its velocity attenuation can be controllable. Under oblique impact, a laminated wood target can induce the attack angel of the projectile to increase. With the increasing of impact velocity, the consumption of a projectile's kinetic energy increases, which indicates that wood has an apparent strain-rate strengthening effect.
Beltrame R, Mattos B D, Gatto D A, et al. Impact strength of nogueira-pecãwood on different moisture conditions[J]. Ciência Rural, 2012, 42(9): 1583-1587. doi: 10.1590/S0103-84782012005000060
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Murray Y D. Manual for LS-DYNA wood material model 143[R]. FHWA-HRT-04-097, 2007.
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Forrestal M J, Altman B S, Cargile J D, et al. An empirical equation for penetration depth of ogive-nose projectiles into concrete targets[J]. International Journal of Impact Engineering, 1994, 15(4): 395-405. doi: 10.1016/0734-743X(94)80024-4
Figure 1. Strain-rate strengthening effect of wood obtained by experiment and theoretical model[4]
Figure 2. Stress-strain relationships obtained by numerical simulation for the wood with the water mass fraction of 30%
Figure 3. Experimental velocity and deceleration histories compared with ones by numerical simulation
Figure 4. The kinetic energy loss of the projectiles with different impact velocities penetrating into the laminated wood targets with the same thickness
Figure 5. Deceleration history curves at different impact velocities
Figure 6. Relationship between coefficient R and target strength
Figure 7. Photos for high-velocity projectiles penetrating into laminated pine targets
Figure 8. Deceleration varied with time
Figure 9. Velocity varied with time
Figure 10. Variation of the angle between the axis of the projectile and the normal of the target with time
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