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| Experimental and Theoretical Studies on the Penetration of Calcareous Sand |
| MIAO Weiwei1, QIU Yanyu1,2,CHENG Yihao1, WEN Zhu2, GUO Lei2, WANG Mingyang1,2 |
1. State Key Laboratory of Disaster Prevention and Mitigation of Explosive and Impact, Army Engineering University of PLA, Nanjing 210007, China;
2. School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China |
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Abstract Here,cone-shaped projectiles with the diameter of 14.5 mm were used to conduct penetration tests of calcareous sand within the impact speed range of 300-1 000 m/s to observe projective abrasion,media crushing and penetration depth.The quasi-fluid penetration theoretical model for rigid projectiles penetrating calcareous sand was built.Its calculation results were compared with test ones.Results showed thatafter projectiles penetrating, their warheads have obvious abrasion scratches; there are white powders formed by crushing the original sand near projectiles’trajectories; penetration depth of projectiles in calcareous sand increases with increase intheir impact speed; the model results agree better with test ones,soit can be used to predict calcareous sand’s penetration depth within the impact speed range of 300-1 000 m/s.Finally, the normalized penetration depth calculation formula was deduced.
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Received: 03 April 2018
Published: 28 August 2019
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