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| Tests and numerical analysis for effects of polyurea coating on anti-knock performance of armor steel plate |
| HE Jiahao1, WU Mengyang1, LI Gaowei1, SHI Wen2, SUN Xiaowang1, WANG Xianhui1 |
1. College of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China;
2. Inner Mongolia 1st Machinery Group Co., Ltd., Baotou 014030, China |
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Abstract In order to study the influence of polyurea coating spraying position and coating thickness on the explosion resistance of steel plate, 2 kg TNT explosive explosion tests were carried out on four different types of spraying structures and pure steel plate structures, and the test conditions were numerically simulated by LS-DYNA simulation software. The reliability of numerical calculation was verified by comparing the test results. At the same time, the stress wave attenuation characteristics in the front and back spraying structures were calculated and analyzed theoretically. On this basis, the influence of coating thickness on the explosion resistance of back sprayed structure is further studied. The results show that compared with the non-spraying, face-to-face and double-sided spraying structures, the back spraying shows more significant explosion resistance potential, and the large impedance ratio structure formed by it is an important reason for the effective attenuation of the peak value of stress wave; Under the condition of equal steel plate thickness, increasing the coating thickness can effectively improve the structural resistance, but the degree of improvement decreases with the increase of polyurea / steel plate thickness ratio; Under the condition of equal surface density, increasing the thickness of the coating will aggravate the damage of the structure.
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Received: 08 June 2022
Published: 15 July 2023
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