极端不利环境下氧化铝薄壁空心球粒抗冲击吸波性能试验研究

doi:10.11896/cldb.23080113

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Abstract It is an important part of protective engineering to give full play to the wave-absorbing efficiency of the wave-absorbing layer. However, dry loose sand, a traditional wave-absorbing material used in the layered protective structure, cannot effectively exert wave-absorbing efficiency under the two extremely unfavorable conditions of saturated water and freezing. Improving the wave-absorbing reliability of the wave-absorbing layer in the extremely unfavorable environment is of great significance for the survivability of the protective structure in wartime. The wave-absor-bing efficiency of alumina thin-walled hollow particles under impact load was tested by split Hopkinson bar and compared with that of standard sand. The test results show that the alumina thin-walled hollow particles have obvious advantages over the traditional wave-absorbing materials both in the condition of saturated water and in the condition of freezing. Alumina thin-walled hollow particles can reflect more incident energy, thereby reducing the energy coupled into the material. At the same time, for the energy coupled into the material, its dissipation capacity is also stronger than that of standard sand. The efficient wave-absorbing ability of alumina thin-walled hollow particles under saturated water and freezing conditions is mainly due to the broken of a large amount of hollow particles under impact load, which releases the internal gas phase of the shell and increases the compressibility of the medium. Compared with dry loose sand, the dynamic stress-strain curve of the alumina thin-walled hollow particles is smoother, and its compression modulus and the peak stress are smaller, but its peak strain is greater. The large size of alumina thin-walled hollow particles can further improve the wave-absorbing efficiency of the material under extremely unfavorable conditions, and improve the efficiency and cost ratio in engineering applications. The work provides a low-cost and high-reliability solution to solve the problem of water damage and freezing damage in protection engineering.

Key words： alumina thin-walled hollow particles energy analysis particle breaking dynamic stress-strain curve

Published: 10 December 2024 Online: 2024-12-10

CLC number:

O382.1

Fund:National Natural Science Foundation of China (51979280).

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	Articles by authors
	YAN Pengzhi
	FAN Pengxian
	WANG Yu
	XING Wenzheng

Cite this article:

YAN Pengzhi,FAN Pengxian,WANG Yu, et al. The Anti-impact Wave-absorbing Performance of Alumina Thin-walled Hollow Particles Under Extremely Adverse Environment[J]. Materials Reports, 2024, 38(23): 23080113-6.

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http://www.mater-rep.com/EN/10.11896/cldb.23080113 OR http://www.mater-rep.com/EN/Y2024/V38/I23/23080113

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