Contrastive experiments for buffering capacities of solid and hollow particle materials under impact load

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Journal of Vibration and Shock ›› 2023, Vol. 42 ›› Issue (17) : 275-283.

WANG Haoyu1, ZHAO Tingting1,2, FENG Yuntian1,3, LIANG Shaomin1, WANG Zhihua1

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Abstract

Compared with solid particle materials, hollow particle materials can achieve the purpose of lightening weight and saving material consumption which have the growth potential to become good buffering materials. On the basis of measuring the physical properties of the single hollow and solid particles, the buffering capacity of hollow and solid particle materials are studied by comparing the first peak of impact force and buffering time from physical experimental results. The effects of impact energy, particle bed thickness and particle size on buffering capacity of hollow and solid particle materials are investigated. The experimental results show that the elastic modulus and rebound coefficient of single hollow particle are smaller than that of solid particle. Under the low impact energy, the buffering efficiency of hollow particle materials are better than that of solid particle materials. When the impact energy is large, the advantage of hollow particle buffer capacity is mainly reflected in the weakening ability of peak impact force. The critical thickness of hollow particle materials is smaller than that of solid particle materials, but the buffering efficiency of hollow particle materials is worse than that of solid particle when the thickness of the particle bed is small. The influence of particle size on buffering capacity of hollow and solid particle materials presents opposite trends. The vibration energy dissipation is the main factor affecting the buffering capacity of hollow particle materials. The optimal buffering capacity of hollow particle materials can be achieved when the ratio of inner and outer diameters of hollow particles equals to a certain number. Therefore, when the particle size exceeds the equilibrium particle size, hollow particle materials no longer show better buffering capacity compared with solid materials.

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particle materials / hollow particles / buffering capacity / impact load

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WANG Haoyu1, ZHAO Tingting1,2, FENG Yuntian1,3, LIANG Shaomin1, WANG Zhihua1. Contrastive experiments for buffering capacities of solid and hollow particle materials under impact load[J]. Journal of Vibration and Shock, 2023, 42(17): 275-283

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