期刊
INTERNATIONAL JOURNAL OF CRASHWORTHINESS
卷 27, 期 6, 页码 1622-1634出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/13588265.2021.1981125
关键词
Energy absorption; axial crushing; impact loading; high strain rate; square thin-walled tube
The study found that an increase in tube length did not affect the maximum force in square thin-wall tubes under high strain rates, while an increase in hole diameter led to a decrease in the maximum force. Additionally, compared to tubes without holes, the presence of holes in square thin-wall tubes reduced the collapse force efficiency.
This paper presents an experimental investigation about the effect of the hole on the crushing force of thin tubes with the square cross-section under axial impact with a high strain rate. To this end, 24 absorbers were studied and their crushing properties were extracted and compared with a simple absorber. The effect of different parameters, including hole diameter, sample length, sample cross-section size, and impact speed were also evaluated. It was found that in hole square thin-wall tubes with high strain rates, an increase in tube length did not affect the maximum force. The results showed that considering cylindrical tubes, average and maximum force in square thinwall tubes without a hole are less than those with holes; this difference in force was not significant but collapse force efficiency (CFE) decreased to 46%. Moreover, by the increase of hole diameter, the maximum force to square thin wall decreased.
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