THE INFLUENCE OF END INDUCED HOLES ON AXIAL COMPRESSIONPERFORMANCE OF Al-CFRP COMPOSITE THIN-WALLED TUBE

Abstract

Abstract: In order to study the axial compression performance and fracture mode of Al-CFRP tubes with different end induced holes, this paper based on initial peak value, total energy absorption and crushing efficiency, the quasi-static axial compression tests were carried out for aluminum-carbon fiber composite tubes (Al-CFRP tubes) with different end induced holes, and the contrast tests for aluminum tubes (Al tubes) and carbon fiber reinforced resin matrix plastic tubes (CFRP tubes) were also carried out, and comprehensive evaluation of axial compression performance of thin-walled tube by using the evaluation index W of the weighted combination form combining crushing efficiency and total energy absorption. The results show that the Al-CFRP tubes have a more stable failure mode; compared with pure Al tubes and pure CFRP tubes with no improvement in axial compression performance, the end induced holes improve the crushing efficiency of Al-CFRP tubes, and the total energy absorption decreases first and then increases with the increase of the number of holes, among which the four holes have the most obvious effect on the axial compression performance of the Al-CFRP tubes; compared with the Al-CFRP tubes without holes, its total energy absorption and crushing efficiency are increased by 4.2% and 28.3%, respectively, and its weighted evaluation index W_AC4 is 1.16, which is also significantly higher than the reference value.

Key words: carbon fiber composite, composite thin-walled tube, axial compression, end induced holes, energy absorption characteristic

CLC Number:

TB332

WANG Kai, MA Qi-hua, ZHA Yi-bin. THE INFLUENCE OF END INDUCED HOLES ON AXIAL COMPRESSION
PERFORMANCE OF Al-CFRP COMPOSITE THIN-WALLED TUBE[J]. COMPOSITES SCIENCE AND ENGINEERING, 2021, 0(2): 65-71.

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THE INFLUENCE OF END INDUCED HOLES ON AXIAL COMPRESSION
PERFORMANCE OF Al-CFRP COMPOSITE THIN-WALLED TUBE

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