CFRP层合板的二次低速冲击及剩余压缩强度试验研究

doi:10.11896/cldb.21100084

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Abstract Taking carbon fiber reinforced polymer (CFRP) laminates as the research object, the repeated low-velocity impact was carried out at the same position of the CFRP laminates. The dynamic response and residual compressive strength of the CFRP laminates were investigated and compared with the results of one-time impact. Applying the same total impact energy for one-time and repeated impact, the impact testing of CFRP laminates was carried out by drop weight method, and the dynamic response and energy absorption law of one-time and repeated impact were obtained. After the impact damage inside the laminates was detected by ultrasonic C-scanning technology, the residual compressive strength testing of CFRP laminates was carried out. In this work, the effects of one-time impact and repeated impact on the structural dynamic response, energy absorption, induced damage and residual strength of CFRP laminates were systematically studied and compared. The results show that under the same total impact energy of 20 J, 30 J and 40 J, the energy absorbed in repeated impact is 52.50%, 67.56% and 81.41% of that in one-time impact, respectively, and that the damaged area for repeated impact is 60.58%, 64.59% and 80.60% of that in one-time impact, respectively, while the residual compressive strength for one-time impact is correspondingly 76.76%, 78.65% and 92.40% of that in repeated impact, respectively. Moreover, the curves of CAI-impact energy, CAI-absorbed energy and CAI-damaged area have the same turning point at the impact energy of 20 J.

Key words： fiber reinforced composite material repeated low-velocity impact residual compressive strength dynamic response energy absorption

Published: 25 June 2023 Online: 2023-06-20

CLC number:

TB332

Fund:Natural Science Foundation of Guangdong Province (2019A1515011116), Overseas Experts Introduction for Disciplinary Innovation in Universities(111 Project) (D21021), and Municipal Science and Technology Planning Project of Guangzhou (20212200004).

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	WANG Jingdong
	PAN Jingwen
	ZHANG Zhifang
	JIANG Jian
	LI Jianbin

Cite this article:

WANG Jingdong,PAN Jingwen,ZHANG Zhifang, et al. Experimental Investigation on CFRP Laminates Subjected to Repeated Low-velocity Impact and Compression After Impact[J]. Materials Reports, 2023, 37(12): 21100084-8.

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http://www.mater-rep.com/EN/10.11896/cldb.21100084 OR http://www.mater-rep.com/EN/Y2023/V37/I12/21100084

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