http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Zhou Yi,Zhao Chao,Zhong Xingu,Wang Langke,Luo Tianye 한국강구조학회 2024 International Journal of Steel Structures Vol.24 No.1
A fi lled thin-walled tube is an excellent energy absorption device, and its performance is closely related to the fi lled core material. In this paper, a porous metal-high performance concrete interpenetrating phase composites (PMCIPC) fi lling core material is proposed, which takes porous nickel as the matrix and high-performance concrete as the reinforcing element, trying to improve the energy absorption of thin-walled tube. Axial quasi-static compression tests were carried out on empty tube, PMCIPC and fi lled tube. Based on the experimental results, the eff ects of wall thickness and aspect ratio on the deformation and energy absorption performance of the fi lled tube were studied by numerical simulation. The results show that the larger wall thickness increases the energy absorption of the empty tube and the fi lled tube. The PMCIPC fi lling further improves the energy absorption capacity, and for the empty tubes with smaller wall thickness, the PMCIPC signifi cantly increases the crushing force effi ciency. When the aspect ratio (L/D) is 3.7, the deformation mode of the fi lled tube is Euler instability, and the performance begins to decrease sharply. Finally, a theoretical model is established to predict the mean crushing force of the fi lled tubes. The model results are in good agreement with the experimental results. This study provides eff ective guidance for the design of thin-walled structures with high energy absorption effi ciency.