Study on the Axial Quasi-Static Compression Properties of Molded Regular Hexagonal Glass Fiber Tube

Abstract

Five kinds of regular hexagonal glass fiber single tubes with wall thickness were fabricated by molding pressing method. The quasi-static compression test was performed on the glass fiber tubes using a universal testing machine. Then, the failure mode in the compression process was analyzed and the influence of the cell wall thickness on the energy absorption performance of the glass fiber composite thin-walled tube was explored. The results show that the single glass fiber tube appears to fold inward or outward and the fiber at the corner of the hexagonal was torn during the quasi-static compression process. With the increase of the wall thickness, the glass fiber tube appears to be layered, in the compression process, the direction of crack propagation is along the fiber direction (0 °/90 °), the PCF, MCF and SEA all increase with the increase of cell wall thickness, and the value increases sharply when the cell wall thickness increases from 0.8 mm to 1.0 mm, the minimum specific energy absorption is 9.72(j/g), the maximum specific absorption energy is 35.73(j/g), and the crack fracture zone has significant effect on the specific absorption energy.