EXPERIMENTAL TESTING AND NUMERICAL SIMULATION ON FLEXURAL BEHAVIOR OF COMPOSITE GRID PANELS

Abstract

Abstract: The paper aims to prepare a composite grid panel reinforced with glass fibre, including the pure grid panel with no skin, grid-stiffened panel with single skin and sandwich grid panel with double skins. By adopting the molding process, using unsaturated polyester resin as bulk material and glass fibre as reinforcer, the grid panel was manufactured. The flexural behavior of grid panel was investigated through experimental tests and numerical simulations. First of all, under three and four point bending loads, an experimental research was carried out to validate the effectiveness of the panels with different structural enhancement modes for increasing the ultimate bending strength and stiffness. The results showed that the flexural bearing capacity and bending stiffness can be significantly improved by strengthening the pure grid with upper skin, bringing the structure better ductile failure characteristics. Then, the numerical simulation of flexural behavior of the grid panel was conducted. The numerical results showed good agreement with the experimental results. Meanwhile, the effects of skin thickness, rib height, rib thickness and rib spacing on the flexural behavior of grid panel were analyzed.

Key words: composite grid panel, skin, reticular rib, flexural behavior, numerical simulation

CLC Number:

TB332

WU Qi-fan, FANG Hai, GAO Feng, CHEN Ji-ye. EXPERIMENTAL TESTING AND NUMERICAL SIMULATION ON FLEXURAL BEHAVIOR OF COMPOSITE GRID PANELS[J]. Fiber Reinforced Plastics/Composites, 2020, 0(1): 12-20.

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