EXPERIMENTAL STUDY ON SHEAR BEHAVIOR OF REINFORCED FOAM CORE COMPOSITE SANDWICH STRUCTURES

Abstract

Abstract: Reinforcement is necessary for the foam core composite sandwich structure because of the poor shear performance of the foam core. This paper presented several kinds of reinforced composite structures including their difference in design principles, their contributions to the interfacial property and shear behavior as well as their limitations. What′s more, three point bending tests were conducted on the diaphragm reinforced foam core sandwich beams made through vacuum infusion process, in order to study the impact of the reinforced measure and the diaphragm span on the shear behavior. The experimental results showed that the existence of diaphragms may enhance beams′ ductility, and the shorter the diaphragm span, the more enhancement in ductility, hence, the brittleness of foam core sandwich structure were greatly improved. However, there was little increase in strength and rigidity, which is similar to the experimental result of 90° stitch addition in sandwich structure. The diaphragm reinforced structure is simple made and well designed, and the change from diaphragm to inclined or biaxial diaphragm reinforced foam core composite structure may not only enhance its strength and rigidity, but also remain its advantage in ductility.

Key words: composite sandwich beam, shear behavior, diaphragm reinforced foam core, ductility

CLC Number:

TB332

WANG Hui, QI Yu-jun, LIU Wei-qing. EXPERIMENTAL STUDY ON SHEAR BEHAVIOR OF REINFORCED FOAM CORE COMPOSITE SANDWICH STRUCTURES[J]. COMPOSITES SCIENCE AND ENGINEERING, 2014, 0(12): 91-96.

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