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The behavior of composite material is a result of integrated contribution of fiber, matrix, and fiber/matrix interface. Applied load to members must effectively get transferred from matrix to fibers via interface. It is extremely important to study and understand the nature of the interface of any given composite system. The flexural behavior of wood filled steel tubes is largely dependent on interactions at wood/steel interface. The objective of this paper is to present the work carried out to study the behavior and determine the interfacial shear stress in wood filled steel tubes. Interfacial shear stress is studied considering simple mechanical bonding by interference fit and adhesive bonding by structural epoxy adhesive. The experimental results obtained indicate that the interfacial shearing strength is higher in the case of adhesively bonded wood/steel interface.

The combination of wood and steel together gives better properties than individual materials used alone. The advantage associated with this type of hybridization is composite systems are better than that of non-composite system of same size because the system is stiffer. The purpose of utilization of steel with timber members is mainly for stiffness and strength. Steel adds ductility to composite system. The paper presents the experimental results of the work carried out to study the behavior of specimens prepared in solid teakwood, hollow sectioned steel tube and teakwood filled hollow sectioned steel tube under compression. The circular, rectangular and squared sections were used for study. The interfacial bond between wood and steel is obtained by interference fit and by suitable adhesive for wood-steel composite system.

Wood structures have played an important role in construction. The strengthening of wooden beams using composite materials is designed to enhance both capacity and as well as flexural stiffness. Composite wood-steel structural members have potential to combine the advantages of ready availability, easy working, and simple joining along with strength and stiffness. The paper presents the results of the work carried out to study and analyze flexural strength properties of rectangular teak wood beam (RTWB), rectangular hollow sectioned thin walled steel tube (RHSTWST), and rectangular teak wood filled in rectangular hollow sectioned thin walled steel tube. A wood filled steel tube (WFT) is developed for the purpose of investigation of flexural properties. Desired flexural properties of teak wood, carbon steel have been obtained experimentally and compared with already researched and presented data.