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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.

The paper presents the results of finite element study conducted by developing a three dimensional model of single cylinder engine piston assembly. A new method to estimate the piston assembly friction by finite element approach on the bases of IMEP (Indicated Mean Effective Pressure) without using any instrumentation and engine modification has been discussed. The basic CAD model of the engine cylinder required to build finite element model was developed using Ug-Nx-3 software. The finite element model of the single cylinder engine cylinder piston assembly was generated by using HYPERMESH 7 preprocessing software. The respective boundary conditions, loads, material properties, contact pairs were defined to mimic the real working conditions of the engine. In order to impose the effect of lubrication one dimensional Reynolds equation was solved to find hydrodynamic pressure acting on the piston skirt. The final model is solved by L.S.Dyna solver.

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.

The paper presents results of the three dimensional finite element study conducted to estimate the blowby from multi-cylinder diesel engine using finite element approach. The CAD model of the engine is modeled using UG-Nx-3 modeling software, and the required finite element mesh is obtained by using HYPERMESH preprocessor. The model is made to mimic the working conditions in the engine by applying appropriate boundary conditions. The effect of hydrodynamic lubrication at piston skirt is imposed by solving Reynolds equation to use in F.E.Model. The complete model is simulated by using L.S.Dyna software. The results of simulation are used to estimate the blowby losses from the engine. It is found that the major flow of gasses take place through the end gap of the rings. The blowby results obtained from the model are having good correlation with the experimentally measured values.

The paper presents results of the multibody non linear dynamic analysis of the internal combustion engine to study the motions of the piston assembly components like piston, piston rings etc. The complete three dimensional CAD model of the multicylinder engine is developed using UG-Nx-3 modeling software and the finite element model along with the required boundary conditions to mimic the working conditions of the engine is obtained using HYERMESH preprocessor. The effect of hydrodynamic lubrication is imposed by solving Reynolds equation. The complete model is simulated using L.S.Dyna software and the results of simulation are used to study the dynamic phenomenon of the piston assembly components. The dynamic motions of the top, second, oil rings are demonstrated and it is found that there exists a difference in ring motions in different cylinders of the same engine.