International Journal of Mechanical Engineering

1-8

Authors: Chirag P.Patel, Tejas V. Sharma & M. G. Bhatt

Dry EDM is a modification of oil EDM Machining medium. The main aim is to study the effect of Percentage Pulse on time, Spindle speed, air pressure on response such as Material Removal rate (MRR), Tool Wear Rate (TWR) and Surface Roughness (Ra).Influence of Silicon Carbide Particles, Gas Pressure, Sp Finding the optimum conditions of machining parameters using Genetic Algorithm (GA) and Artificial Neural Network (ANN) called as Hybrid Modelling.

19-26

Authors: Ali Salh Sawadi

Design of aircraft take in consideration Many factors like safety, efficiency, reliability, and comfort. However, the importance all of these aspects depend on the type of the aircraft where the designed can vary from fighter to commercial airplanes. As a result, the design of aircraft has to meet with requirements that effect on the materials used in its construction and complexity of its structure. Many from materials can be used in the design of the aircraft to get good properties such as, elasticity, strength, weight, specific, and corrosion resistance. Also can be used Different materials in the design the parts of the aircraft, as a function of the initial requirements of the strength -to -weight ratio and the preferential directions of the applied loads. In this paper, the aircraft wing is modeled by 3D modeling software Pro/Engineer. The material that which used for aircraft wings is mostly metallic alloys. In this paper, the materials change by composite materials Carbon Fiber and Aramid Fiber. Static analysis done to determine the stresses and strain and deformation produced by applying loads. Analysis done in Ansys.

39 - 50

Authors: THANH BINH CAO & SLAWOMIR KEDZIORA

The use of direct laser sintering (DLS) has become more attractive recently since it offers a promising tool in fabricating complex components rapidly. Particularly, the technique is seen more powerful when it is combined with computer-aid design and computational optimization. In spite of knowledge increment in the above areas presently, design method for sophisticated structures towards DLS is still far from being fully exploited. Therefore, this paper was issued to investigate a novel methodology of design, developed by combining topology optimization and lattice-beam implementation, for a blend-solid-lattice frame of a motorcycle. From the obtained results, it was recognized that the as-built tubular hybrid structure demonstrated comparable values of first resonant frequency and mass with respected to those of the original. Additionally, it was found that stiffness of the generated structures depended strongly on locations where lattice was substituted. In particular, less stressed frame’s components were evidenced as appropriate regions for the substitution. The achieved results also revealed estimated buckling load factors, being circa 18 times higher than applied bumping loads acted on the tubular-lattice structure. Finally, equivalent stress predicted in static analyses confirmed all designs working safely in nominated conditions. Based on these achievements, it is believed that the new method worked quite acceptably in designing direct-laser-sintered motorcycle frame, and it is very promising to further develop the method as well as extend it into different complex direct-laser-sintered elements designed for future applications.