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Articles by A.B. Abdullah
Total Records ( 6 ) for A.B. Abdullah
  A.B. Abdullah , L.Y. Chia and Z. Samad
  In this study, a sensitivity analysis method was used to identify the optimal machining conditions with respect to surface quality. Presently, programming Turbo C++ is used to evaluate the properties of machined surfaces with cutting parameters using arbitrary sets of experimental values. Based on the proposed equations and its differentiated function, the quality of surface roughness can be known clearly through the sensitivities of proper local deviations. This method shows the sensitivity of each surface roughness to the machining parameters. The variables investigated were cutting speed (Vc), depth of cut (d), feed rate (fr) and the surface roughness (Ra). The result indicates that machining parameter that had the highest influence on surface roughness is the feed rate followed by the cutting speed and the depth of cut. Finally experiment analysis was carried out to verify the analytical results.
  A.B. Abdullah , L.Y. Chia and Z. Samad
  A.B. Abdullah , M.H. Hasim , M.S. Yusoff , K.A. Wahab and Z.M. Ripin
  This study discussed the relationship between design for assembly and maintainability in order to remain product/system performance and at the same time to extend their life. The maintenance efficiency is measure based on maintainability index, which is derived based on several assembly criteria such as disassembly, assembly direction and tools used. To increase the maintainability, redesign of the potential components based on design for assembly guideline have been made. A case study of drum brake is carried out to clarify the work.
  A.B. Abdullah , K.S. Ling , Z. Samad and S. Sahudin
  An approach to optimal design of cold forging die is presented in this paper. The closed forging of the Universal joint was generated using three-dimensional CAD modeling software namely Solid works and analysis of stress and fatigue life were carried out. This study focused on the effects of corner radius of the die and part orientations to fatigue life of the die. The forging load is obtained by using Simplified Slab Method. The result indicate that corner radius and part orientation gives significant effect to reduction of stress on the die, thus increase the service life of the die.
  A.B. Abdullah , M.J. Embi , A.M.S. Hamouda and S. Shuib
  Cold forging process can be described as the process where a metal is plastically deformed at room temperature with application of huge pressure. The process not only changes the shape but also improves the properties of the forged parts due to grain size refinement. Currently the Computer Aided Engineering (CAE) tools are widely used as a replacement of the empirical trial and error method. The objective of this research is to model the cold forging process using finite element analysis. The study will investigate the stress distribution, load-displacement curve and effect of die geometry and lubrication to the die performance. Due to geometrical considerations and computational limitations, the study only involve of two-dimensional (2D) simplified model of cold forging process using ABAQUS software.
  A.B. Abdullah and Z. Samad
  Die design in the forging process become crucial as the production cost and accuracy of the forged part being tighten. The study present a review of the current advanced of die design used in forging process and the system associated with in order to enhance the design process and performance of the die. At the end of this study future challenges of the die design area and the approach taken to develop a support system that can fulfilled the customer demand is also outlined.
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