VORTEX GENERATOR EFFECT ON MITTIGATION OF SEPARATION IN TRANSNIC FLOW NOZZLE
Published In: 2ND INTERNATIONAL CONFERENCE ON ADVANCES IN MECHANICAL, AERONAUTICAL AND PRODUCTION TECHNIQUES
Author(s): ALTAB HOSSAIN , AZUDDIN BIN MAMAT , IMTIAZ AHMED CHOUDHURY , NURUN NAHAR
Abstract: Preparation of quality feedstock is critically important for production of quality product through metal injection molding (MIM). This study deals with the optimization of mixing parameters to ensure the homogeneity in feedstock of aluminum powder and high density polyethylene based binder. Experimental design and feedstock preparation was carried out considering three parameters such as powder concentration, mixing temperature and mixing speed. Feedstock rheological characteristic ‘viscosity’ was analyzed through alpha analytical rheometer. The Taguchi analysis was performed for this ‘viscosity’ to find the combination of optimum level of parameters. The results show that 58:42 powder-binder ratio, 120 0C mixing temperature and 43 rpm mixing speed give satisfactory quality of feedstock i.e. minimum feedstock viscosity. A well fit of the optimized parameters was observed through analysis of variance (ANOVA) with higher accuracy using a confidence level of 95%.
- Publication Date: 21-Dec-2014
- DOI: 10.15224/978-1-63248-037-8-95
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TOPOLOGY OPTIMIZATION USING INTEGRATED MULTI-POINT APPROXIMATION WITH APPLICATION
Published In: 2ND INTERNATIONAL CONFERENCE ON ADVANCES IN MECHANICAL, AERONAUTICAL AND PRODUCTION TECHNIQUES
Author(s): ABDURAHMAN M. HASSEN , HAI HUANG
Abstract: Multi-point approximation (MA) [1] and GA together with two-level multipoint approximation concepts was used. The topology variables of the trusses are optimized, through GA in the external layer of the first level approximation, while the cross-sectional areas of bars are optimized in the internal layer, which is solved by the dual method in the second level approximation. But singularity of MA may take place. The Integrated Multi-point Approximation (IMA) developed by using two approximate functions in two different specified domains, to avoid the singularity, the developed function can be used for both topology and sizing. Its accuracy of the new function studied [2],[3], results were satisfying, for topology optimization and sizing; in this study application examples are demonstrated, to show the validity and the efficiency of the proposal, for topology optimization as well as sizing
- Publication Date: 21-Dec-2014
- DOI: 10.15224/978-1-63248-037-8-99
- Views: 0
- Downloads: 0