Khairi Yusuf | Universitas Andalas (original) (raw)
Papers by Khairi Yusuf
Abstract:- This paper intends to present the conceptual design of very light jet (VLJ) aircraft i... more Abstract:- This paper intends to present the conceptual design of very light jet (VLJ) aircraft in the university level. The design process that covers by this paper is just from conceptual approach. Current technical information of the business jet in the market will be studied for competitor analysis purpose. After that, the calculation process will take part, like initial sizing, performance sizing, initial sizing of main component, weight breakdown, cg (centre of gravity) position and aircraft performance. This paper will only concentrate on conceptual design, the next stage of design can be continuing in future with the data from this paper. Key-Words:- conceptual design, wing design, aircraft design, aerodynamic configuration, light jet 1
Efecto de los parámetros de corte del torneado en la rugosidad superficial de acero AISI-1020 rec... more Efecto de los parámetros de corte del torneado en la rugosidad superficial de acero AISI-1020 recocido Efeito dos parâmetros de corte do torneado na rugosidade superficial de aço AISI-1020 recozido
Scientific Research and Essays, 2010
Titanium alloys have been widely used in industries, especially aerospace industries, due to thei... more Titanium alloys have been widely used in industries, especially aerospace industries, due to their good mechanical and chemical properties. However, machining of titanium alloys involves expensive tooling cost at the expense of getting good surface roughness. This paper describes a comprehensive study of end milling of titanium alloys. The study investigated the optimum parameters that could produce significant good surface roughness whereby reducing tooling cost. It employed the Taguchi design method to optimize the surface roughness quality in a Computer Numerical Control (CNC) end mills. The control parameters were spindle speed, feed rate, depth of cut and type of end milling tool. On the other hand, the noise parameters were coolant pressure and patterns of cut. Then, an orthogonal array of L 8 (2 7) and analysis of variance (ANOVA) were carried out to identify the significant factors affecting the surface roughness. The best parameters were then chosen based on the signal-to-noise ratio (SNR). The experimental results indicated that the most significant factors affecting the surface roughness of Titanium alloy during end milling process were primarily the spindle speed of machine, secondly, the type of end mills tool used, thirdly, the feed rate adopted and lastly, the depth of cut chosen.
ITE Technical Report, 1998
In this paper. a new method of obtaining specular surface shape by using five degrees of freedom ... more In this paper. a new method of obtaining specular surface shape by using five degrees of freedom camera system is described. The normal vectors of the surface are extracted by achieving the coincident condition between the camera axis and the surface normal vector. This method ...
The Journal of the Institute of Image Information and Television Engineers, 2000
Non-linear finite element code ABAQUS/Explicit was employed to evaluate the energy absorption cha... more Non-linear finite element code ABAQUS/Explicit was employed to evaluate the energy absorption characteristics of concentric circular tubes subjected to impact in the axial direction. Thin-walled circular tube plays a vital role as energy absorber due to its high energy absorption capacity. However, the main drawback of existing tube type energy absorber is the high initial peak load. This work evaluates
Applied Mechanics and Materials, 2014
The use of nanocoolant is suspected to have effects on erosion-corrosion of piping systems in hea... more The use of nanocoolant is suspected to have effects on erosion-corrosion of piping systems in heat exchanger. This study was carried out to determine the erosion corrosion of AISI 316 stainless steel in solutions containing nanoparticles. The experiments used rotating cylinder electrode (RCE) at rotational speed of 0-1800 rpm under varying temperature of 30oC-70oC. Corrosion rate was measured using linear polarization resistance (LPR) method and erosion was indicated by measuring average depth of surface of the samples (surface roughness). The results showed that both corrosion rate and surface roughness of samples have increased when temperature and rotation speed increased. The erosion-corrosion effects of nanocoolant were lower in stagnant condition. Comparing with conventional coolant, the nanofluid showed significant differences. In flow conditions, the effects were remarkable. It was also found that maximum synergism erosion and corrosion were occurred at higher temperature an...
surfaces
: In this report, we describe a new method in obtaining a 3D shape of specular surface by using f... more : In this report, we describe a new method in obtaining a 3D shape of specular surface by using five degrees of freedom (5-DOF) camera. We use the principle that the normal vectors of the surface are extracted by aligning the camera axis and the surface normal vector. ...
Proceedings of the 2010 …, 2010
This paper describes a conceptual design of fuselage structure for very light jet aircraft by usi... more This paper describes a conceptual design of fuselage structure for very light jet aircraft by using CAD software as the design tool. Specific size and performance, the number of competing designs and the commonality of features with existing light jet aircraft are factors need to be considered in the design process. This conceptual design develops the first general size and configuration for a new light jet aircraft fuselage structure. The model of the fuselage structure is then undergoing engineering simulation programmed which is based on the finite element method. In this analysis, problems with multiple components are modeled by associating the geometry defining each component with the appropriate material model and specifying component interaction. Besides that, the load increments and convergence tolerance are continually adjusted to ensure an accurate solution is obtained.
Advanced Materials Research, 2014
This paper presents the effects of cutting parameters and the corresponding prediction model on t... more This paper presents the effects of cutting parameters and the corresponding prediction model on the surface roughness in the machining of AlSi/AlN metal matrix composite (MMC). This new composite material was fabricated by reinforcing smaller sizes of AlN particles at volume fractions of 10%, 15% and 20% with AlSi alloy. The machining experiments involved of uncoated carbide tool and PVD TiAlN coated carbide and conducted at different cutting parameters of cutting speed (240-400m/min), feed rate (0.3-0.5mm/tooth) and depth of cut (0.3-0.5mm) under dry cutting conditions. Taguchi's L18 orthogonal arrays approach was performed to determine the optimum cutting parameters using a signal-to-noise (S/N) ratio according to the stipulation of the smaller-the-better. The test results revealed that the type of cutting tool is the most significant factor contributing to the surface roughness of the machined material. A mathematical model of surface roughness has been developed using regression analysis as a function of all parameters with an average error of 10% can be observed between the predicted and experimental values. Furthermore, the optimum cutting parameters was predicted; A1 (uncoated carbide), B2 (cutting speed: 320m/min), C2 (feed rate: 0.4mm/tooth), D2 (axial depth: 0.4mm) and E1 (10% reinforcement) and validation experiment showed the reliable results.
Applied Mechanics and Materials, 2011
In order to be economically viable and competitive, the current trends in designing very light je... more In order to be economically viable and competitive, the current trends in designing very light jet aircraft have shown that it is essential to improve the aircraft performance and operational flexibility goal, nevertheless have an efficient cost. The application of unconventional configuration has attracted the designer to achieve that goal. This paper discusses the prospective design of unconventional arrangement which will be applied for very light jet aircraft. The existing of a very light jet configurations is reviewed. New concepts of unconventional configuration for this type of aircraft are discussed. The three-surface configuration is then proposed for the design project. The configuration offers stability and unobstructed cabin. With the appropriate design, the additional weight and interference drag due to the extra surface can be reduced. The new design of aircraft configuration and cabin are discussed. High Speed Natural Laminar Flow airfoil is applied to obtain High Lif...
... KHAIRI YUSUF, PRASETYO EDI and AMIR RADZI ABDUL GHANI Department of Engineering Design and Ma... more ... KHAIRI YUSUF, PRASETYO EDI and AMIR RADZI ABDUL GHANI Department of Engineering Design and Manufacture Faculty of Engineering, University of Malaya 50603 Kuala Lumpur ... The normal vectors of the surface are extracted by five degrees of freedom camera system. ...
WSEAS Transactions on Applied and …
Abstract: - This paper discusses the design of light jet aircraft (LJA) in the university level. ... more Abstract: - This paper discusses the design of light jet aircraft (LJA) in the university level. The design process that covers by this paper is just from conceptual approach. Current technical information of the light jet aircraft in the market will be studied for competitor analysis ...
… and Computers in …, 2009
This paper intends to present the conceptual design of very light jet (VLJ) aircraft in the unive... more This paper intends to present the conceptual design of very light jet (VLJ) aircraft in the university level. The design process that covers by this paper is just from conceptual approach. Current technical information of the business jet in the market will be studied for competitor analysis purpose. After that, the calculation process will take part, like initial sizing, performance sizing, initial sizing of main component, weight breakdown, cg (centre of gravity) position and aircraft performance. This paper will only concentrate on conceptual design, the next stage of design can be continuing in future with the data from this paper.
Proceedings of the …, 2010
Current trends in the design of very light jet aircraft have shown that in order to be economic... more Current trends in the design of very light jet aircraft have shown that in order to be economically viable and competitive, it is essential to improve the aircraft performance and operational flexibility goal, but still have an efficient cost. The application of unconventional ...
... 6) Obtaining 3D Shape of Specular Surface Using Five Degrees of Freedom Camera System([マルチメディ... more ... 6) Obtaining 3D Shape of Specular Surface Using Five Degrees of Freedom Camera System([マルチメディア情報処理研究会映像表現研究会ネットワ-ク映像メディア研究会画像情報シ ステム研究会]合同). Yusuf Khairi; Toyohashi Univ. Miyake Tetsuo; Toyohashi Univ. 本文を読む／ ...
Abstract:- This paper intends to present the conceptual design of very light jet (VLJ) aircraft i... more Abstract:- This paper intends to present the conceptual design of very light jet (VLJ) aircraft in the university level. The design process that covers by this paper is just from conceptual approach. Current technical information of the business jet in the market will be studied for competitor analysis purpose. After that, the calculation process will take part, like initial sizing, performance sizing, initial sizing of main component, weight breakdown, cg (centre of gravity) position and aircraft performance. This paper will only concentrate on conceptual design, the next stage of design can be continuing in future with the data from this paper. Key-Words:- conceptual design, wing design, aircraft design, aerodynamic configuration, light jet 1
Efecto de los parámetros de corte del torneado en la rugosidad superficial de acero AISI-1020 rec... more Efecto de los parámetros de corte del torneado en la rugosidad superficial de acero AISI-1020 recocido Efeito dos parâmetros de corte do torneado na rugosidade superficial de aço AISI-1020 recozido
Scientific Research and Essays, 2010
Titanium alloys have been widely used in industries, especially aerospace industries, due to thei... more Titanium alloys have been widely used in industries, especially aerospace industries, due to their good mechanical and chemical properties. However, machining of titanium alloys involves expensive tooling cost at the expense of getting good surface roughness. This paper describes a comprehensive study of end milling of titanium alloys. The study investigated the optimum parameters that could produce significant good surface roughness whereby reducing tooling cost. It employed the Taguchi design method to optimize the surface roughness quality in a Computer Numerical Control (CNC) end mills. The control parameters were spindle speed, feed rate, depth of cut and type of end milling tool. On the other hand, the noise parameters were coolant pressure and patterns of cut. Then, an orthogonal array of L 8 (2 7) and analysis of variance (ANOVA) were carried out to identify the significant factors affecting the surface roughness. The best parameters were then chosen based on the signal-to-noise ratio (SNR). The experimental results indicated that the most significant factors affecting the surface roughness of Titanium alloy during end milling process were primarily the spindle speed of machine, secondly, the type of end mills tool used, thirdly, the feed rate adopted and lastly, the depth of cut chosen.
ITE Technical Report, 1998
In this paper. a new method of obtaining specular surface shape by using five degrees of freedom ... more In this paper. a new method of obtaining specular surface shape by using five degrees of freedom camera system is described. The normal vectors of the surface are extracted by achieving the coincident condition between the camera axis and the surface normal vector. This method ...
The Journal of the Institute of Image Information and Television Engineers, 2000
Non-linear finite element code ABAQUS/Explicit was employed to evaluate the energy absorption cha... more Non-linear finite element code ABAQUS/Explicit was employed to evaluate the energy absorption characteristics of concentric circular tubes subjected to impact in the axial direction. Thin-walled circular tube plays a vital role as energy absorber due to its high energy absorption capacity. However, the main drawback of existing tube type energy absorber is the high initial peak load. This work evaluates
Applied Mechanics and Materials, 2014
The use of nanocoolant is suspected to have effects on erosion-corrosion of piping systems in hea... more The use of nanocoolant is suspected to have effects on erosion-corrosion of piping systems in heat exchanger. This study was carried out to determine the erosion corrosion of AISI 316 stainless steel in solutions containing nanoparticles. The experiments used rotating cylinder electrode (RCE) at rotational speed of 0-1800 rpm under varying temperature of 30oC-70oC. Corrosion rate was measured using linear polarization resistance (LPR) method and erosion was indicated by measuring average depth of surface of the samples (surface roughness). The results showed that both corrosion rate and surface roughness of samples have increased when temperature and rotation speed increased. The erosion-corrosion effects of nanocoolant were lower in stagnant condition. Comparing with conventional coolant, the nanofluid showed significant differences. In flow conditions, the effects were remarkable. It was also found that maximum synergism erosion and corrosion were occurred at higher temperature an...
surfaces
: In this report, we describe a new method in obtaining a 3D shape of specular surface by using f... more : In this report, we describe a new method in obtaining a 3D shape of specular surface by using five degrees of freedom (5-DOF) camera. We use the principle that the normal vectors of the surface are extracted by aligning the camera axis and the surface normal vector. ...
Proceedings of the 2010 …, 2010
This paper describes a conceptual design of fuselage structure for very light jet aircraft by usi... more This paper describes a conceptual design of fuselage structure for very light jet aircraft by using CAD software as the design tool. Specific size and performance, the number of competing designs and the commonality of features with existing light jet aircraft are factors need to be considered in the design process. This conceptual design develops the first general size and configuration for a new light jet aircraft fuselage structure. The model of the fuselage structure is then undergoing engineering simulation programmed which is based on the finite element method. In this analysis, problems with multiple components are modeled by associating the geometry defining each component with the appropriate material model and specifying component interaction. Besides that, the load increments and convergence tolerance are continually adjusted to ensure an accurate solution is obtained.
Advanced Materials Research, 2014
This paper presents the effects of cutting parameters and the corresponding prediction model on t... more This paper presents the effects of cutting parameters and the corresponding prediction model on the surface roughness in the machining of AlSi/AlN metal matrix composite (MMC). This new composite material was fabricated by reinforcing smaller sizes of AlN particles at volume fractions of 10%, 15% and 20% with AlSi alloy. The machining experiments involved of uncoated carbide tool and PVD TiAlN coated carbide and conducted at different cutting parameters of cutting speed (240-400m/min), feed rate (0.3-0.5mm/tooth) and depth of cut (0.3-0.5mm) under dry cutting conditions. Taguchi's L18 orthogonal arrays approach was performed to determine the optimum cutting parameters using a signal-to-noise (S/N) ratio according to the stipulation of the smaller-the-better. The test results revealed that the type of cutting tool is the most significant factor contributing to the surface roughness of the machined material. A mathematical model of surface roughness has been developed using regression analysis as a function of all parameters with an average error of 10% can be observed between the predicted and experimental values. Furthermore, the optimum cutting parameters was predicted; A1 (uncoated carbide), B2 (cutting speed: 320m/min), C2 (feed rate: 0.4mm/tooth), D2 (axial depth: 0.4mm) and E1 (10% reinforcement) and validation experiment showed the reliable results.
Applied Mechanics and Materials, 2011
In order to be economically viable and competitive, the current trends in designing very light je... more In order to be economically viable and competitive, the current trends in designing very light jet aircraft have shown that it is essential to improve the aircraft performance and operational flexibility goal, nevertheless have an efficient cost. The application of unconventional configuration has attracted the designer to achieve that goal. This paper discusses the prospective design of unconventional arrangement which will be applied for very light jet aircraft. The existing of a very light jet configurations is reviewed. New concepts of unconventional configuration for this type of aircraft are discussed. The three-surface configuration is then proposed for the design project. The configuration offers stability and unobstructed cabin. With the appropriate design, the additional weight and interference drag due to the extra surface can be reduced. The new design of aircraft configuration and cabin are discussed. High Speed Natural Laminar Flow airfoil is applied to obtain High Lif...
... KHAIRI YUSUF, PRASETYO EDI and AMIR RADZI ABDUL GHANI Department of Engineering Design and Ma... more ... KHAIRI YUSUF, PRASETYO EDI and AMIR RADZI ABDUL GHANI Department of Engineering Design and Manufacture Faculty of Engineering, University of Malaya 50603 Kuala Lumpur ... The normal vectors of the surface are extracted by five degrees of freedom camera system. ...
WSEAS Transactions on Applied and …
Abstract: - This paper discusses the design of light jet aircraft (LJA) in the university level. ... more Abstract: - This paper discusses the design of light jet aircraft (LJA) in the university level. The design process that covers by this paper is just from conceptual approach. Current technical information of the light jet aircraft in the market will be studied for competitor analysis ...
… and Computers in …, 2009
This paper intends to present the conceptual design of very light jet (VLJ) aircraft in the unive... more This paper intends to present the conceptual design of very light jet (VLJ) aircraft in the university level. The design process that covers by this paper is just from conceptual approach. Current technical information of the business jet in the market will be studied for competitor analysis purpose. After that, the calculation process will take part, like initial sizing, performance sizing, initial sizing of main component, weight breakdown, cg (centre of gravity) position and aircraft performance. This paper will only concentrate on conceptual design, the next stage of design can be continuing in future with the data from this paper.
Proceedings of the …, 2010
Current trends in the design of very light jet aircraft have shown that in order to be economic... more Current trends in the design of very light jet aircraft have shown that in order to be economically viable and competitive, it is essential to improve the aircraft performance and operational flexibility goal, but still have an efficient cost. The application of unconventional ...
... 6) Obtaining 3D Shape of Specular Surface Using Five Degrees of Freedom Camera System([マルチメディ... more ... 6) Obtaining 3D Shape of Specular Surface Using Five Degrees of Freedom Camera System([マルチメディア情報処理研究会映像表現研究会ネットワ-ク映像メディア研究会画像情報シ ステム研究会]合同). Yusuf Khairi; Toyohashi Univ. Miyake Tetsuo; Toyohashi Univ. 本文を読む／ ...