The Experts below are selected from a list of 69 Experts worldwide ranked by ideXlab platform
Mario Fafard - One of the best experts on this subject based on the ideXlab platform.
-
a new method for the determination of Formability Limit in the tube drawing process
2011Co-Authors: Reza Bihamta, Michel Guillot, Guillaume Damours, Ahmed Rahem, Mario FafardAbstract:A new method for determination of Formability Limit in the tube drawing process was developed using the position controlled mandrel technique. In this method the mandrel has conical angle in a way that with change of mandrel position, the distance between die and mandrel will be changed and various combinations of thicknesses can be obtained using just one conic mandrel. The advantage of this method is determining the Limit cross-sectional reduction for each tube dimension with just one experiment. The realized drawing Limit tests on the aluminium tubes show that the average maximum area reduction of AA6063 tubes is about 40%. An optimal tube drawing schedule for production of the constant wall thickness aluminium tubes with high crosssectional reduction in one pass was successfully established based on the proposed Formability Limit test.
-
investigation of the Formability Limit of aluminium tubes drawn with variable wall thickness
Journal of Materials Processing Technology, 2011Co-Authors: Reza Bihamta, Michel Guillot, Guillaume Damours, Ahmed Rahem, Mario FafardAbstract:Structural aluminium tubes have very important industrial applications, particularly in automobile industry. Tube drawing process is widely used to reduce the outer and inner diameters of tubes. An important issue in the tube drawing process to obtain variable wall thickness is how to determinate and predict its Formability Limits. Previously published works generally deal with the Formability Limit of conventional tube drawing based on experimental analysis, analytical method and finite element method. However, in the case of variable wall thickness tubes, there is a lack of knowledge and data in order to predict their Limit of Formability. In the present study, both theoretical and experimental methods are proposed for estimating the Formability Limit of the variable wall thickness aluminium tubes used for the transportation purposes. A modification of a conical mandrel was proposed and a special control system for mandrel displacement during the process was used to carry out the drawing tests. During the drawing process, the tube pulling axis was controlled at constant speed while the mandrel was moved to achieve the continuously variable wall thickness. The Formability Limit in term of minimum wall thickness and maximum area reduction was obtained before tube rupture. These values are useful data for the determination of the extent of deformation during a drawing process that a material can experience without failure. The maximum drawing stress ratio was also determined experimentally. Further, an extension of an upper bound solution developed in previous publications is proposed to predict the drawing stress field. The maximum drawing stress ratio was used as a criterion for fracture analysis. It was shown that the analytical model with its new extension combined to the fracture criterion predicts quite well the thickness and area reduction Limit. The experimental studies were completed by examining the microstructure and strain field at the Limit state.
Reza Bihamta - One of the best experts on this subject based on the ideXlab platform.
-
a new method for the determination of Formability Limit in the tube drawing process
2011Co-Authors: Reza Bihamta, Michel Guillot, Guillaume Damours, Ahmed Rahem, Mario FafardAbstract:A new method for determination of Formability Limit in the tube drawing process was developed using the position controlled mandrel technique. In this method the mandrel has conical angle in a way that with change of mandrel position, the distance between die and mandrel will be changed and various combinations of thicknesses can be obtained using just one conic mandrel. The advantage of this method is determining the Limit cross-sectional reduction for each tube dimension with just one experiment. The realized drawing Limit tests on the aluminium tubes show that the average maximum area reduction of AA6063 tubes is about 40%. An optimal tube drawing schedule for production of the constant wall thickness aluminium tubes with high crosssectional reduction in one pass was successfully established based on the proposed Formability Limit test.
-
investigation of the Formability Limit of aluminium tubes drawn with variable wall thickness
Journal of Materials Processing Technology, 2011Co-Authors: Reza Bihamta, Michel Guillot, Guillaume Damours, Ahmed Rahem, Mario FafardAbstract:Structural aluminium tubes have very important industrial applications, particularly in automobile industry. Tube drawing process is widely used to reduce the outer and inner diameters of tubes. An important issue in the tube drawing process to obtain variable wall thickness is how to determinate and predict its Formability Limits. Previously published works generally deal with the Formability Limit of conventional tube drawing based on experimental analysis, analytical method and finite element method. However, in the case of variable wall thickness tubes, there is a lack of knowledge and data in order to predict their Limit of Formability. In the present study, both theoretical and experimental methods are proposed for estimating the Formability Limit of the variable wall thickness aluminium tubes used for the transportation purposes. A modification of a conical mandrel was proposed and a special control system for mandrel displacement during the process was used to carry out the drawing tests. During the drawing process, the tube pulling axis was controlled at constant speed while the mandrel was moved to achieve the continuously variable wall thickness. The Formability Limit in term of minimum wall thickness and maximum area reduction was obtained before tube rupture. These values are useful data for the determination of the extent of deformation during a drawing process that a material can experience without failure. The maximum drawing stress ratio was also determined experimentally. Further, an extension of an upper bound solution developed in previous publications is proposed to predict the drawing stress field. The maximum drawing stress ratio was used as a criterion for fracture analysis. It was shown that the analytical model with its new extension combined to the fracture criterion predicts quite well the thickness and area reduction Limit. The experimental studies were completed by examining the microstructure and strain field at the Limit state.
Michel Guillot - One of the best experts on this subject based on the ideXlab platform.
-
a new method for the determination of Formability Limit in the tube drawing process
2011Co-Authors: Reza Bihamta, Michel Guillot, Guillaume Damours, Ahmed Rahem, Mario FafardAbstract:A new method for determination of Formability Limit in the tube drawing process was developed using the position controlled mandrel technique. In this method the mandrel has conical angle in a way that with change of mandrel position, the distance between die and mandrel will be changed and various combinations of thicknesses can be obtained using just one conic mandrel. The advantage of this method is determining the Limit cross-sectional reduction for each tube dimension with just one experiment. The realized drawing Limit tests on the aluminium tubes show that the average maximum area reduction of AA6063 tubes is about 40%. An optimal tube drawing schedule for production of the constant wall thickness aluminium tubes with high crosssectional reduction in one pass was successfully established based on the proposed Formability Limit test.
-
investigation of the Formability Limit of aluminium tubes drawn with variable wall thickness
Journal of Materials Processing Technology, 2011Co-Authors: Reza Bihamta, Michel Guillot, Guillaume Damours, Ahmed Rahem, Mario FafardAbstract:Structural aluminium tubes have very important industrial applications, particularly in automobile industry. Tube drawing process is widely used to reduce the outer and inner diameters of tubes. An important issue in the tube drawing process to obtain variable wall thickness is how to determinate and predict its Formability Limits. Previously published works generally deal with the Formability Limit of conventional tube drawing based on experimental analysis, analytical method and finite element method. However, in the case of variable wall thickness tubes, there is a lack of knowledge and data in order to predict their Limit of Formability. In the present study, both theoretical and experimental methods are proposed for estimating the Formability Limit of the variable wall thickness aluminium tubes used for the transportation purposes. A modification of a conical mandrel was proposed and a special control system for mandrel displacement during the process was used to carry out the drawing tests. During the drawing process, the tube pulling axis was controlled at constant speed while the mandrel was moved to achieve the continuously variable wall thickness. The Formability Limit in term of minimum wall thickness and maximum area reduction was obtained before tube rupture. These values are useful data for the determination of the extent of deformation during a drawing process that a material can experience without failure. The maximum drawing stress ratio was also determined experimentally. Further, an extension of an upper bound solution developed in previous publications is proposed to predict the drawing stress field. The maximum drawing stress ratio was used as a criterion for fracture analysis. It was shown that the analytical model with its new extension combined to the fracture criterion predicts quite well the thickness and area reduction Limit. The experimental studies were completed by examining the microstructure and strain field at the Limit state.
Guillaume Damours - One of the best experts on this subject based on the ideXlab platform.
-
a new method for the determination of Formability Limit in the tube drawing process
2011Co-Authors: Reza Bihamta, Michel Guillot, Guillaume Damours, Ahmed Rahem, Mario FafardAbstract:A new method for determination of Formability Limit in the tube drawing process was developed using the position controlled mandrel technique. In this method the mandrel has conical angle in a way that with change of mandrel position, the distance between die and mandrel will be changed and various combinations of thicknesses can be obtained using just one conic mandrel. The advantage of this method is determining the Limit cross-sectional reduction for each tube dimension with just one experiment. The realized drawing Limit tests on the aluminium tubes show that the average maximum area reduction of AA6063 tubes is about 40%. An optimal tube drawing schedule for production of the constant wall thickness aluminium tubes with high crosssectional reduction in one pass was successfully established based on the proposed Formability Limit test.
-
investigation of the Formability Limit of aluminium tubes drawn with variable wall thickness
Journal of Materials Processing Technology, 2011Co-Authors: Reza Bihamta, Michel Guillot, Guillaume Damours, Ahmed Rahem, Mario FafardAbstract:Structural aluminium tubes have very important industrial applications, particularly in automobile industry. Tube drawing process is widely used to reduce the outer and inner diameters of tubes. An important issue in the tube drawing process to obtain variable wall thickness is how to determinate and predict its Formability Limits. Previously published works generally deal with the Formability Limit of conventional tube drawing based on experimental analysis, analytical method and finite element method. However, in the case of variable wall thickness tubes, there is a lack of knowledge and data in order to predict their Limit of Formability. In the present study, both theoretical and experimental methods are proposed for estimating the Formability Limit of the variable wall thickness aluminium tubes used for the transportation purposes. A modification of a conical mandrel was proposed and a special control system for mandrel displacement during the process was used to carry out the drawing tests. During the drawing process, the tube pulling axis was controlled at constant speed while the mandrel was moved to achieve the continuously variable wall thickness. The Formability Limit in term of minimum wall thickness and maximum area reduction was obtained before tube rupture. These values are useful data for the determination of the extent of deformation during a drawing process that a material can experience without failure. The maximum drawing stress ratio was also determined experimentally. Further, an extension of an upper bound solution developed in previous publications is proposed to predict the drawing stress field. The maximum drawing stress ratio was used as a criterion for fracture analysis. It was shown that the analytical model with its new extension combined to the fracture criterion predicts quite well the thickness and area reduction Limit. The experimental studies were completed by examining the microstructure and strain field at the Limit state.
Ahmed Rahem - One of the best experts on this subject based on the ideXlab platform.
-
a new method for the determination of Formability Limit in the tube drawing process
2011Co-Authors: Reza Bihamta, Michel Guillot, Guillaume Damours, Ahmed Rahem, Mario FafardAbstract:A new method for determination of Formability Limit in the tube drawing process was developed using the position controlled mandrel technique. In this method the mandrel has conical angle in a way that with change of mandrel position, the distance between die and mandrel will be changed and various combinations of thicknesses can be obtained using just one conic mandrel. The advantage of this method is determining the Limit cross-sectional reduction for each tube dimension with just one experiment. The realized drawing Limit tests on the aluminium tubes show that the average maximum area reduction of AA6063 tubes is about 40%. An optimal tube drawing schedule for production of the constant wall thickness aluminium tubes with high crosssectional reduction in one pass was successfully established based on the proposed Formability Limit test.
-
investigation of the Formability Limit of aluminium tubes drawn with variable wall thickness
Journal of Materials Processing Technology, 2011Co-Authors: Reza Bihamta, Michel Guillot, Guillaume Damours, Ahmed Rahem, Mario FafardAbstract:Structural aluminium tubes have very important industrial applications, particularly in automobile industry. Tube drawing process is widely used to reduce the outer and inner diameters of tubes. An important issue in the tube drawing process to obtain variable wall thickness is how to determinate and predict its Formability Limits. Previously published works generally deal with the Formability Limit of conventional tube drawing based on experimental analysis, analytical method and finite element method. However, in the case of variable wall thickness tubes, there is a lack of knowledge and data in order to predict their Limit of Formability. In the present study, both theoretical and experimental methods are proposed for estimating the Formability Limit of the variable wall thickness aluminium tubes used for the transportation purposes. A modification of a conical mandrel was proposed and a special control system for mandrel displacement during the process was used to carry out the drawing tests. During the drawing process, the tube pulling axis was controlled at constant speed while the mandrel was moved to achieve the continuously variable wall thickness. The Formability Limit in term of minimum wall thickness and maximum area reduction was obtained before tube rupture. These values are useful data for the determination of the extent of deformation during a drawing process that a material can experience without failure. The maximum drawing stress ratio was also determined experimentally. Further, an extension of an upper bound solution developed in previous publications is proposed to predict the drawing stress field. The maximum drawing stress ratio was used as a criterion for fracture analysis. It was shown that the analytical model with its new extension combined to the fracture criterion predicts quite well the thickness and area reduction Limit. The experimental studies were completed by examining the microstructure and strain field at the Limit state.