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   A Coupled Rigidviscoplastic Numerical Modeling For Evaluating Effects of Shoulder Geometry on Friction Stirwelded Aluminum Alloys  
   
نویسنده Fabregas Villegas J. ,A. ,Unfried-Silgado J.
منبع International Journal Of Engineering - 2019 - دوره : 32 - شماره : 2 - صفحه:313 -321
چکیده    Shoulder geometry of tool plays an important role in frictionstir welding because it controls thermal interactions and heat generation. this work is proposed and developed a coupled rigidviscoplastic numerical modeling based on computational fluid dynamics and finite element calculations aiming to understand these interactions. model solves mass conservation, momentum, and energy equations in three dimensions, using appropriate boundary conditions, considering mass flow as a nonnewtonian, incompressible, viscoplastic material. boundary conditions of heat transfer and material flow were determined using a sticking/sliding contact condition at tool / workpiece interface. thermal history, as well as shear stress and rotational speed fields, forces and torque values for three shoulder geometry conditions were calculated. numerical results of thermal history, torque and forces during welding showed good correlation with experimentally measured data.
کلیدواژه Friction Stir Welding ,Finite Element Model ,Aluminum Alloy ,Heat Generation ,Plasticity
آدرس Universidad Autónoma Del Caribe, Departamento De Ingeniería Mecánica, Grupo Imtef, Colombia, Universidad De Córdoba, Departamento De Ingeniería Mecánica, Grupo Ict, Colombia, Universidad De Córdoba, Departamento De Ingeniería Mecánica, Grupo Ict, Colombia
پست الکترونیکی jimyunfried@correo.unicordoba.edu.co
 
     
   
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