Search results for " MATERIAL FLOW"

showing 7 items of 7 documents

Design of the friction stir welding tool using the continuum based FEM model

2006

In friction stir welding (FSW), the welding tool geometry plays a fundamental role in obtaining desirable microstructures in the weld and the heat-affected zones, and consequently improving strength and fatigue resistance of the joint. In this paper, a FSW process with varying pin geometries (cylindrical and conical) and advancing speeds is numerically modeled, and a thermo-mechanically coupled, rigid-viscoplastic, fully 3D FEM analysis able to predict the process variables as well as the material flow pattern and the grain size in the welded joints is performed. The obtained results allow finding optimal tool geometry and advancing speed for improving nugget integrity of aluminum alloys.

FSWFEM Tool geometry Material flow Grain sizeSettore ING-IND/16 - Tecnologie E Sistemi Di Lavorazione
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Process Mechanics in Friction Stir Welding of Magnesium Alloys: Experimental and Numerical Analysis

2012

Friction Stir Welding Taylored blanks material flowSettore ING-IND/16 - Tecnologie E Sistemi Di Lavorazione
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On the fem simulation of FSW and LFW operations

2010

FSWLFWFEM material flowSettore ING-IND/16 - Tecnologie E Sistemi Di Lavorazione
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DOMESTIC MATERIAL CONSUMPTION INDICATOR AND NATURAL RESOURCES: A EUROPEAN ANALYSIS OF THE ENVIRONMENTAL KUZNETS CURVE

2014

The study investigates the relation between per capita Domestic Material Consumption indicator (DMC) and per capita income. Economic literature focuses mainly on air, water and land pollution while we consider as environmental degradation the consumption on natural resources extracted from the environment. Using a cross– European panel of countries over the period 2000-2011, our results confirm the absence of an Environmental Kuznets Curve (EKC) between per capita DMC and per capita GDP both for EU-27 vs. 30 European countries and for Western vs. Eastern European countries. The turning points are so high that it is present a monotonic increasing relation between DMC indicator and GDP.

Natural Resource Use Environmental degradation Environmental Kuznets Curve Domestic Material Consumption and Economy-wide Material Flows Accounts.
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Material Flow in FSW of AA7075 - T6 butt joint: numerical simulations and experimental verifications

2006

Friction stir welding (FSW) has reached a large interest in the scientific community and in the recent years also in the industrial environment, owing to the advantages of such solid state welding process with respect to the classic ones. Advanced finite element method tools are needed in order to develop an effective engineering of the processes; quantitative results can be acquired from numerical simulations once the basic information such as the material flow is certain. A 3D Lagrangian implicit coupled rigid viscoplastic model has already been developed by the authors to simulate FSW of butt joints. In the present paper the material flow in the FSW of AA7075–T6 butt joints is investigat…

Materials scienceViscoplasticitybusiness.industrySolid-stateStructural engineeringCondensed Matter PhysicsFSW FEM MATERIAL FLOW TOOL GEOMETRYFinite element methodMaterial flowMetal flowWelding processButt jointFriction stir weldingGeneral Materials SciencebusinessSettore ING-IND/16 - Tecnologie E Sistemi Di Lavorazione
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On the material flow in fsw of T-joints: influence of geometrical and tecnological parameters

2008

Friction stir welding (FSW) now definitively reached a large interest in the scientific community and what is more in the industrial environment, due to the advantages of such solid state welding process with respect to the classic ones. The latter aspects are relevant also with reference to joints characterized by a complex geometry. What is more, advanced FEM tools permit to develop effective engineering of the processes; quantitative results can be acquired from numerical simulations once basic information, as the process mechanics and the material flow, are certain. Material flow plays a fundamental role in FSW since it determines the effectiveness of the joints or, in turn, the insurge…

Engineeringbusiness.industryMechanical EngineeringProcess (computing)Mechanical engineeringWeldingIndustrial and Manufacturing EngineeringFinite element methodComputer Science ApplicationsMaterial flowlaw.inventionBrassMetal flowComplex geometryControl and Systems Engineeringlawvisual_artvisual_art.visual_art_mediumFriction stir weldingFSW T-joints FEM material flow tool geometrybusinessSettore ING-IND/16 - Tecnologie E Sistemi Di LavorazioneSoftware
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A continuum based fem model for friction stir welding—model development

2006

Although friction stir welding (FSW) has been successfully used to join materials that are difficult-to-weld or unweldeable by fusion welding methods, it is still in its early development stage and, therefore, a scientific knowledge based predictive model is of significant help for thorough understanding of FSW process. In this paper, a continuum based FEM model for friction stir welding process is proposed, that is 3D Lagrangian implicit, coupled, rigid-viscoplastic. This model is calibrated by comparing with experimental results of force and temperature distribution, then is used to investigate the distribution of temperature and strain in heat affect zone and the weld nugget. The model c…

Heat-affected zoneMaterials scienceViscoplasticityMechanical EngineeringMetallurgyMechanical engineeringWeld lineWeldingCondensed Matter PhysicsFinite element methodfriction stir welding FEW material flowlaw.inventionMaterial flowFusion weldingMechanics of MaterialslawFriction stir weldingGeneral Materials ScienceSettore ING-IND/16 - Tecnologie E Sistemi Di LavorazioneMaterials Science and Engineering: A
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