Search results for "Weld line"

showing 5 items of 5 documents

Effect of some injection molding processing conditions on weld lines characteristics

1988

The influence of injection and mold temperature as well as holding time on the knit-line characteristics in samples of Nylon 6 obtained by injection molding was analysed. The characteristics of the surface defect seem to be governed by the shrinkage rate and amount in the weld line zone.

Materials scienceWeld lineMolding (process)WeldingShrinkage ratemedicine.disease_causelaw.inventionchemistry.chemical_compoundNylon 6chemistrylawMoldmedicineComposite materialThermoplastic polymerHolding time
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Influence of Welding Time on Tensile-Shear Strength of Linear Friction Welded Birch (Betula pendula L.) Wood

2015

Linear friction welding of wood is a bonding process applied to wood and during which a stiff bond line is formed by the softening and rehardening of wood components to form a composite material composed mainly of wood fibres embedded in a modified lignin matrix. Unfortunately, the bonds tend to spontaneously delaminate or lose their strength when exposed to moist conditions. Some approaches were previously applied to overcome this problem, but so far a suitable solution has not been found. This paper presents results of applying post-welding thermal modification to reduce the moisture sensitivity of welded wood. The experiments included welding of birch wood, thermal modification under sup…

Environmental EngineeringMaterials sciencelcsh:BiotechnologyNon-destructive testingExtrapolationBioengineeringWeldingStandard deviationlaw.inventionWelding timelawlcsh:TP248.13-248.65Nondestructive testingFriction weldingComposite materialWFPWaste Management and DisposalWelding of woodbusiness.industryMetallurgyBirchtechnology industry and agricultureWeld lineTensile-shear strengthBond linerespiratory systemParameter optimizationBetula pendulaX-ray microtomographyrikkomaton aineenkoetusAdhesivebusiness
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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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Experimental and numerical investigation on a new FSW based metal to composite joining technique

2018

Abstract In the last decades, different techniques were proposed to join aluminum sheets with composites materials. Each of them has advantages and weak points over the others and new techniques and patents are continuously developed to overcome these difficulties. In this paper an experimental and numerical investigation on a new Friction Stir Welding based approach to mechanically join AA6082-T6 to self-reinforced polypropylene is presented. The aluminum sheet is pre-holed along both the sides of the weld line and a pinless tool generates the heat and pressure needed to prompt back-extrusion of the composite. New experimental fixtures and hole designs were investigated in order to enhance…

010302 applied physicsMaterials scienceFSWStrategy and ManagementComposite numberAluminum AlloyProcess (computing)Mechanical engineeringWeld line02 engineering and technologyManagement Science and Operations ResearchMechanical resistance021001 nanoscience & nanotechnology01 natural sciencesIndustrial and Manufacturing EngineeringStrategy and Management1409 Tourism Leisure and Hospitality Management0103 physical sciencesFriction stir weldingJoin (sigma algebra)Dissimilar jointThermoplastic compositePolypropylene0210 nano-technologySettore ING-IND/16 - Tecnologie E Sistemi Di LavorazioneJournal of Manufacturing Processes
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An Innovative Friction Stir Welding Based Technique to Produce Dissimilar Light Alloys to Thermoplastic Matrix Composite Joints

2016

Abstract Aluminum sheets can be joined to composite materials with different techniques. Each of them has advantages and weak points over the others. In literature, new techniques and patents are continuously developed to overcome these difficulties. In the paper a new Friction Stir Welding based approach is proposed to mechanically join AA6082-T6 to self-reinforced polypropylene. The aluminum sheet is pre-holed along both the sides of the weld line. A pinless tool generates the heat and pressure needed to activate back-extrusion of the composite. Joints have been produced with varying hole diameter and pitch. The mechanical resistance of the joint has been evaluated and the different failu…

Polypropylene0209 industrial biotechnologyMaterials scienceFSWComposite numberProcess (computing)chemistry.chemical_elementWeld line02 engineering and technologyFSW Dissimilar joint aluminum alloy Polypropylene.021001 nanoscience & nanotechnologyIndustrial and Manufacturing EngineeringDisplacement (vector)chemistry.chemical_compound020901 industrial engineering & automationchemistryArtificial IntelligenceAluminiumFriction stir weldingDissimilar jointaluminum alloyComposite materialPolypropylene0210 nano-technologyJoint (geology)
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