Search results for "material model"

showing 3 items of 3 documents

Viscoelastic material models for more accurate polyethylene wear estimation

2018

Wear debris from ultra-high-molecular-weight polyethylene components used for joint replacement prostheses can cause significant clinical complications, and it is essential to be able to predict implant wear accurately in vitro to prevent unsafe implant designs continuing to clinical trials. The established method to predict wear is simulator testing, but the significant equipment costs, experimental time and equipment availability can be prohibitive. It is possible to predict implant wear using finite element methods, though those reported in the literature simplify the material behaviour of polyethylene and typically use linear or elastoplastic material models. Such models cannot represe…

Materials scienceJoint replacementmedicine.medical_treatmentWear debris02 engineering and technologyfractional viscoelasticityViscoelasticityModeling and simulationchemistry.chemical_compound0203 mechanical engineeringmedicineMechanics of MaterialUnicompartmental knee arthroplastymaterial modelbusiness.industryApplied MathematicsMechanical EngineeringStructural engineeringPolyethylene021001 nanoscience & nanotechnologyStrength of materialsfinite element analysiFinite element method020303 mechanical engineering & transportschemistryMechanics of MaterialsPolyethylene wearModeling and Simulation0210 nano-technologybusinessunicompartmental knee arthroplasty
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Assessment of material models through simple machining tests

2008

The accuracy of the results obtained from FEM simulation of machining operations depends on the accuracy of input data. Among these, the flow stress data of the workpiece are extremely important together with the friction along the tool-chip interface. In this study, an identification procedure for the determination of material parameters that are used for the FEM simulation of machining processes is proposed. The procedure is based on the coupling of a numerical identification procedure and Arbitrarian Lagrangian Eulerian (ALE) Finite Element simulations of turning operations. An experimental campaign was developed in order to calibrate the model and to validate the procedure. The basic id…

0209 industrial biotechnologyEngineeringInterface (computing)Mechanical engineeringComputational intelligence02 engineering and technologymaterial modelsFlow stressFinite Element Simulation[SPI]Engineering Sciences [physics]020901 industrial engineering & automation0203 mechanical engineeringMachiningmodelling of machiningGeneral Materials ScienceSettore ING-IND/16 - Tecnologie E Sistemi Di LavorazioneMaterial modellingInverse ApproachCouplingbusiness.industryProcess (computing)MachiningFinite element methodIdentification (information)020303 mechanical engineering & transportsbusinessInternational Journal of Material Forming
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Green composites based on biodegradable polymers and anchovy (Engraulis Encrasicolus) waste suitable for 3D printing applications

2022

Every day large amounts of fish waste are produced and grossly discarded in markets around the world causing environmental and hygiene issue. The use of these scraps for the production of materials with higher added value can definitely contributed to solve this problem. In this work, 10% and 20% of anchovy fishbone powder (EE), obtained by market waste, were microbiological and mechanical tested and subsequently added to polylactic acid (PLA) and to a commercial blend of biodegradable co-polyesters (Mater-Bi®). Rheological characterization suggests the potential printability of all prepared composites filaments. 10% EE filled composites showed outstanding printability. Morphological analys…

B. Mechanical propertiesE. 3D printingEngraulis encrasicolusC. Material modellingA. Bio compositesSettore ICAR/13 - Disegno IndustrialeGeneral EngineeringCeramics and CompositesD. Scanning electron microscopy (SEM)Composites Science and Technology
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