Search results for " Fatigue analysis"

showing 3 items of 3 documents

FE Calculation Methodology for the Thermodynamic Fatigue Analysis of an Engine Component

2006

Thermo mechanical fatigue problem is treated to define an analysis methodology permitting the strength evaluation by reliability viewpoint. The main difficulty is the lack of both theoretical and experimental information; consequently the problem is treated verifying continually the validity and the limits of the developing solution method. The main task of the activity described in this paper was the development of a numerical methodology, based on FE analyses, for the evaluation of the structural behavior of engine components subjected to thermo mechanical fatigue phenomena. The chosen application was the exhaust manifold of an IC engine; FE analyses were executed following the standard m…

EngineeringExhaust manifoldbusiness.industryStructural engineeringFinite element methodEngines Fatigue analysis Manifolds Reliability Fatigue Exhaust systems Fluid dynamics Structural analysis Stress Finite element analysisStress (mechanics)Settore ING-IND/14 - Progettazione Meccanica E Costruzione Di MacchineCylinder headFluid dynamicsTransient (oscillation)businessReliability (statistics)Thermo-mechanical fatigueVolume 4: Fatigue and Fracture, Heat Transfer, Internal Combustion Engines, Manufacturing, and Technology and Society
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A coupled plasticity-damage cohesive-frictional interface for low-cycle fatigue analysis

2022

A novel thermodynamically consistent cohesive-frictional model for the analysis of interface degradation and failure under either monotonic quasi-static loading or cyclic loading in low-cycle fatigue problems is proposed. Starting from the definition of a suitable Helmholtz energy density function, a phenomenological interface model is developed in the framework of plasticity and damage mechanics. In particular, a coupled plasticitydamage activation function is defined and employed together the consistent evolution rules to capture the evolution of damage and plasticity under the action of the external loads. Due to the specific features of such threshold and flow rules, the initiation and …

Mechanics of MaterialsMechanical EngineeringGeneral Materials ScienceSettore ICAR/08 - Scienza Delle CostruzioniSettore ING-IND/04 - Costruzioni E Strutture AerospazialiCondensed Matter PhysicsCohesive zone modelling Low-cycle fatigue analysis Damage Elastic–plastic cohesive-frictional interface Composite bondingCivil and Structural EngineeringInternational Journal of Mechanical Sciences
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Valutazione in vitro dell’affaticamento di strumenti rotanti in nichel-titanio

2012

Riassunto Obiettivo L’obiettivo di questo lavoro e quello di valutare, in vitro, la fatica ciclica di ProFile, K3 e Twisted File, strumenti rotanti in nichel-titanio, in canali radicolari simulati aventi angoli di curvatura di 45°, 60° e 90°. Materiali e metodi Per effettuare questo studio sono stati utilizzati: 18 file 25/.06 ProFile; 18 file 25/.06 K3; 18 file 25/.06 Twisted File. La resistenza a fatica ciclica degli strumenti rotanti Ni-Ti e stata testata ad angolazioni di 45°, 60° e 90° mediante un modello sperimentale creato specificatamente. Risultati e conclusioni Dall’analisi dei dati e emersa una buona resistenza alla fatica ciclica per quanto concerne le sistematiche ProFile e Twi…

PhysicsMedicine(all)nickel-titanium cycling fatigue analysisSettore MED/28 - Malattie OdontostomatologicheGeneral DentistryHumanitiesGiornale Italiano di Endodonzia
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