Search results for " Fractional model"

showing 3 items of 3 documents

Bending test for capturing the fractional visco-elastic parameters: theoretical and experimental investigation on giant reeds

2014

In this paper attention is devoted on searching a proper model for characterizing the behavior of giant reeds. To aim at this, firstly, meticulous experimental tests have been performed in the Laboratory of structural materials of University of Palermo. Further, the novel aspect of this paper is that of using an advanced Euler-Bernoulli model to fit experimental data of bending tests. Such a model of continuum beam takes into account different constitutive laws of visco-elasticity, being real materials visco-elastic.

EngineeringStructural materialContinuum (measurement)business.industryExperimental dataStructural engineeringBendingViscoelasticityData modelingStress (mechanics)Settore ING-IND/22 - Scienza E Tecnologia Dei MaterialiExperimental test Euler-Bernoulli beam Fractional modelbusinessSettore ICAR/08 - Scienza Delle CostruzioniBeam (structure)
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Bending test for capturing the vivid behavior of giant reeds, returned through a proper fractional visco-elastic model

2015

Abstract This paper presents results of experimental investigations made to evaluate the vivid behavior of giant reed Arundo donax. In particular, attention was paid to the relationship between visco-elastic properties and moisture content, which is widely recognized as one of the key factor that influences the mechanical properties of all wood-based materials. To this aim, after a controlled drying treatment on samples of reed, stress relaxation tests in three point bending configuration were performed to evaluate the effects of moisture content on visco-elastic behavior of the giant reed. Further, the novel aspect of this paper is that of using an Euler–Bernoulli model embedded with an ad…

Materials scienceNatural materialsThree point flexural testConstitutive equationBendingMechanicsPhysics::Classical PhysicsViscoelasticitySettore ING-IND/22 - Scienza E Tecnologia Dei MaterialiMechanics of MaterialsStress relaxation Viscoelastic material Bilogical material Mechanical testing Fractional modelStress relaxationGeneral Materials ScienceComposite materialSettore ICAR/08 - Scienza Delle CostruzioniInstrumentationBeam (structure)
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Experimental validation of a fractional model for creep/recovery testing of asphalt mixtures

2012

Abstract Prediction of asphalt mixtures’ behavior during their service life is a challenge due to its complexity and sensitivity to environmental and loading conditions. It has been proved that, when subjected to loading conditions comparable with most pavement operating conditions, asphalt mixtures behave as linear visco-elastic (LVE) materials. Traditionally the LVE behavior of bituminous material is modeled via creep/recovery functions. In the past, several rheological models constituted by elastic and viscous elements arranged in series or in parallel (analogical models) have been proposed and specified for both bitumen and asphalt mixtures. The corresponding constitutive laws always in…

Materials sciencebusiness.industryBuilding and ConstructionStructural engineeringExponential typeExponential functionCreepRecovery testingRheologyAsphaltAsphalt Creep recovery testing Fractional model Experimental validationService lifeSettore ICAR/04 - Strade Ferrovie Ed AeroportiGeneral Materials ScienceSensitivity (control systems)businessCivil and Structural EngineeringConstruction and Building Materials
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