A predictive tool to evaluate braking system performance using a fully coupled thermo-mechanical finite element model

This paper proposes a fully coupled three-scale finite element model for the mechanical description of an alumina/magnesium alloy/epoxy composite inspired in the mechanics and architecture of wood cellulose fibres. The constitutive response of the composite (the large scale continuum) is described by means of a representative volume element (RVE, corresponding to the intermediate scale) in which the fibre is represented as a periodic alternation of alumina and magnesium alloy fractions. Furthermore, at a lower scale the overall constitutive behavior of the alumina/magnesium alloy fibre is modelled as a single material defined by a large number of RVEs (the smallest material scale) at the Gauss point (intermediate) level. Numerical material tests show that the choice of the volume fraction of alumina based on those volume fractions of crystalline cellulose found in wood cells results in a maximisation of toughness in the present bio-inspired composite.

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A fully coupled thermo-viscoelastic finite element model for self-folding shape memory polymer sheets

Journal of Polymer Science Part B Polymer Physics ◽

10.1002/polb.24372 ◽

2017 ◽

Vol 55 (16) ◽

pp. 1207-1219 ◽

Cited By ~ 12

Author(s):

Russell W. Mailen ◽

Michael D. Dickey ◽

Jan Genzer ◽

Mohammed A. Zikry

Keyword(s):

Finite Element ◽

Finite Element Model ◽

Shape Memory ◽

Shape Memory Polymer ◽

Element Model ◽

Polymer Sheets ◽

Fully Coupled

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Modeling Leakage With Mica-Based Compressive Seals for Solid Oxide Fuel Cells

Tribology ◽

10.1115/imece2006-15264 ◽

2006 ◽

Cited By ~ 1

Author(s):

Christopher K. Green ◽

Jeffrey L. Streator ◽

Comas Haynes

Keyword(s):

Finite Element ◽

Fuel Cells ◽

Finite Element Model ◽

Solid Oxide Fuel Cells ◽

Element Model ◽

High Energy ◽

Solid Oxide ◽

Physical Parameters ◽

Oxide Fuel ◽

Predictive Tool

Fuel cells represent a promising energy alternative to the traditional combustion of fossil fuels. In particular, solid oxide fuel cells (SOFCs) have been of interest due to their high energy densities and potential for stationary power applications. One of the key obstacles precluding the maturation and commercialization of planar SOFCs has been the lack of a robust sealant. This paper presents a computational model of leakage with the utilization of mica-based compressive seals. A finite element model is developed to ascertain the macroscopic stresses and deformations in the interface. In conjunction with the finite element model is a microscale contact mechanics model that accounts for the role of surface roughness in determining the mean interfacial gap at the interface. An averaged Reynolds equation derived from mixed lubrication theory is applied to model the leakage flow across the rough, annular interface. The composite model is applied as a predictive tool for assessing how certain physical parameters (i.e., seal material composition, compressive applied stress, surface finish, and interfacial conformity) affect seal leakage rates.

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Fully coupled finite element model for dynamics of partially saturated soils

Soil Dynamics and Earthquake Engineering ◽

10.1016/j.soildyn.2009.03.002 ◽

2009 ◽

Vol 29 (9) ◽

pp. 1294-1304 ◽

Cited By ~ 14

Author(s):

Nadarajah Ravichandran

Keyword(s):

Finite Element ◽

Finite Element Model ◽

Element Model ◽

Saturated Soils ◽

Partially Saturated ◽

Partially Saturated Soils ◽

Fully Coupled

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Thermo-piezo-elastic analysis of amplified piezoceramic actuators using a refined one-dimensional model

Journal of Intelligent Material Systems and Structures ◽

10.1177/1045389x17721026 ◽

2017 ◽

Vol 29 (17) ◽

pp. 3482-3494 ◽

Cited By ~ 1

Author(s):

Enrico Zappino ◽

Erasmo Carrera

Keyword(s):

Finite Element ◽

Finite Element Model ◽

Structural Model ◽

Element Model ◽

Elastic Analysis ◽

One Dimensional ◽

Piezoelectric Effects ◽

Carrera Unified Formulation ◽

Strain Stress ◽

Fully Coupled

The thermo-piezo-elastic analysis of amplified piezoceramic actuators is presented in this article. A refined one-dimensional multi-field finite element model, based on the Carrera Unified Formulation, has been developed. Thermal and piezoelectric effects have been included in the structural model and a fully coupled thermo-piezo-elastic analysis has been performed. The finite element model has been assessed by comparing it with results from open literature The model has also been used to perform the analysis of complex amplified piezoceramic actuators. These actuators are able to amplify the displacements produced by piezoceramic material, but they suffer from high deformations when they undergo high thermal loads. An accurate thermal analysis has been performed to evaluate the strain/stress field. The results show the accuracy of the present model and its capabilities in multi-field analyses.

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