Treatment of constraints — contact and tied interfaces

Zienkiewicz, O.C.; Taylor, Robert L.; Fox, David

doi:10.1016/b978-075066431-8.50194-6

Cited by 3 publications

(1 citation statement)

References 57 publications

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“…The storage vessel was modelled using 2D computational fluid dynamics (CFD) simulations based on the finite elements method [28] and performed with the commercial COMSOL code [29]. The model included heat and mass transfer, pressure drop as well as absorption and desorption reactions.…”

Section: Finite Elements Modelling and Storage System Testingmentioning

confidence: 99%

SSH2S: Hydrogen storage in complex hydrides for an auxiliary power unit based on high temperature proton exchange membrane fuel cells

Baricco

Bang

Fichtner

et al. 2017

Journal of Power Sources

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The main objective of the SSH2S (Fuel Cell Coupled Solid State Hydrogen Storage Tank) project was to develop a solid state hydrogen storage tank based on complex hydrides and to fully integrate it with a High Temperature Proton Exchange Membrane (HT-PEM) fuel cell stack. A mixed lithium amide/magnesium hydride system was used as the main storage material for the tank, due to its high gravimetric storage capacity and relatively low hydrogen desorption temperature. The mixed *Manuscript text (with figures and captions embedded) Click here to view linked References To be submitted to Journal of Power Sources lithium amide/magnesium hydride system was coupled with a standard intermetallic compound to take advantage of its capability to release hydrogen at ambient temperature and to ensure a fast start-up of the system. The hydrogen storage tank was designed to feed a 1 kW HT-PEM stack for 2 hours to be used for an Auxiliary Power Unit (APU). A full thermal integration was possible thanks to the high operation temperature of the fuel cell and to the relative low temperature (170 °C) for hydrogen release from the mixed lithium amide/magnesium hydride system.

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Section: Finite Elements Modelling and Storage System Testingmentioning

confidence: 99%

SSH2S: Hydrogen storage in complex hydrides for an auxiliary power unit based on high temperature proton exchange membrane fuel cells

Baricco

Bang

Fichtner

et al. 2017

Journal of Power Sources

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Finite element buckling analysis of laminated composite sandwich panels with transversely flexible core containing a face/core debond

Sayyidmousavi

Malekzadeh

Bougharara

2011

Journal of Composite Materials

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In this article, a new three-dimensional finite element modeling approach with less computing time and space is introduced to study the buckling behavior of sandwich panels, containing a face–core debond. The finite element model presented in this study relates the motion of the face sheets to the core through constraint equations utilizing the concept of slave and master nodes, thus representing a more realistic model of the sandwich panel. The composite face sheets are modeled with shell elements, and the core is modeled using the 3D structural solid elements capable of taking transverse flexibility into consideration. In order to model the debond, the constraints between the nodes of the face sheet and the core are removed and replaced with contact elements in the debonded region to avoid interpenetration. The model is validated through comparison with experimental results reported in the literature. The validated model is then used to study the effects of the size, shape, aspect ratio of the debond, as well as fiber orientation of the face sheets and the influence of core stiffness on the buckling load of the panel subject to different boundary conditions on the top and bottom face sheets of the panel.

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Finite element buckling analysis of laminated composite sandwich panels with transversely flexible core carrying attached elastic strip

Fard

Sayyidmousavi

Fawaz

2012

Jnl of Sandwich Structures & Materials

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In this article, a three-dimensional finite element model is proposed to study the effect of distributed attached mass with thickness and stiffness on the buckling instability of sandwich panels with transversely flexible cores. Unlike the previous works in the literature which have made use of unified displacement theories, the present model uses different types of finite elements to model the core and the face sheets. It utilizes shell elements for the face sheets and three-dimensional solid elements for the core which enables the model to account for the transverse flexibility of the structure. The motions of the face sheets and the core as well as the attached mass are related through defining constraint equations between the nodes of their respective finite elements based on the concept of master and slave nodes which is incorporated into the finite element analysis program ANSYS through a user-defined subroutine. The validated finite element model is then used to study the effects of size, thickness, material property, aspect ratio, and the position of the attached mass on the buckling load of a sandwich panel under different combinations of boundary conditions. The results presented in this study have hitherto not been reported in the literature.

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Treatment of constraints — contact and tied interfaces

Cited by 3 publications

References 57 publications

SSH2S: Hydrogen storage in complex hydrides for an auxiliary power unit based on high temperature proton exchange membrane fuel cells

SSH2S: Hydrogen storage in complex hydrides for an auxiliary power unit based on high temperature proton exchange membrane fuel cells

Finite element buckling analysis of laminated composite sandwich panels with transversely flexible core containing a face/core debond

Finite element buckling analysis of laminated composite sandwich panels with transversely flexible core carrying attached elastic strip

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