Searched for: subject%3A%22Finite%255C%2Belement%255C%2Bmethod%22
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Fayezioghani, A. (author), Dekker, R. (author), Sluys, L.J. (author)
Structural components in corrosive environments such as pipelines, bridges, aircrafts, and turbines are imposed to stress corrosion. A stress corrosion model for pit growth should a) accurately consider the electrochemistry of the corrosion process, b) properly deal with the moving interface between solid and electrolyte, and c) effectively...
article 2022
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Zhang, J. (author), Zhebel, E. (author), van den Boom, S.J. (author), Liu, D. (author), Aragon, A.M. (author)
In this work, an object-oriented geometric engine is proposed to solve problems with discontinuities, for instance, material interfaces and cracks, by means of unfitted, immersed, or enriched finite element methods (FEMs). Both explicit and implicit representations, such as geometric entities and level sets, are intro duced to describe...
article 2022
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Simons, E.C. (author), Weerheijm, J. (author), Toussaint, G. (author), Sluys, L.J. (author)
In this study, the impact of a steel spherical projectile on an alumina ceramic is considered. New experimental and numerical results are presented and analysed. Numerical results are obtained using the Finite Element Method and the upgraded viscosity regularized Johnson-Holmquist-2 constitutive model to describe the ceramic material behaviour....
article 2020
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Tajdari, F. (author), Berkhoff, A.P. (author), de Boer, A. (author)
This paper studies an acoustic source with a relatively small thickness and a high bending stiffness. The acoustic source operates in the low frequency, quasi-static regime. The focus of the current study is on the actuation part in order to design an appropriate excitation mechanism. A flexural mechanism is modeled in combination with a...
article 2020
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de Boer, J.G.G.M. (author), Hofmeyer, H. (author), Maljaars, J. (author), van Herpen, R.A.P. (author)
A self-supporting sandwich panel facade system under fire is studied. First, a thermomechanical FE model, which comprises the complete facade system, and incorporates material degradation and geometrical nonlinear behaviour except for the insulation material and connections, is loaded by a fire temperature curve. Eurocode design rules then...
article 2019
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Peet, B.J.A. (author)
conference paper 2019
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Talib, I. (author), Bronkhorst, A.J. (author), Pruiksma, J.P. (author), Suiker, A. (author)
Damping is an important parameter in the calculation of vibrations in high-rise buildings. This research presents a verification study of the Energy Flow Analysis as identification tool for damping in high rise buildings. The study investigates the magnitude of the error that can be expected with some of the assumptions and simplifications made...
conference paper 2019
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Bosschaart, C. (author), Jansen, H.W. (author), de Jong, C.A.F. (author), Basten, T. (author)
A concept for underwater machinery noise mitigation of future civil and military ships is the application of a common deck structure, supporting multiple machines, which is installed on resilient mounts on the ship's foundation structure. TNO is addressing the availability and testing of tools to be able to set realistic targets for the radiated...
conference paper 2017
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van der Aa, P. (author), Manie, J. (author)
Finite element analysis (FEA) can be used to design structures. Methods for linear and nonlinear FEA are applied to all kinds of geometries. A simplified geometry structure, or basic element type, sometimes does take into account all the necessary effects for the design purposes. In other analyses more advanced modelling is absolutely necessary....
conference paper 2017
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Tyler-Street, M. (author)
Structural design methods for naval ships include environmental, operational and military load cases. One of the operational loads acting on a typical naval vessel is the muzzle blast from a gun. Simulating the muzzle blast load acting on a ship structure with CFD and ALE methods leads to large numerical models with high CPU requirements as a...
conference paper 2014
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Gupta, D.K. (author), Langelaar, M. (author), Barink, M. (author), van Keulen, F. (author)
Optimal front electrode design is one of the approaches to improve the performance of solar cells. This work introduces the application of topology optimization (TO) to design complex front metallization patterns for solar cells. TO optimizes the distribution of electrode material on the front surface of the solar cell, such that its power...
conference paper 2014
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Nijhof, M.J.J. (author), Binnerts, B. (author), de Jong, C.A.F. (author), Ainslie, M.A. (author)
Modelling the sound levels in the water column due to pile driving operations nearby and out to large distances from the pile is crucial in assessing the likely impact on marine life. Standard numerical techniques for modelling the sound radiation from mechanical structures such as the finite element (FE) and boundary element method are not well...
conference paper 2014
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Borsje, H. (author), Renier, B. (author), Burggraaf, H.G. (author)
In the summer of 2011 the Dutch football club FC Twente was building an extension of their stadium De Grolsch Veste, to increase the capacity of the stadium. On July 7th 2011, during construction, the roof of the partially finished extension collapsed. As a result of this accident two workers were killed and nine were injured, a few of them...
conference paper 2014
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Walters, C.L. (author), Voormeeren, L.O. (author)
conference paper 2014
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Verreault, J. (author)
The Penetrator with Enhanced Lateral Effect (PELE) is a type of explosive-free projectile that undergoes radial fragmentation upon an impact with a target plate. This type of projectile is composed of a brittle cylindrical shell (the jacket) filled in its core with a material characterized with a large Poisson's ratio. Upon an impact with a...
conference paper 2014
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Ožbolt, J. (author), Weerheijm, J. (author), Sharma, A. (author)
The behavior of concrete structures is strongly influenced by the loading rate. Compared to quasi-static loading, on meso and macro-scale concrete loaded by impact loading acts in a different way. First, there is a strain-rate influence on strength, stiffness, ductility, and, second, there are inertia forces activated which influence the...
conference paper 2013
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Damoni, C. (author), Belletti, B. (author), Lilliu, G. (author)
In this paper the behavior of a squat shear wall subjected to monotonic shear loading is investigated. The study fits into the experimental program driven by CEOS.fr on modeling of the behavior of the tested mocks-ups (monotonic and cycling loading-under prevented or free shrinkage). The shear wall has been analyzed with nonlinear finite element...
conference paper 2013
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Maljaars, J. (author), Gration, D. (author), Vonk, E. (author), van Dooren, F. (author)
Orthotropic deck structures are used in many steel bridges. Due to the typical detailing applied as around 1970, a significant number of deck structures constructed in that period suffer from fatigue damage. In many countries cracks have been detected, in particular in the weld between the deck plate and the trapezoidal stiffener. These cracks...
conference paper 2013
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Kalkman, I.M. (author), Lentzen, S.S.K. (author), Courage, W.M.G. (author), Napoles, O.M. (author), Galanti, F.M.B. (author)
In general the condition of a structure can be assessed in terms of a performance indicator. For example, this can be the strength of a structure. An asset manager is concerned with ensuring that the performance of a structure does not fall below a given minimum level. This can be achieved by inspecting or monitoring the structure. As the...
conference paper 2011
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Rahman, T. (author), Jansen, E.L. (author), Tiso, P. (author)
In this paper, a finite element-based approach for nonlinear vibration analysis of shell structures is presented. The approach makes use of a perturbation method that gives an approximation for the amplitude-frequency relation of the structure. The method is formulated using a functional notation and is subsequently converted to a finite element...
article 2011
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