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Hilloulin, B. (author), Grondin, F. (author), Matallah, M. (author), Loukili, A. (author)Cracks, caused by shrinkage or external loading, reduce the durability of concrete structures as aggressive substances can easily enter in the capillary network of the cementitious matrix. Natural autogenous healing ability of concrete by further hydration or precipitation has been studied experimentally for many years. Autogenous healing of...conference paper 2013
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Molodova, M. (author)This thesis discusses a new method for detection of short track irregularities, particularly squats, with axle box acceleration (ABA) measurements. A squat is a surface initiated short track defect, associated with high frequency vibrations of the wheel-rail system. High stresses in the contact patch at squats cause accumulation of plastic...doctoral thesis 2013
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Radtke, F.K.F. (author)Failure patterns and mechanical behaviour of high performance fibre-reinforced cementitious composites depend to a large extent on the distribution of fibres within a specimen. A discrete treatment of fibres enables us to study the influence of various fibre distributions on the mechanical properties of the material. The numerical analysis of...doctoral thesis 2012
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Caggiano, A. (author), Pepe, M. (author), Koenders, E.A.B. (author), Martinelli, E. (author), Etse, G.J. (author)Heat production induced by the hydration reaction and the resulting temperature evolution in the early phases of setting and hardening processes are critical phenomena, often leading to premature cracking of concrete members. However, the interest for simulating such phenomena is also related to the fundamental relationships between the nature...conference paper 2012
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Kumar, S.S. (author), Anupam, K. (author), Scarpas, A. (author), Kasbergen, C. (author)Hydroplaning speed is known to vary over a range of tire slipping conditions from free rolling to completely skidding. An attempt has been made to simulate two extreme conditions of hydroplaning i.e. when the tire is completely rolling (0% slip) and a completely locked tire (100% slip). ASTM standard smooth tire moving over the plane pavement...journal article 2012
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- Sandhaas, C. (author), Van de Kuilen, J.W. (author), Blass, H.J. (author) conference paper 2012
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Wiebenga, J.H. (author), Van den Boorgaard, A.H. (author), Klaseboer, G. (author)The coupling of finite element simulations to mathematical optimization techniques has contributed significantly to product improvements and cost reductions in the metal forming industries. The next challenge is to bridge the gap between deterministic optimization techniques and the industrial need for robustness. This paper introduces a...journal article 2012
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Labeur, R.J. (author), Wells, G.N. (author)A hybrid method for the incompressible Navier–Stokes equations is presented. The ethod inherits the attractive stabilizing mechanism of upwinded discontinuous Galerkin methods hen momentum advection becomes significant, equal-order interpolations can be used for the velocity nd pressure fields, and mass can be conserved locally. Using continuous...journal article 2012
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Nguyen, V.P. (author)The conventional multiscale homogenization theory, which has mainly been applied to determine constitutive laws for bulk materials, suffers from two drawbacks when applied to softening materials. Firstly, the coarse scale response is sensitive to the finite element mesh used to discretize the coarse scale domain. Secondly, increasing the size of...doctoral thesis 2011
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Van der Meer, F.P. (author)There is no state of the art computational model that is good enough for predictive simulation of the complete failure process in laminates. Already on the single ply level controversy exists. Much work has been done in recent years in the development of continuum models, but these fail to predict the correct failure mechanism in cases where...doctoral thesis 2010
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De Boer, A. (author)Introduction (chapter 1) In analysis software models the infrastructural constructions are often reduced to geometrical linear and surface models (plane stress and shell models). The selection of a model much depends on the speed of the analysis process and the total processing time. The increased computer power has boosted the visualisation of...doctoral thesis 2010
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Guo, Z. (author), Sluys, L.J. (author)The simulation of rubber-like material behaviour by means of the finite element method has been described in this study. Proper material models were selected for the numerical description of static hyper-elasticity. The combinations of a continuum damage mechanics concept and a pseudo-elastic concept with Gao's elastic law were used to simulate...journal article 2008
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- Tjahjanto, D.D. (author) doctoral thesis 2008
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Andreykiv, A. (author), Van Keulen, F. (author), Prendergast, P.J. (author)Modelling the course of healing of a long bone subjected to loading has been the subject of several investigations. These have succeeded in predicting the differentiation of tissues in the callus in response to a static mechanical load and the diffusion of biological factors. In this paper an approach is presented which includes both...journal article 2007
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Van der Zee, K.G. (author), Van Brummelen, E.H. (author), De Borst, R. (author)Coercivity of the bilinear form in a continuum variational problem is a fundamental property for finite-element discretizations: By the classical Lax–Milgram theorem, any conforming discretization of a coercive variational problem is stable; i.e., discrete approximations are well-posed and possess unique solutions, irrespective of the specifics...journal article 2006
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Guo, Z. (author)The simulation of rubber-like material behaviour by means of the finite element method has been described in this study. Proper material models for the numerical description of static hyper-elasticity, the ideal Mullins effect and the Mullins effect with permanent deformation were proposed, respectively. The second focus of this study was the...doctoral thesis 2006
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Pannachet, T. (author)Accuracy of a finite element solution depends greatly on the spatial discretisation of the problem domain. The more refined/enriched discretisation provides better accuracy but also requires more computational cost. For modelling of quasi-brittle failure, the process zone where failure takes place can be very small, thus it is very cost...doctoral thesis 2006
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Malidi, A. (author), Harlen, O. (author)We present a novel Lagrangian finite element method for simulating suspensions of particles in viscoelastic fluids. We solve the flow in a unit cell containing a small number of particles with doubly periodic boundary conditions on a self-replicating two-dimensional lattice to replicate a suspension on an infinite domain. The method uses a...conference paper 2006
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Svacek, P. (author), Horacek, J. (author)The paper focus on numerical approximation of the coupled of fluid and structural models in aeroelastic simulations as well as to the coupling of both models. The fluid motion is described by the incompressible Reynolds Averaged Navier-Stokes equations (RANS) and coupled with Spallart-Almaras turbulence model. The numerical solution by finite...conference paper 2006
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Stiemer, M. (author), Unger, J. (author), Svendsen, B. (author), Blum, H. (author)Electromagnetic metal forming is a contact-free high-speed forming process. The deformation of the workpiece is driven by a material body force, the Lorentz force, that results from the interaction of a pulsed magnetic field with eddy currents induced in the workpiece by the magnetic field itself. The purpose of this work is to present a fully...conference paper 2006