Searched for: subject:"Finite%5C-element%5C+method"
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Li, Z. (author)
Surface cracks are serious threats to the structural integrity of offshore metallic pipes. This dissertation proposes a protocol of composite reinforcement on surface cracked metallic pipes subjected to cyclic loads, aiming to decrease the crack growth rate and prolong the residual fatigue life. The main objective of this dissertation is to...
doctoral thesis 2021
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Liu, J. (author), Möller, M. (author), Schuttelaars, H.M. (author)
In finite element methods, the accuracy of the solution cannot increase indefinitely since the round-off error related to limited computer precision increases when the number of degrees of freedom (DoFs) is large enough. Because a priori information of the highest attainable accuracy is of great interest, we construct an innovative method to...
journal article 2021
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Goudarzi, M. (author), Dal Corso, F. (author), Bigoni, D. (author), Simone, A. (author)
A dispersion of stiff and thin (‘rigid line’) inclusions (RLIs) in a matrix material may result beneficial for stiffening in the elastic range, but might be detrimental to strength, as material instabilities may be triggered by inclusions when the matrix is brought to a viscoplastic-damaging state. This dual role of RLIs is investigated by...
journal article 2021
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van den Berg, Niels (author), Xin, H. (author), Veljkovic, M. (author)
Orthotropic steel decks (OSD's) are susceptible to fatigue failure due to cyclic loading. Often fatigue cracks are found in the joint between the deck plate and the trough. Due to the welding process, residual stresses are present in and around the joint. In this paper, the effect of residual stresses on the fatigue crack propagation rate has...
journal article 2021
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Anderson, Robert (author), Andrej, Julian (author), Barker, Andrew (author), Bramwell, Jamie (author), Camier, Jean Sylvain (author), Cerveny, Jakub (author), Dobrev, Veselin (author), Dudouit, Yohann (author), Akkerman, I. (author)
MFEM is an open-source, lightweight, flexible and scalable C++ library for modular finite element methods that features arbitrary high-order finite element meshes and spaces, support for a wide variety of discretization approaches and emphasis on usability, portability, and high-performance computing efficiency. MFEM's goal is to provide...
journal article 2021
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Xin, H. (author), Correia, José A.F.O. (author), Veljkovic, M. (author)
The assessment of fatigue crack propagation of steel structures is essential and important especially to improve the application of high strength steel in construction. The load ratio R, reflecting mean stress effects, will be changed with crack extension in the steel structures with complicated geometry. In this paper, the Walker equation is...
journal article 2021
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Yoon, Juhee (author), Kwon, Min Hee (author), Shin, D. (author), Lee, Sang Wook (author)
Mechanical resonance properties of porous graphene resonators were investigated by simulation studies. The finite element method was utilized to design the porous graphene membrane pattern and to calculate the mechanical resonance frequency and quality factor. The changes in the resonance frequency and quality factor were systematically...
journal article 2021
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Hedayati, R. (author), Ghavidelnia, Naeim (author), Sadighi, Mojtaba (author), Bodaghi, Mahdi (author)
Permeable porous implants must satisfy several physical and biological requirements in order to be promising materials for orthopaedic application: they should have the proper levels of stiffness, permeability, and fatigue resistance approximately matching the corresponding levels in bone tissues. This can be achieved using designer materials...
journal article 2021
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Kadeethum, T. (author), Lee, S. (author), Ballarin, F. (author), Choo, J. (author), Nick, H.M. (author)
This paper presents a mixed finite element framework for coupled hydro-mechanical–chemical processes in heterogeneous porous media. The framework combines two types of locally conservative discretization schemes: (1) an enriched Galerkin method for reactive flow, and (2) a three-field mixed finite element method for coupled fluid flow and...
journal article 2021
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Naeimi, M. (author)
Rolling contact fatigue (RCF) is an important form of damage in wheels and rails that typically has surface and subsurface cracks. Squats are one of the major RCF defects that occur in the running band of rails and can create high dynamic forces and cause rail fracture if they are not detected and treated in time. In the current research, three...
doctoral thesis 2020
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Lepillier, B.P. (author)
In 2020, as the world Energy demand keeps on rising (International Energy Agency (IEA), 2019), and with the global climate warming a reality (The Organisation for Economic Co-operation and Development (OECD), 2020), reducing our societal impact on Earth is of utmost importance. Energy and Climate have always been intrinsically related. Therefore...
doctoral thesis 2020
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Tiberga, M. (author)
The Molten Salt Reactor (MSR) is one of the six Generation-IV nuclear reactor designs. It presents very promising characteristics in terms of safety, sustainability, reliability, and proliferation resistance. Numerous research projects are currently carried out worldwide to bring this future reactor technology to a higher maturity, and in Europe...
doctoral thesis 2020
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He, Xin (author), Vuik, Cornelis (author)
This paper introduces three new Schur complement approximations for the augmented Lagrangian preconditioner. The incompressible Navier-Stokes equations discretized by a stabilized finite element method are utilized to evaluate these new approximations of the Schur complement. A wide range of numerical experiments in the laminar context...
journal article 2020
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Krishnan, Navaneetha (author), Viré, A.C. (author), Schmehl, R. (author), van Bussel, G.J.W. (author)
A novel immersed boundary method based on a domain decomposition approach is proposed in the context of a finite element discretisation method. It is applicable to incompressible flows past rigid, deforming, or moving bodies. In this method, unlike most immersed boundary methods, strong boundary conditions are imposed in the regions of the...
journal article 2020
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Simons, E.C. (author)
Armour systems for ballistic protection can be made from many materials. One type of material used in armour systems is ceramic. Ceramic materials, such as alumina and silicon carbide, can be beneficial in an armour system because of their high hardness and relatively low weight. The high hardness of the ceramic potentially causes a projectile...
doctoral thesis 2020
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Du, Shuoran (author), Hamdi, M. (author), Sue, Hung Jue (author)
Mar is a type of subtle surface damage caused by a sliding object barely visible to human eyes. This minor damage phenomenon has rarely been systematically studied. Significant research efforts for the fundamental understanding of mar behavior in polymers are still needed. In this study, the mar behavior of a series of model amorphous...
journal article 2020
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Sinha, Kautuk (author), Singh, Niels K. (author), Abdalla, Mostafa M. (author), De Breuker, R. (author), Alijani, F. (author)
The article proposes a method developed for model order reduction in a Finite Element (FE) framework that is capable of computing higher order stiffness tensors. In the method, a truncated third order asymptotic expansion is used for transformation of an FE model to a reduced system. The basis matrix in the formulation of the reduced-order...
journal article 2020
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Aragon, A.M. (author), Liang, Bowen (author), Ahmadian, Hossein (author), Soghrati, Soheil (author)
The Hierarchical Interface-enriched Finite Element Method (HIFEM) is a technique for solving problems containing discontinuities in the field gradient using finite element meshes that do not conform (match) the domain morphology. The method is suitable for analyzing problems with complex geometries or when such geometry is not known a priori....
journal article 2020
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Kadeethum, T. (author), Nick, H.M. (author), Lee, S. (author), Ballarin, F. (author)
This paper presents the enriched Galerkin discretization for modeling fluid flow in fractured porous media using the mixed-dimensional approach. The proposed method has been tested against published benchmarks. Since fracture and porous media discontinuities can significantly influence single- and multi-phase fluid flow, the heterogeneous and...
journal article 2020
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Peng, Q. (author), Vermolen, F.J. (author)
Deep tissue injury is often followed by contraction of the scar tissue. This contraction occurs as a result of pulling forces that are exerted by fibroblasts (skin cells). We consider a cell-based approach to simulate the contraction behavior of the skin. Since the cells are much smaller than the wound region, we model cellular forces by...
conference paper 2020
Searched for: subject:"Finite%5C-element%5C+method"
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