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den Hollander, Daan (author)This thesis describes the development of an innovative product, The EcoModule. The innovation enhances a marine infrastructure called, Reef Enhancing Breakwater (REB), developed by the startup Reefy. This breakwater prevents coastal erosion and it provides a habitat substrate for marine organisms, with the aim of boosting biodiversity. The...master thesis 2023
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Hack, Roos (author)► Introduction & Client | Over the last decade, there has been a notable increase of interest in discussions surrounding animal welfare, driven by a deeper understanding of the mental states of animals. This growing awareness has triggered a global push to improve laws and regulations in animal welfare, prompting zoos worldwide to increase...master thesis 2023
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Zhang, Jujian (author)This thesis introduces the Discontinuity-Enriched Finite Element Method (DE-FEM) for the modeling of dynamic multiple crack growth problems including branching and merging, as an alternative to eXtended/Generalized Finite Element Method (X/GFEM). DE-FEM differs from X/GFEM by placing the enriched degrees of freedom (DOFs) directly along the...master thesis 2023
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Tallapragada, Bharadwaj (author)A popular class of methods for solving Fluid-Structure Interactions (FSI) problems computationally are the moving mesh deformation methods. These methods generally involve deforming the fluid domain so that it conforms to the structure as it undergoes changes. An efficient and robust moving mesh technique involves interpolation of displacements...master thesis 2023
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van Bergen, Steven (author)Nanophotonics is the study of structures’ interaction with light with features at or below the nanometer scale. It has gained the interest of many researchers, as it can be used to control the flow of light very effectively in the design of, e.g., solar cells, highly efficient biosensors or lasers. The design of such devices can be non-intuitive...master thesis 2022
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Vermeer, C.M. (author)Polyhydroxyalkanoates (PHA) are a family of biopolymers produced intracellular<br/>by a range of different bacteria.PHA have attracted widespread attention as<br/>an environmental friendly replacement of fossil-based polymers, because they<br/>have thermoplastic and/or elastomeric properties, and are also biobased and<br/>biodegradable.Moreover,...doctoral thesis 2022
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van Tatenhove, Rick (author)In this report a new enriched finite volume method is introduced. This method will be particularly useful for fluid-structure interaction problems. In engineering many problems are in the domain of fluidstructure interaction. Examples of these are water in sea locks, blood flowing in vessels and sailing ships. Fluid problems are usually solved...master thesis 2022
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van den Boom, S.J. (author)Phononic crystals can be designed to have bandgaps---ranges of frequencies whose propagation through the material is prevented. They are therefore attractive for vibration isolation applications in different industries, where unwanted vibrations reduce performance. Yet, important steps are still to be made for the integration of phononic...doctoral thesis 2022
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Cobben, Nicolle (author)The Netherlands is confronted with drought more and more frequently. Two of the four climate scenarios predict that summers will become drier and extreme weather such as drought will occur longer and more often. Drought is a serious problem for multiple reasons. First of all it concerns large areas. Secondly it can take long before the effects...master thesis 2022
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Zhang, J. (author)Cracks, which could nucleate and propagate in engineering structures, could have an adverse effect on mechanical performance and even lead to catastrophic failure. Thus, it is critical to investigate structural behavior under fracture, which requires an appropriate modeling methodology for fracture analysis. Furthermore, designing structures...doctoral thesis 2022
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Zhang, J. (author), van Keulen, A. (author), Aragon, A.M. (author)We propose a fully immersed topology optimization procedure to design structures with tailored fracture resistance under linear elastic fracture mechanics assumptions for brittle materials. We use a level set function discretized by radial basis functions to represent the topology and the Interface-enriched Generalized Finite Element Method ...journal article 2022
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Vermeer, C.M. (author), Bons, Larissa J. (author), Kleerebezem, R. (author)Abstract: Using microbial enrichment cultures for the production of waste-derived polyhydroxyalkanoates (PHAs) is a promising technology to recover secondary resources. Volatile fatty acids (VFAs) form the preferred substrate for PHA production. Isobutyrate is a VFA appearing in multiple waste valorization routes, such as anaerobic...journal article 2022
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Echeverri, Edwan Anderson Ariza (author), Nishikawa, A.S. (author), Masoumi, Mohammad (author), Pereira, Henrique Boschetti (author), Marulanda, Nelson Granda (author), Rossy, Andrés Márquez (author), Goldenstein, Hélio (author), Tschiptschin, André Paulo (author)A novel combined process of Cold Stamping (CS) and Hot Stamping (HS) with Quenching and Partitioning (Q&P) treatment applied to advanced TRIP-assisted steel has been conducted by thermomechanical simulation to evaluate the influence of CS or HS in the Q&P processing. With this purpose, Q&P, CSQ&P, and HSQ&P cycles were...journal article 2022
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Noel, L.F.P. (author), Schmidt, M. (author), Doble, K. (author), Evans, J. A. (author), Maute, K. (author)Multi-material problems often exhibit complex geometries along with physical responses presenting large spatial gradients or discontinuities. In these cases, providing high-quality body-fitted finite element analysis meshes and obtaining accurate solutions remain challenging. Immersed boundary techniques provide elegant solutions for such...journal article 2022
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Vermeer, C.M. (author), Depaz, Lena (author), van den Berg, Emily (author), Koelmans, Tom (author), Kleerebezem, R. (author)Medium-chain-length polyhydroxyalkanoate (mcl-PHA) production by using microbial enrichments is a promising but largely unexplored approach to obtain elastomeric biomaterials from secondary resources. In this study, several enrichment strategies were tested to select a community with a high mcl-PHA storage capacity when feeding octanoate. On...journal article 2022
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Zhang, J. (author), Zhebel, E.V. (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 introduced to describe...journal article 2022
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Liu, D. (author), van den Boom, S.J. (author), Simone, A. (author), Aragon, A.M. (author)We propose an enriched finite element formulation to address the computational modeling of contact problems and the coupling of non-conforming discretizations in the small deformation setting. The displacement field is augmented by enriched terms that are associated with generalized degrees of freedom collocated along non-conforming...journal article 2022
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Zhang, J. (author), Aragon, A.M. (author)Stress analysis is an all-pervasive practice in engineering design. With displacement-based finite element analysis, directly-calculated stress fields are obtained in a post-processing step by computing the gradient of the displacement field—therefore less accurate. In enriched finite element analysis (EFEA), which provides unprecedented...journal article 2022
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Stouten, G.R. (author)Quickly, the show is about the start. Date: 3.5 thousand million years ago, location: planet Earth, event: life. Naturally, life is starting small, even microscopically tiny. Life in the form of microorganisms endures eons of time in which the world changes. They survived, failed, adapted, thrived, and they actually changed the world. They have...doctoral thesis 2021
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Yan, Yuheng (author)The computational modeling of crack propagation is important in aerospace and automotive industries because cracks play a significant role in structural failure. In comparison with the quasi-static case, inertial effects are significant in dynamic crack propagation. The classical numerical tool for modeling dynamic crack propagation is the...master thesis 2021