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Steinfort, Ruben (author)The building industry's emphasis on cost-driven standardization has led to more waste, prompting a need for resource-efficient methods. While coreless-filament winding (CFW) with materials like flax fibers show promise, a research gap is present. This study explores how computational design, coupled with coreless-filament winding, can create...master thesis 2024
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Mulder, Duco (author)Tailored Universal Feedstock for Forming (TuFF) is a highly aligned discontinuous fiber (ADF) composite, developed to create composite laminates with metal-like formability. This material has shown fiber directional stretch while retaining fiber volume fractions up to 57%, demonstrating the ability to create complex geometry components....master thesis 2024
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van der Lingen, Kevin (author)The emergence of innovative construction materials is dawning a new era of ambition within the civil engineering community. Among these innovative materials, Basalt Fibre Reinforced Polymer (BFRP) has recently surfaced with promising potential as a reinforcing material in concrete. Currently, in the Dutch concrete construction industry, the...master thesis 2024
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Westerveld, Timo (author)The effect of creating parallel welds in a single overlap using continuous ultrasonic welding on the weld quality has been investigated, with the goal of creating three high-quality parallel welds. To achieve this, multiple aspects were examined to understand the creation of high-quality parallel welds. The weld quality is highly influenced by a...master thesis 2024
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Zygouris, Ioannis (author)Transparent Natural Fiber Composite Materials may pose a more environmentally friendly alternative regarding energy efficiency and low CO2 emissions in contrast to traditional composites, exhibiting transparency for future smart building or photovoltaic applications. The present study involved a research effort for the development of a...master thesis 2024
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Czél, László (author)The thesis aimed to characterize the effects of manufacturing-induced defects, particularly gaps in variable stiffness laminates. The primary focus centered on designing a specimen capable of accurately characterizing gap effects. A refined, element-level specimen design featuring a controlled gauge zone was developed, based on pre-defined...master thesis 2024
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Kooreman, Duco (author)Ultra-High Performance Fiber Reinforced Concrete (UHPFRC) is a promising material for different applications such as bridge deck strengthening due to its improved strength and durability properties. Especially the tensile strength and ductility is heavily dependent on the distribution and orientation of the steel fibers within the element. This...master thesis 2024
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Duplay, Emmanuel (author)A laser-sustained plasma (LSP) generator capable of operating as a laser-thermal thruster was designed and tested. The apparatus was powered by a 3-kW 1070-nm fiber-optic laser and was operated with argon gas. The laser absorption, radiated spectrum, and change in static pressure were recorded, and high-speed video footage of the LSP was...master thesis 2024
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Losch, M.S. (author), Heintz, J.D. (author), Edström, Erik (author), Terander, Adrian Elmi (author), Dankelman, J. (author), Hendriks, B.H.W. (author)Diffuse Reflectance Spectroscopy (DRS) can provide tissue feedback for pedicle screw placement in spine surgery, yet the integration of fiber optics into the tip of the pedicle probe, a device used to pierce through bone, is challenging, since the optical probing depth and signal-to-noise ratio (SNR) are affected negatively compared to those of...journal article 2024
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Fang, G. (author), Zhang, Tianyu (author), Huang, Yuming (author), Zhang, Zhizhou (author), Masania, K. (author), Wang, C.C. (author)This work explores a spatial printing method to fabricate continuous fiber-reinforced thermoplastic composites (CFRTPCs), which can achieve exceptional mechanical performance. For models giving complex 3D stress distribution under loads, typical planar-layer based fiber placement usually fails to provide sufficient reinforcement due to their...journal article 2024
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Werlen, Vincent (author), Rytka, Christian (author), Dransfeld, C.A. (author), Brauner, Christian (author), Michaud, Véronique (author)Modeling the consolidation of fiber-reinforced thermoplastic composites at the part level presents a formidable computational challenge due to the multi-scale nature of the process. In this article, a method to bypass the multi-scale problem by homogenizing the micro scale and describing the medium with characteristic parameters is described....journal article 2024
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auf der Heiden, F.K. (author), Münzer, Oliver (author), Van Staalduine, Simon (author), Amunts, Katrin (author), Axer, Markus (author), Menzel, Miriam (author)We propose the application of Compressed Sensing to Computational Scattered Light Imaging to decrease measurement time and data storage. Computational Scattered Light Imaging (ComSLI) determines three-dimensional fiber orientations and crossings in biomedical tissues like brain tissue. Currently, conventional ComSLI is time-consuming and...conference paper 2024
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Nedelcu, Alex (author), Mendes Florindo, A.M. (author), Han, S.H. (author), Dekker, Jaap (author), de Vlieger, M.J. (author), Castro, Saullo G.P. (author), Peeters, D.M.J. (author)Double-curved composite structures that are manufactured via automated fiber placement, such as pressure vessels, can take advantage of tow steering to reduce weight. This design freedom comes with the cost of adding internal normal stresses to the tow, possibly leading to wrinkles or pull up. The present work investigates tow pull up both...journal article 2024
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Seeber, Franziska (author), Khaloian-Sarnaghi, Ani (author), Yu, Taoyi (author), Duddeck, Fabian (author), van de Kuilen, J.W.G. (author)This contribution aims for an enhanced numerical representation for strength prediction of timber. This implies a validated elasto-plastic continuum damage model which considers orthotropy and heterogeneity of the material, and represents the ductile behavior under compression and the brittle material behavior under tension dependent on the...journal article 2024
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Ophorst, M. (author), Grooth, Joris de (author), Heijman, Sebastiaan (author), Vaudevire, Elisabeth M.H. (author), Jafari, Morez (author)This study investigated the performance of direct hollow fiber nanofiltration (dNF40) membranes from NX Filtration BV on a pilot scale for the treatment of pre-treated IJsselmeer water from Waterwinstation Prinses Juliana (WPJ) in Andijk, as well as the direct treatment of raw IJsselmeer water. The objective was to evaluate the long-term...journal article 2024
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Adams, M.G.A. (author), Huijer, A.J. (author), Kassapoglou, C. (author), Vaders, Johannes A.A. (author), Pahlavan, Lotfollah (author)The multimodal and dispersive character of ultrasonic guided waves (UGW) offers the potential for non-destructive evaluation of fiber-reinforced composite (FRC) materials. In this study, a methodology for in situ stiffness assessment of FRCs using UGWs is introduced. The proposed methodology involves a comparison between measured wave speeds of...journal article 2024
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Ji, C. (author), Hu, Jiqiang (author), Alderliesten, R.C. (author), Yang, Jinchuan (author), Zhou, Zhengong (author), Sun, Yuguo (author), Wang, Bing (author)This paper aims to illustrate the effect of the impact damage on fatigue behavior of CF/PEEK-titanium hybrid laminates. To achieve this end, a fatigue life model was proposed to predict the S–N curves of the laminates at various initial impact energy levels and stress ratios based on the energy dissipation approach. The energy dissipation...journal article 2024
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Yao, L. (author), Chuai, Mingyue (author), Li, Hanyue (author), Chen, Xiangming (author), Quan, D. (author), Alderliesten, R.C. (author), Beyens, M. (author)Temperature can significantly affect fatigue delamination growth (FDG) behavior in composites, while fiber bridging has been frequently reported during FDG. The focus of this study was therefore on investigating temperature effects on FDG behavior with fiber bridging. Mode I fatigue delamination experiments were conducted on a thermoset...journal article 2024
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Losch, M.S. (author), Dankelman, J. (author), Hendriks, B.H.W. (author)Our research highlights the potential of Diffuse Reflectance Spectroscopy (DRS) in detecting cortical breaches during pedicle screw placement. We propose a sideways-looking fiber-optic probe, integrating diffuse light emission with both forward and sideways light collection. Experiments on an optical tissue phantom validate the probe’s...conference paper 2024
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Bajaj, V. (author), Van de Plas, Raf (author), Wahls, S. (author)While probabilistic constellation shaping (PCS) enables rate and reach adaption with finer granularity [1] (Cho and Winzer, 2009), it imposes signal processing challenges at the receiver. Since the distribution of PCS-quadrature amplitude modulation (QAM) signals tends to be Gaussian, conventional blind polarization demultiplexing algorithms...journal article 2024