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Blad, Thijs (author)Miniaturized vibration energy harvesters can provide an alternative to batteries in powering the billions of low power devices we use today by extracting power from ambient motion. Especially for implanted medical devices, these alternative power sources may be an attractive option to overcome the limitations on longevity and the replacement...doctoral thesis 2021
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Oude Vrielink, Thijs (author)There are strict tolerances on the placement of optical components in high performance optical systems. Compliant alignment mechanisms can be used to meet these tolerances. Conventional manufacturing techniques, such as milling and spark erosion, have been used to produce an extensive library of alignment solutions but are limited in the...master thesis 2021
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Meinders, Naut (author)There is a constant drive to make the next generation machines in the semiconductor industry more precise and faster. For this machines with a high repeatability, good dynamics and long lifetime are needed. Compliant mechanisms are suitable candidates to be used in this kind of machines because they can be manufactured monolithically, don’t wear...master thesis 2021
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Hoevenaars, Jasper (author)Density-based topology optimization, when used to design structures that show geometrical non-linear behaviour, currently faces computational effort and stability issues. These issues are caused by the iterative method used in geometric non-linear structural analysis. On top of taking much computational effort to complete, this method encounters...master thesis 2021
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Miedema, Rein (author)In laparoscopic surgery, surgeons may cause damage to internal tissues due excessive pinch forces while using laparoscopic forceps graspers. Low mechanical efficiency, poor haptic feedback and visual perception errors causes surgeons to be unable to correctly asses pinch forces. In this study, a new force limiting device is designed according to...master thesis 2021
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Solergibert I Travé, Oriol (author)Inspired by the dolphin skin, compliant coatings have been researched as a passive flow control solution to reduce drag. Both successful and drag-increasing experiments can be found in the literature. However, the mechanism is not well understood neither the combination of surface properties and flow conditions that yield a drag reduction. At...master thesis 2021
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Mak, Robin (author)People in healthcare, warehousing, and the agriculture sector all have one thing in common. They require labour which can be demanding on the human body, this could lead to problems in the long term. A way to alleviate these problems is to use a passive exoskeleton. While passive exoskeletons can have a variety of different use cases and types...master thesis 2021
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Gerlach, Robyn (author)This report proposes a concept for an I-profile curved beam compliant transmission system. The application of this system can be as a hip connection within a passive exoskeleton in which it transfers the walking motion from one leg to another. To obtain the desired behavior the torsion stiffness is reduced and the amount of work needed to move...master thesis 2021
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Staats, Laurens (author)Lateral torsional buckling (LTB) of I-beams is an established buckling phenomenon in civil and structural engineering known for causing structural failures. However when a buckling instability is present the structure contains a form of negative stiffness. Due to the observed tendency of I-beams subject to LTB to twist about their longitudinal...master thesis 2021
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Huisman, Jeroen (author)A compliant mechanism (CM) is a special kind of mechanism which has seen an increase in use in various high-tech applications. A CM is a structure designed with the intention to deform: motion is achieved by deformation of flexible members of its body. CMs are designed by topology optimization (TO) algorithms, which use boundary conditions as an...master thesis 2021
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Kempen, Sander (author)This paper presents a manufacturing method for a zero-stiffness compliant mechanism to be used as a flexible head support. The manufactured design consists of two curved, thin-walled U-beams made of high strength steel. The beams are prestressed in opposite directions to obtain zero torsional stiffness so that rotation of the head is allowed....master thesis 2021
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Sonneveld, Dave (author)Compliant joints have significant advantages compared to rigid-body hinges due to a monolithic design and the absence of friction, which prevents effects like wear, backlash and stick-slip behaviour. However, the loading capability is often limited and the support stiffness generally decreases during rotation, caused by the use of solid leaf...master thesis 2021
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Kooiman, Hugo (author)This report describes the design of a wire rope based grasper for a tissue transport mechanism based on friction including means for operation. The previous transport mechanism design had no mechanism to transfer tissue into the lumen to be transported. To create the grasper, the wire ropes were plastically deformed to bend outward, creating the...master thesis 2021
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- Dekens, Jaap (author) master thesis 2021
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Lai, Yu-Jui (author)This research studies the fluid-structure interaction (FSI) of compliant surfaces in air flows, with an objective of finding possible turbulent viscous drag reduction. A compliant surface is a thin layer of viscoelastic material drawing inspiration from dolphin epidermis, which was thought to have drag-reducing capabilities by Gray (1936)....master thesis 2021
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Nijdam, Lisanne (author)In the ever developing world that we live in, machines perform their task faster, better, more precise, cheaper, etc. every year. The improvements in a lot of mechanisms are inspired by the natural behavior of animals and humans. While falling off a balance beam, the human instinct let an arm or leg accelerate in the opposite direction of the...master thesis 2021
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Numić, Armin (author)Bistable vibration energy harvesters are an interesting alternative to their linear counterparts. They allow for large amplitude oscillations between their stable equilibria, from which much energy can be generated. However, the stable equilibria are separated by a potential energy barrier that has to be overcome. Therefore, we cannot guarantee...master thesis 2021
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Minnaard, Jeffrey (author), Kleipool, Roeland P. (author), Baars, Wim (author), Dankelman, J. (author), Stufkens, Sjoerd (author), Horeman, T. (author)Aims: Resection of bone is performed in over 75% of all orthopaedic procedures and the electrically powered oscillating saw is commonly used to cut bone. Drawbacks are relatively large incisions and tissue damage due to overshooting often occur. Therefore, the goal of this study is to develop an improved bone-cutting system that has minimally...journal article 2021
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Hargrove, Brianne (author), Nastevska, Angela (author), Jovanova, J. (author), Frecker, Mary (author)With the shift from traditionally manufactured rigid-body mechanisms to lightweight compliant mechanisms (CMs) in additive manufacturing, researchers have become interested in modeling the behavior of CMs with high flexibility. Due to the large deformations that can be achieved, the use of CMs has expanded into applications such as energy...conference paper 2021
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Radaelli, G. (author)Mechanisms that consist of many elements and are potentially small sized, benefit from kinematic elementary units like revolute joints that are compliant and monolithic, and therefore could be produced without need for assembly. We present a novel concept of a compliant revolute joint that features low axis drift, high support stiffness and a...journal article 2021