{"title":"Mechanics And Adaptronics","description":null,"products":[{"product_id":"ultraviolet-light-curable-piezoelectric-multi-phase-composites-book-rytis-mitkus-9783031569456","title":"Ultraviolet Light Curable Piezoelectric Multi-phase Composites","description":"This book offers extensive knowledge and characterization methods for Ultraviolet light curable piezoelectric 0-3 composites for researchers and industry. The book provides extensive research on the use of carbon-based conductive nanoparticles to improve the performance of Ultraviolet light curable piezoelectric composites, forming piezoelectric 0-0-3 composites. Materials researched include Barium Titanate (BTO), Sodium Potassium Niobate (KNN), Graphene Nanoplatelets (GNP), Multi-Walled Carbon Nanotubes (MWCNT) and Graphene Oxide (GO). A comprehensive literature review on piezoelectric 0-3 composites focuses on the main influencing factors to achieve high piezoelectric composite performance. The method to characterize the performance of piezoelectric composites using 4-point bending is adopted from literature, is characterized, and adopted for performance measurements.","brand":"WoB","offers":[{"title":"GB \/ NEW \/ GARDNERS","offer_id":50329503826193,"sku":"NGR9783031569456","price":0.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/3031569458.jpg?v=1785984825"},{"product_id":"design-load-allowables-for-composite-plates-exposed-to-thermomechanical-loads-book-martin-liebisch-9783031713514","title":"Design Load Allowables for Composite Plates Exposed to Thermomechanical Loads","description":"Current methodologies used to design lightweight structures made of CFRP materials under static thermomechanical conditions often rely on simplified approaches. In particular, the temperature-related design case is typically described by assuming a uniform distribution of the worst-case temperature, which is the maximum allowable temperature that can occur simultaneously with the mechanical loads. However, these simplifications can lead to a weight penalty due to their over-conservatism. To address these limitations, the present work describes a novel analysis methodology that accounts for spatial distributions of temperature. This approach allows for a more detailed understanding of the structural behavior under these demanding conditions. As a result, existing load-carrying potentials can be identified and used to fully exploit the advantage of CFRP structures. Moreover, this methodology generates an improved understanding of the variability in the structural behavior under such scattering thermal conditions, which can increase confidence and reliability in the design process and lead to reduce related margins of safety. To accurately model the mechanical behavior of structures at distributed temperature conditions, it is essential to consider the temperature-dependent properties of the material. These properties describing the elastic and strength behavior of the unidirectional ply, are derived from typical material characterization performed at various temperatures. In this approach, a phenomenological model is used to account for the temperature dependence of the material. This model is fitted to the characterization results to consider the individual magnitude of the properties. The resulting property allowables contain typical material uncertainties, as well as the model uncertainty that is defined by assessing the errors between the model and measurement. To determine the stability and strength behavior of structures under different thermal conditions, Finite-Element-Analysis (FEA) is utilized. Variations of thermal load distributions are analyzed to consider the uncertainty in opertational conditions qualitatively and quantitatively. A series of such analyses is conducted at different thermal conditions to determine design values such as buckling loads or failure loads. Based on this data, surrogate modeling leads to design value formulation as a function of the temperature distribution. This approach provides a more comprehensive and reliable assessment of the structural behavior under different thermal conditions and enables to either determine more realistic worst-case behavior or enhanced design values such as probabilistic structural allowables. The final part of the thesis demonstrates the developed analysis methodology on representative skin field structures. The comparison to the common analysis procedure highlights the potentials of structural load carrying capability and reveals deficiencies in the present approach. Thus, a detailed modelling of the temperature distribution leads additionally to an improved reliability of the design process and more efficient and robust structures.","brand":"WoB","offers":[{"title":"- \/ - \/ -","offer_id":51060629078289,"sku":"","price":0.0,"currency_code":"GBP","in_stock":true},{"title":"US \/ NEW \/ INGRAM","offer_id":51060632224017,"sku":"NIN9783031713514","price":0.0,"currency_code":"GBP","in_stock":false},{"title":"GB \/ NEW \/ GARDNERS","offer_id":51717834932497,"sku":"NGR9783031713514","price":0.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/3031713516.jpg?v=1787747994"},{"product_id":"characterisation-of-the-mechanical-properties-of-heat-induced-protein-deposits-i-book-jintian-liu-9783031218484","title":"Characterisation of the Mechanical Properties of Heat-Induced Protein Deposits in Immersed Cleaning Systems","description":"\u003cp\u003eDuring heat treatment in dairy production, the rapid formation of heat-induced fouling deposits on the plant surface leads to reduced efficiency of heat transfer. Therefore, a regular cleaning process is required to soften the heat-induced protein deposits and then remove them from the plant surface. The mechanical property of the deposits is one of the key issues of the cleaning mechanisms since the non-fractured behaviour dominates the deformation of the fouling layer and the failure behaviour has a great impact on the cohesive removal of fouling deposits. Considering the complicated geometry of fouling deposits and their irregular distribution, indentation experiments were carried out on various kinds of protein deposits. The experimental results reveal the significant influence of the thickness of fouling deposits on their mechanical behaviour and the time-dependent nonlinear behaviour of the deposits.\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003cp\u003eFurthermore, heat-induced whey protein gel was used as the modelmaterial for fouling deposits and the non-fractured and fracture behaviour was characterized using compression and wire cutting experiments, respectively. The material parameters identified using the inverse finite element method allow the prediction of fracture behaviour under localized external loads and provide a deeper insight into cohesive removal. To investigate the softening effect during caustic washing, tensile experiments were conducted on chemically treated and untreated whey protein gels. Adequate chemical degradation leads to a softer mechanical response and increased stress relaxation, making whey protein gels more flowable and more resistant to tensile deformation. The experimental results provide useful data on the failure behaviour of chemically treated whey protein gels.\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e","brand":"WoB","offers":[{"title":"- \/ - \/ -","offer_id":51064690835729,"sku":"","price":0.0,"currency_code":"GBP","in_stock":true},{"title":"US \/ NEW \/ INGRAM","offer_id":51064693326097,"sku":"NIN9783031218484","price":0.0,"currency_code":"GBP","in_stock":false},{"title":"GB \/ NEW \/ INGRAM","offer_id":52674442232081,"sku":"NLS9783031218484","price":0.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/3031218485.jpg?v=1792002120"},{"product_id":"development-of-a-self-sufficient-wireless-sensor-node-using-the-outer-fml-layer-book-sarah-bornemann-9783031706479","title":"Development of a Self-Sufficient, Wireless Sensor Node Using the Outer FML Layer as an Antenna","description":"\u003cp\u003eThis book presents an investigation on integrating wireless sensor nodes including their antennas into fiber metal laminates (FMLs) for the purpose of enabling wireless, material-integrated structural health monitoring.\u003c\/p\u003e\n\n\u003cp\u003eWithin the scope of this work, a digital sensor node is presented, which can be fully integrated into a conductive host material. A stainless steel antenna supplies the system with sufficient power to provide the functions required for its intended use. This system enables the wireless readout of sensor data for the detection of damage in FMLs. The application focuses on aerospace components, for the detection of damage in the inner material layers, which are not or only hardly detectable by optical inspection methods. Guided ultrasonic waves in the form of Lamb waves are used for this. The flexible electronics are inserted into the layers of the target material, while the associated antenna is cut into the outer metal layer. This turns the outer metal layer, which would prevent wireless communication from inside the laminate, into an advantage, as the need for an additional, external antenna is eliminated. Two fundamentally different principles can be used as the sensor element. Piezoelectric sensors were already used extensively in structural health monitoring using ultrasound and recently developed piezoresistive sensors, which are designed to be very small, making them highly suitable for material integration. Both types of sensors can be read out with the presented system so that the most appropriate approach can be chosen depending on the application. The suitability of the wireless sensor system for its intended purpose is verified by material-integrated measurements. At the end of this work, it is shown that the raw data of the measurements reproducibly provide a sufficient resolution of the sensor signal to manually identify changes caused by applied reversible, artificial pseudo-defects from reference measurements without any damage. \u003c\/p\u003e\n\n\u003cp\u003eThe intended audience of this book are people from the field which are familiar with the basic concepts of electrical engineering or similar regions, embedded system enthusiasts and all readers who like to follow the process of a complete wireless electronic system design from requirements analysis to final material-integrated measurement demonstrations.\u003c\/p\u003e","brand":"WoB","offers":[{"title":"- \/ - \/ -","offer_id":51680354599185,"sku":"","price":0.0,"currency_code":"GBP","in_stock":true},{"title":"US \/ NEW \/ INGRAM","offer_id":51680354795793,"sku":"NIN9783031706479","price":0.0,"currency_code":"GBP","in_stock":false},{"title":"GB \/ NEW \/ GARDNERS","offer_id":51717821399313,"sku":"NGR9783031706479","price":0.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/3031706471.jpg?v=1786088516"},{"product_id":"functional-compliance-of-multifunctional-bondlines-with-disbond-arrest-and-healt-book-julian-steinmetz-9783031724213","title":"Functional Compliance of Multifunctional Bondlines with Disbond Arrest and Health Monitoring Features for Safe and Efficient Composite Joints","description":"\u003cp\u003eSafe and efficient joints are key for improving the structural efficiency of composite aircraft. Therefore, this thesis investigates the potential of multifunctional bondlines, combining structural bonding, disbond arrest features, and structural health monitoring. The central research question is how to achieve a functionally compliant design. This means ensuring disturbances between these functions do not eliminate their benefits regarding the objective of safe and efficient joints. The approach is adding discrete multifunctional disbond arrest features, functionally integrating disbond arrest and sensor functions, to epoxy bondlines. Experimental results indicate some major challenges such as a stiffness conflict for the integrated functions. Nevertheless, securing the epoxy bondline without disturbing its static strength proves successful in the end. In addition, the thesis provides some new insights regarding the functional compliance concept. For example, it strongly suggests considering temporal aspects, such as transient material properties.\u003c\/p\u003e","brand":"WoB","offers":[{"title":"- \/ - \/ -","offer_id":51728363749649,"sku":"","price":0.0,"currency_code":"GBP","in_stock":true},{"title":"GB \/ NEW \/ GARDNERS","offer_id":51728364208401,"sku":"NGR9783031724213","price":0.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/3031724216.jpg?v=1788867498"},{"product_id":"new-kirchhoff-love-beam-element-and-its-application-to-polymer-mechanics-book-matthias-c-schulz-9783031063428","title":"A New Kirchhoff-Love Beam Element and its Application to Polymer Mechanics","description":"The novel finite element formulations fall into the category of geometrically exact Kirchhoff-Love beams. 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The demand for more efficient combustion engines with fuel flexibility goes along with increasing component requirements regarding strength and durability, while the development costs should remain low. In this context, the present book focuses on the gas exchange valves of heavy-duty engines. Especially, the valves on the exhaust side have an increased risk of fatigue failure. The aim of this book is the generation of a predictive fatigue strength assessment to strengthen the frontloading of the exhaust valve design process and to increase the reliability of the component. In the context of fatigue assessment, this book examines the loads of the exhaust valve during its working cycle. Beside the high temperature and cylinder pressure, further loads act on the exhaust valve like actuation force or an eccentric impact of the valve on the valve seat ring. Furthermore, a bold valve secondary dynamic in the form of valve bending vibrations is observed on the exhaust valves of heavy-duty engines increasing the valve load even more. The cause of this secondary dynamic is unknown. This book investigates the valve loads to get the necessary input for the fatigue strength assessment. With respect to a predictive approach, the determination of valve dynamic and valve loads is based on a multibody simulation model of the valve train. In order to deliver predictive results and a transferable method, this simulation model includes all relevant physical effects to describe the valve dynamic accurately during all valve load phases of the working cycle. With the simulation model, the root cause for the bold valve secondary dynamic is examined iteratively. The model delivers not only the cause for the valve secondary dynamic but most importantly the critical valve loads. These loads deliver the input for the fatigue strength assessment. To ensure the robustness of the load data determined by the simulation model, the sensitivity of influences on the valve load is examined. In this context geometrical misalignment, fluctuations in load data and variable engine operation points are considered. A load collective based on the variation of influences on the valve load is the result of this analysis. All the results of the influence and sensitivity study are generated with the newly developed simulation model of the valve train. Moreover, this book outlines measurements on a testbed engine. In scope of these measurements are temperature and strain measurements of the valve. The generated data validate the simulation model of the valve train. 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However, the extended wingspan of HAR wings is accompanied by challenges, including ground operations, structural loads, and aircraft control. Folding wingtips (FWTs) address these challenges by incorporating a hinge at the outboard wing section, enabling the wingtip to fold during ground operations or specific flight scenarios. Wingtip actuators that allow active adjustment of the wingtip's cant angle and hinge stiffness can expand the potential operating modes of FWTs beyond the current state-of-the-art. Possible operating modes include extended load alleviation, mission adaptability, advanced flight control, and active flutter suppression. While most research on FWTs focuses on flight dynamics and aeroelasticity, little attention has been given to the structural design of wingtip actuators. This book introduces an actuator concept that transforms FWTs into multifunctional wingtip devices, referred to as actuated adaptive wingtips. The concept of actuated adaptive wingtips is based on a compliant morphing structure that adapts its mechanical properties by varying the fluid pressure in structure-integrated chambers.\u003c\/p\u003e","brand":"WoB","offers":[{"title":"- \/ - \/ INTERNAL","offer_id":52500828946705,"sku":null,"price":0.0,"currency_code":"GBP","in_stock":true},{"title":"GB \/ NEW \/ GARDNERS","offer_id":52500829798673,"sku":"NGR9783031881022","price":0.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/9783031881022.jpg?v=1760138998"},{"product_id":"characterisation-of-the-mechanical-properties-of-heat-induced-protein-deposits-i-book-jintian-liu-9783031218514","title":"Characterisation of the Mechanical Properties of Heat-Induced Protein Deposits in Immersed Cleaning Systems","description":"\u003cp\u003eDuring heat treatment in dairy production, the rapid formation of heat-induced fouling deposits on the plant surface leads to reduced efficiency of heat transfer. 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The experimental results reveal the significant influence of the thickness of fouling deposits on their mechanical behaviour and the time-dependent nonlinear behaviour of the deposits.\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003cp\u003eFurthermore, heat-induced whey protein gel was used as the modelmaterial for fouling deposits and the non-fractured and fracture behaviour was characterized using compression and wire cutting experiments, respectively. The material parameters identified using the inverse finite element method allow the prediction of fracture behaviour under localized external loads and provide a deeper insight into cohesive removal. To investigate the softening effect during caustic washing, tensile experiments were conducted on chemically treated and untreated whey protein gels. Adequate chemical degradation leads to a softer mechanical response and increased stress relaxation, making whey protein gels more flowable and more resistant to tensile deformation. The experimental results provide useful data on the failure behaviour of chemically treated whey protein gels.\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e","brand":"WoB","offers":[{"title":"GB \/ NEW \/ INGRAM","offer_id":52618863575313,"sku":"NLS9783031218514","price":0.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/9783031218514.jpg?v=1791923733"},{"product_id":"bauteilintegrierte-uberwachung-variothermer-faserverbundfertigungsprozesse-mitte-book-alexander-kyriazis-9783662681640","title":"Bauteilintegrierte Überwachung variothermer Faserverbundfertigungsprozesse mittels minimalinvasiver Foliensensoren auf löslichem Substrat","description":"Um bei der Fertigung von Faserverbundkunststoffen Zeit, Energie und Kosten sparen zu können, werden möglichst viele Informationen über die Vorgänge während des Fertigungsprozesses benötigt. Die Integration von Foliensensoren in die hergestellten Bauteile ist eine von mehreren Möglichkeiten, diese Informationen zu erhalten. Foliensensoren bestehen aus einer thermoplastischen Folie, auf der metallische Elektroden strukturiert sind. Ihre Integration in das Bauteil bringt unterschiedliche Vor- und Nachteile mit sich. Einerseits sind bauteilintegrierte Sensoren flexibler einsetzbar als werkzeugintegrierte Sensoren und ermöglichen eine feinere räumliche Auflösung der Aushärtevorgänge. Andererseits werden sie bei der Fertigung zum Produktbestandteil. Sie sollten deswegen einfach und kostengünstig sein, sowie die Lasttragfähigkeit nicht beeinträchtigen. Aus mechanischer Sicht bringen Foliensensoren vor allem ein Delaminationsrisiko mit sich. Die Wahl des thermoplastischen Substratmaterials macht dabei den entscheidenden Einflussfaktor aus. Während Sensoren auf Basis des häufig verwendeten Materials Polyimid ein erhebliches Delaminationsrisiko mit sich bringen, ist der Einfluss von Polyetherimid weit weniger schädlich oder verbessert sogar einzelne Festigkeitskennwerte. Neben dem Substratmaterial wirken sich auch die metallischen Sensorstrukturen auf die Belastbarkeit aus. Zur Gestaltung minimalinvasiver Sensoren sollte ein möglichst geringer Metallisierungsgrad angestrebt werden. Das verbreitetste Design für Foliensensoren zur Aushärteüberwachung sind sogenannte Interdigitalelektroden, die eine elektrische Kapazität bilden, deren Impedanz von der direkten Umgebung beeinflusst wird. In variothermen Fertigungsprozessen besteht eine Herausforderung darin, den Einfluss der Temperatur von dem des Aushärtegrades zu trennen. Die an integrierten Sensoren gemessenen Impedanzinformationen müssen dazu eine Verarbeitung durchlaufen, in deren Verlauf die Frequenzabhängigkeit und die Einflüsse von Temperatur und Sensorgeometrie aus den Daten entfernt werden. Für eine variotherme Aushärteüberwachung ist daher die Verwendung eines zusätzlichen Temperatursensors unverzichtbar. Die Sensordaten bieten darüber hinaus Potential für die Ermittlung des Faservolumengehalts oder zur Detektion von Harzfehlanmischungen.","brand":"WoB","offers":[{"title":"GB \/ NEW \/ INGRAM","offer_id":52659884753169,"sku":"NLS9783662681640","price":0.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/9783662681640.jpg?v=1762264010"},{"product_id":"aktives-folienlager-mit-nachgiebigem-lagertrager-und-piezokeramischen-patchaktua-book-hannes-schmiedeke-9783662700945","title":"Aktives Folienlager mit nachgiebigem Lagerträger und piezokeramischen Patchaktuatoren","description":"Folienlager sind Gleitlager mit einer nachgiebigen Innenkontur. Dies erlaubt die Kompensation der fliehkraft- und temperaturbedingten Wellenexpansion bei hohen Drehzahlen. Die vielen Reibkontakte zwischen den Folien erhöhen zudem die Lagerdämpfung. Mit aerodynamisch wirkenden Folienlagern ausgestattete Turbomaschinen können somit je nach Baugröße mit mehr als 100.000 U\/min betrieben werden. Ein wesentlicher Faktor, der die Lebensdauer begrenzt, ist der Verschleiß bei jedem Start-Stop-Zyklus. Unglücklicherweise können Folienlager geometrisch entweder auf einen geringeren Verschleiß beim Anfahren oder eine größere Stabilität bei hohen Drehzahlen optimiert werden. In dem hier vorliegenden Buch wird daher der Ansatz eines aktiv schaltbaren Folienlagers vorgestellt, bei welchem das Lagerspiel und die geometrische Vorspannung (Preload) je nach Betriebszustand eingestellt werden können. Anhand theoretischer Überlegungen und experimenteller Beobachtungen zeigt sich eine grundsätzliche Eignung der im aktiven Lager angestrebten Schaltformen. So ist trotz signifikanter Einflüsse von Fertigungs- und Montageabweichungen eine Verbesserung des Anfahrverhaltens bzw. ein stabiler Betrieb bei hohen Drehzahlen sichtbar. Die Integration der aktiven Komponente, bestehend aus den piezokeramischen Patchaktuatoren und einem geometrisch an eine dreiflächige Lagerbuchse angelehnten Lagerträger, verändern das Betriebsverhalten gegenüber der passiven Prototypen dabei aber erheblich. So verringert sich neben der Lagersteifigkeit auch die Lagerdämpfung. Zudem genügen moderate Lasten und fertigungsbedingte Eigenspannungen, um die aktive Verformung des Lagerträgers zu blockieren. Theoretische Modelle zeigen, dass eine Versteifung der aktiven Komponente durchaus zielführend ist. Eine praktische Umsetzung ist hingegen aufgrund fehlender Aktuatorwerkstoffe aktuell noch nicht möglich.","brand":"WoB","offers":[{"title":"- \/ - \/ INTERNAL","offer_id":52666275987729,"sku":null,"price":0.0,"currency_code":"GBP","in_stock":true},{"title":"GB \/ NEW \/ INGRAM","offer_id":52666277167377,"sku":"NLS9783662700945","price":0.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/9783662700945.jpg?v=1786089633"},{"product_id":"steuerbares-reibverhalten-trockenlaufender-tribosysteme-book-zhenwei-miao-9783662666272","title":"Steuerbares Reibverhalten trockenlaufender Tribosysteme","description":"Die vorliegende Arbeit untersucht einen neuen Freiheitsgrad zur Beeinflussung der Reibung, indem ein adaptiver Reibbelag entwickelt wird, dessen Reibung aktiv durch den Einsatz von den Piezoaktoren beeinflusst wird, und zwar primär durch Änderung bzw. Kombination verschiedener Materialpaarungen im Betrieb. Ein tribologisch gezielt beeinflussbares Reibsystem ermöglicht für einen breiteren Anwendungsbereich einen Betrieb mit geringer Reibleistung und geringem Verschleiß, indem die tribologischen Eigenschaften bzw. die Reibung bei Veränderungen der Betriebsbedingungen (z.B. Gleitgeschwindigkeit, Temperatur) durch eine Regelung angepasst werden. Bei trockenlaufenden Tribosystemen tritt für einige Reibmaterialien bei konstanter Normalkraft mit zunehmender Gleitgeschwindigkeit ein Abfall des Reibwertes auf. Dieser Abfall ist häufig unerwünscht, weil er beispielweise zu Reibschwingungen des Gesamtsystems oder zur Verringerung der Effektivität in Bremsen oder Kupplungen führen kann. Ein wesentliches Motiv dieses Vorhabens ist das Bestreben, den Reibwert des trockenlaufenden Reibbelages mit zunehmender Gleitgeschwindigkeit konstant zu halten oder ansteigen zu lassen, indem verschiedene unterschiedliche Reibmaterialien einzeln oder zusammen in Kontakt mit dem Gegenkörper gebracht werden. 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Weiterhin kommt k nstliche Intelligenz zur Optimierung und Minimierung der Fehler im Fertigungsprozess zum Einsatz. Durch die Kombination dieser drei Methoden in einem automatisierten Fertigungsprozess lassen sich leichtere und kosteng nstigere Faserverbundbauteile in homogeneren Serien herstellen. Endlosfasern wie Kohlenstofffasern k nnen durch ihre mechanischen Eigenschaften die Leistung dieser Methoden signifikant erh hen","brand":"WoB","offers":[{"title":"GB \/ NEW \/ INGRAM","offer_id":52687094350097,"sku":"NLS9783662661260","price":0.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/9783662661260.jpg?v=1791944827"},{"product_id":"voraussetzungen-der-existenz-frequenzunabhangiger-schalleinstrahlungsformen-book-bernd-christian-hlscher-9783662721384","title":"Voraussetzungen der Existenz frequenzunabhängiger Schalleinstrahlungsformen","description":"\u003cp\u003eZur Effizienzsteigerung im Transportsektor wird häufig Gewicht reduziert, was durch dünnere Strukturen jedoch auch zu erhöhten Schwingungsamplituden und somit Schalleinstrahlung in die Fahrgastzellen führt. Diese Dissertation untersucht einen zuvor publizierten Ansatz zur effizienten Beschreibung dieser Schalleinstrahlung. Ziel der Arbeit ist es, die Anwendbarkeit dieser Methode auf reale Kavitäten wie Flugzeugkabinen zu prüfen. Untersucht werden die Beteiligung stehender Wellen im Innenraum, die Kopplungsstärke zwischen den Teilsystemen Fluid und Struktur sowie geometrische Voraussetzungen des Modellierungsansatzes. Die Studie zeigt das Auftreten stehender Wellen und schlägt ein neues Kriterium zur Identifikation stark und schwach gekoppelter Systeme vor. Die darüber hinaus nachgewiesenen Anforderungen an die Kabinengeometrie erweisen sich jedoch als erhebliche Einschränkung der praktischen Anwendbarkeit.\u003c\/p\u003e","brand":"WoB","offers":[{"title":"- \/ - \/ INTERNAL","offer_id":52859791474961,"sku":null,"price":0.0,"currency_code":"GBP","in_stock":true},{"title":"GB \/ NEW \/ INGRAM","offer_id":52859791868177,"sku":"NLS9783662721384","price":0.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/9783662721384.jpg?v=1765151464"},{"product_id":"triply-periodic-minimal-surface-structures-for-laminar-flow-control-book-hendrik-traub-9783032138439","title":"Triply Periodic Minimal Surface Structures for Laminar Flow Control","description":"\u003cp\u003eLaminar flow control systems promise substantial emission reductions by minimising the viscous drag of transport aircraft. While boundary-layer suction has been proven in wind tunnel and flight tests, no system effectively improving the energy efficiency of transport aircraft is available. This doctoral thesis develops an additively manufacturable suction panel for laminar flow control, reducing the technology's complexity into one integral component decoupled from the aircraft's main structure. The benefit of additive manufacturing is the integration of complex aerodynamic requirements, such as surface curvature and suction rate control, into the suction panel's design.\u003c\/p\u003e\n\u003cp\u003eManufacturing micro-perforations of the same size as the resolution of industrial 3D printers is challenging. This thesis investigates printable perforation geometries for various additive manufacturing technologies. Identifying their porosity and pressure drop characteristics enables the selection of suitable geometries and technologies to produce micro-perforated surfaces for boundary-layer suction. Stereolithography-printed surfaces with quadratic-truncated-cone perforations effectively delay the laminar-turbulent transition in flat-plate wind tunnel tests.\u003c\/p\u003e\n\u003cp\u003eUnder aerodynamic loading, the micro-perforated surface requires a dense support structure, simultaneously enabling air discharge. However, due to insufficient internal airflow, support structures such as Honeycombs or foams cannot be used. In contrast, triply periodic minimal surfaces offer significant internal airflow while providing dense mechanical support. This thesis investigates the design and mechanical performance of triply periodic minimal surface structures and presents a prediction model based on their relative density. A wing-sizing study employs this model to demonstrate the suction panel's minimal impact on the wing mass.\u003c\/p\u003e\n\u003cp\u003eUltimately, this doctoral thesis presents a design for an additively manufactured suction panel that meets the mechanical and aerodynamic requirements of laminar flow control and aircraft wing design. Successful suction panel component tests result in a design methodology that enables effective transition delay and integrated passive suction rate control. The additively manufactured suction panel reduces complexity and expands the applications of laminar flow control technology. 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