Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

During the past decades, the applications of braided composites have increased rapidly in a wide variety of sectors including aerospace, automotive, and marine industries. Their intensive use in engineering applications has inevitably created the need to build models in order to determine their mechanical properties. However, the beneficial qualities of braided composites come at a cost in terms of analysis: their mechanical behavior is significantly more difficult to model because of the intrinsic complexity of their architecture. The present work is carried out in collaboration with GDTech engineering and the University of Liège within the framework of the ViBra (i.e. Virtual Braiding) project, whose main goal is to set up reliable numerical simulation tools for the study of braided composites. Specifically, this thesis focuses on the evaluation of the effective elastic mechanical properties of two-dimensional triaxial braided composite materials through finite element analysis. The proposed approach is a homogenization-based multi-scale modeling procedure with a focus made on the meso-scale level. It requires the development of a robust and fully-parametrized model capable of generating the Representative Unit Cell (RUC) of any braided composite material. The model can generate lots of different braided architectures: in addition to the basic geometrical parameters, the model can adapt the tows cross-sectional shape, the undulation path of the tows, or the braiding pattern (i.e. diamond or regular). Material properties were assigned to each constituent of the RUC, taking into account the variation of local orthotropic direction of the fibers inside the tows. Combined with Periodic Boundary Conditions (PBC), homogenization simulations were performed and effective elastic properties were extracted. The methodology developed in the thesis is then validated by making a comparison between an article of the literature and results coming from the present model where a good agreement is achieved. Subsequently, a parametric study is performed to study the influence of the braiding angle on the effective elastic properties. The study is carried out on both diamond and regular braids, with a braiding angle varying from 15° to minimum 70°.

multi-scale modeling --- meso-scale model --- unit cell --- homogenization --- effective material properties --- triaxial braided composites --- Ingénierie, informatique & technologie > Ingénierie aérospatiale

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

Information and communication technology (ICT) is reponsible for up to 10% of world power consumption. In particular, communications and computing systems are indispensable elements in ICT; thus, determining how to improve the energy efficiency in communications and computing systems has become one of the most important issues for realizing green ICT. Even though a number of studies have been conducted, most of them focused on one aspect—either communications or computing systems. However, salient features in communications and computing systems should be jointly considered, and novel holistic approaches across communications and computing systems are strongly required to implement energy-efficient systems. In addition, emerging systems, such as energy-harvesting IoT devices, cyber-physical systems (CPSs), autonomous vehicles (AVs), and unmanned aerial vehicles (UAVs), require new approaches to satisfy their strict energy consumption requirements in mission-critical situations. The goal of this Special Issue is to disseminate the recent advances in energy-efficient communications and computing systems. Review and survey papers on these topics are welcome. Potential topics include, but are not limited to, the following: • energy-efficient communications: from physical layer to application layer; • energy-efficient computing systems; • energy-efficient network architecture: through SDN/NFV/network slicing; • energy-efficient system design; • energy-efficient Internet of Things (IoT) and Industrial IoT (IIoT); • energy-efficient edge/fog/cloud computing; • new approaches for energy-efficient computing and communications (e.g., AI/ML and data-driven approaches); • new performance metrics on energy efficiency in emerging systems; • energy harvesting and simultaneous wireless information and power transfer (SWIPT); • smart grid and vehicle-to-grid (V2G); and • standardization and open source activities for energy efficient systems.

UAV --- relay --- cooperative communications --- buffer --- power control --- energy efficiency --- energy-neutral operation --- wireless powered sensor network --- simultaneous wireless information and power transfer --- energy harvesting --- clustering --- offloading --- Internet of Things (IoT) --- energy --- constraint Markov decision process (CMDP) --- optimization --- computation offloading --- mobile edge computing --- lyapunov optimization --- 1-bit unit cell --- coding metasurface --- adaptive beam focusing --- wireless power transfer --- UAV network --- topology control --- space division

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

Information and communication technology (ICT) is reponsible for up to 10% of world power consumption. In particular, communications and computing systems are indispensable elements in ICT; thus, determining how to improve the energy efficiency in communications and computing systems has become one of the most important issues for realizing green ICT. Even though a number of studies have been conducted, most of them focused on one aspect—either communications or computing systems. However, salient features in communications and computing systems should be jointly considered, and novel holistic approaches across communications and computing systems are strongly required to implement energy-efficient systems. In addition, emerging systems, such as energy-harvesting IoT devices, cyber-physical systems (CPSs), autonomous vehicles (AVs), and unmanned aerial vehicles (UAVs), require new approaches to satisfy their strict energy consumption requirements in mission-critical situations. The goal of this Special Issue is to disseminate the recent advances in energy-efficient communications and computing systems. Review and survey papers on these topics are welcome. Potential topics include, but are not limited to, the following: • energy-efficient communications: from physical layer to application layer; • energy-efficient computing systems; • energy-efficient network architecture: through SDN/NFV/network slicing; • energy-efficient system design; • energy-efficient Internet of Things (IoT) and Industrial IoT (IIoT); • energy-efficient edge/fog/cloud computing; • new approaches for energy-efficient computing and communications (e.g., AI/ML and data-driven approaches); • new performance metrics on energy efficiency in emerging systems; • energy harvesting and simultaneous wireless information and power transfer (SWIPT); • smart grid and vehicle-to-grid (V2G); and • standardization and open source activities for energy efficient systems.

History of engineering & technology --- UAV --- relay --- cooperative communications --- buffer --- power control --- energy efficiency --- energy-neutral operation --- wireless powered sensor network --- simultaneous wireless information and power transfer --- energy harvesting --- clustering --- offloading --- Internet of Things (IoT) --- energy --- constraint Markov decision process (CMDP) --- optimization --- computation offloading --- mobile edge computing --- lyapunov optimization --- 1-bit unit cell --- coding metasurface --- adaptive beam focusing --- wireless power transfer --- UAV network --- topology control --- space division

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

The book proposes extensive and varied design strategies for bone tissue engineering. The design process of materials for bone tissue scaffolds presently represents an issue of crucial importance and is being studied by many researchers throughout the world. A number of studies have been conducted, aimed at identifying the optimal material, geometry, and surface that the scaffold must possess to stimulate the formation of the largest amounts of bone in the shortest time possible.

Medicine --- starfish --- calcium carbonate --- porous calcium phosphate --- β-tricalcium phosphate --- bone substitute --- angiogenesis --- gellan gum --- hydroxyapatite --- lactoferrin --- bone biomaterials --- tissue engineering --- biomaterials --- mechanobiology --- scaffold design --- geometry optimization --- bone repair --- biomaterial --- alcoholism --- alcohol --- geometry optimization of scaffolds --- allograft --- block bone grafts --- custom made bone --- design techniques for scaffold --- precision and translational medicine --- bone regeneration --- graphene oxide --- mesenchymal stem and progenitor cells --- osteogenic differentiation --- poly(methyl methacrylate) --- computational mechanobiology --- bone tissue engineering --- python code --- parametric CAD (Computer Aided Design) model --- bone --- mesenchymal stem cells --- polycarbonate --- resveratrol --- polydatin --- focal adhesions --- bone health --- bacterial cellulose --- nanoAg --- antimicrobial composite --- porous implants --- bone implants --- metamaterials --- titanium --- mechanical properties --- pore size --- unit cell --- porosity --- elastic modulus --- compressive strength --- additive manufacturing --- animal model --- bone fracture --- bone healing --- posterolateral spinal fusion --- regenerative medicine --- bone morphogenetic proteins --- cell growth --- polylysine --- dental implants --- implantology --- epithelial growth --- porous materials

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

The book proposes extensive and varied design strategies for bone tissue engineering. The design process of materials for bone tissue scaffolds presently represents an issue of crucial importance and is being studied by many researchers throughout the world. A number of studies have been conducted, aimed at identifying the optimal material, geometry, and surface that the scaffold must possess to stimulate the formation of the largest amounts of bone in the shortest time possible.

Medicine --- starfish --- calcium carbonate --- porous calcium phosphate --- β-tricalcium phosphate --- bone substitute --- angiogenesis --- gellan gum --- hydroxyapatite --- lactoferrin --- bone biomaterials --- tissue engineering --- biomaterials --- mechanobiology --- scaffold design --- geometry optimization --- bone repair --- biomaterial --- alcoholism --- alcohol --- geometry optimization of scaffolds --- allograft --- block bone grafts --- custom made bone --- design techniques for scaffold --- precision and translational medicine --- bone regeneration --- graphene oxide --- mesenchymal stem and progenitor cells --- osteogenic differentiation --- poly(methyl methacrylate) --- computational mechanobiology --- bone tissue engineering --- python code --- parametric CAD (Computer Aided Design) model --- bone --- mesenchymal stem cells --- polycarbonate --- resveratrol --- polydatin --- focal adhesions --- bone health --- bacterial cellulose --- nanoAg --- antimicrobial composite --- porous implants --- bone implants --- metamaterials --- titanium --- mechanical properties --- pore size --- unit cell --- porosity --- elastic modulus --- compressive strength --- additive manufacturing --- animal model --- bone fracture --- bone healing --- posterolateral spinal fusion --- regenerative medicine --- bone morphogenetic proteins --- cell growth --- polylysine --- dental implants --- implantology --- epithelial growth --- porous materials --- starfish --- calcium carbonate --- porous calcium phosphate --- β-tricalcium phosphate --- bone substitute --- angiogenesis --- gellan gum --- hydroxyapatite --- lactoferrin --- bone biomaterials --- tissue engineering --- biomaterials --- mechanobiology --- scaffold design --- geometry optimization --- bone repair --- biomaterial --- alcoholism --- alcohol --- geometry optimization of scaffolds --- allograft --- block bone grafts --- custom made bone --- design techniques for scaffold --- precision and translational medicine --- bone regeneration --- graphene oxide --- mesenchymal stem and progenitor cells --- osteogenic differentiation --- poly(methyl methacrylate) --- computational mechanobiology --- bone tissue engineering --- python code --- parametric CAD (Computer Aided Design) model --- bone --- mesenchymal stem cells --- polycarbonate --- resveratrol --- polydatin --- focal adhesions --- bone health --- bacterial cellulose --- nanoAg --- antimicrobial composite --- porous implants --- bone implants --- metamaterials --- titanium --- mechanical properties --- pore size --- unit cell --- porosity --- elastic modulus --- compressive strength --- additive manufacturing --- animal model --- bone fracture --- bone healing --- posterolateral spinal fusion --- regenerative medicine --- bone morphogenetic proteins --- cell growth --- polylysine --- dental implants --- implantology --- epithelial growth --- porous materials