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Wood composites have shown very good performance, and substantial service lives when correctly specified for the exposure risks present. Selection of an appropriate product for the job should be accompanied by decisions about the appropriate protection, whether this is by design, by preservative treatment or by wood modification techniques. This Special Issue, Advances in Wood Composites presents recent progress in enhancing and refining the performance and properties of wood composites by chemical and thermal modification and the application of smart nanomaterials, which have made them a particular area of interest for researchers. In addition, it reviews some important aspects in the field of wood composites, with particular focus on their materials, applications, and engineering and scientific advances, including solutions inspired biomimetrically by the structure of wood and wood composites. This Special Issue, with a collection of 13 original contributions, provides selected examples of recent Advances in Wood Composites

shear strength --- n/a --- buckling --- thermal property --- acetic anhydride --- WPC --- silicon carbide --- coating amount --- composite --- polymer-triticale boards --- wood --- activation volume --- oriented strand lumber (OSL) --- bending strength --- nanowollastonite --- VOCs --- wood-inorganic composites --- thermal modification --- wood plastic composite --- crystallinity --- sol-gel process --- wood adhesive --- straw --- mechanical properties --- bamboo --- plastic --- carbothermal reduction --- formaldehyde emissions --- cellulose --- graphene nano-platelets --- creep behavior --- surface properties --- dimensional stability --- nanocompounds --- UF resin --- tunnel-structured --- ceramic --- color --- water absorption --- high-density polyethylene film --- mechanical property --- aquacultural --- HDPE --- biorefinery lignin --- methyl methacrylate --- structural analysis --- sol–gel process --- polyurethane-acrylate --- mechanical and physical properties --- water-based UV curing coating --- oak (Quercus alba L.) --- dynamic thermodynamic --- stepped isostress method --- thermoplastic polymers --- sustainable adhesives --- finite element analysis --- rapid formaldehyde release --- adhesive penetration --- modulus of elasticity in bending --- Southwell’s method --- hydrophobicity --- Abaqus --- sepiolite --- chemical structure --- alder plywood --- wood panels --- particleboard properties --- chemical modification --- thickness swelling --- Southwell's method

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In dealing with fracture and fatigue assessments of structural components, different approaches have been proposed in the literature. They are usually divided into three subgroups according to stress-based, strain-based, and energy-based criteria. Typical applications include both linear elastic and elastoplastic materials and plain and notched or cracked components under both static and fatigue loadings. The aim of this Special Issue is to provide an update to the state-of-the-art on these approaches. The topics addressed in this Special Issue are applications from nano- to full-scale complex and real structures and recent advanced criteria for fracture and fatigue predictions under complex loading conditions, such as multiaxial constant and variable amplitude fatigue loadings.

fatigue life prediction --- dissipated energy --- thermo-graphic technique --- thermal evolution --- peridynamics --- composite --- ordinary state-based --- double cantilever composite beam (DCB) --- delamination --- control volume concept --- critical plane approach --- fatigue life assessment --- severely notched specimens --- strain energy density --- monitoring of fatigue crack --- damage index --- ultrasonic guided waves --- sensor network --- structural health monitoring --- thermal fatigue --- thermal barrier coat --- master–slave model --- life prediction --- nozzle guide vane --- microcracks --- multiple fatigue crack --- crack coalescence --- concrete beams --- damage evolution --- multiscale --- fatigue damage evolution --- ABAQUS subroutine --- 3D reconstruction --- MCT scanning --- fatigue life --- cleat filler --- broken coal seam --- wellbore stability --- analytical model --- affecting factors --- fatigue crack --- welded bogie frame --- wheel polygon --- rail corrugation --- running speed --- finite fracture mechanics --- nanoscale --- silicon --- brittle --- notch --- fracture --- nanodevice --- life assessment --- crack initiation --- crack propagation --- finite element method --- scroll compressor --- fatigue --- crack --- metal --- structure --- welded joint --- FEM

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This book offers a collection of 17 scientific papers about the computational modeling of fracture. Some of the manuscripts propose new computational methods and/or how to improve existing cutting edge methods for fracture. These contributions can be classified into two categories: 1. Methods which treat the crack as strong discontinuity such as peridynamics, scaled boundary elements or specific versions of the smoothed finite element methods applied to fracture and 2. Continuous approaches to fracture based on, for instance, phase field models or continuum damage mechanics. On the other hand, the book also offers a wide range of applications where state-of-the-art techniques are employed to solve challenging engineering problems such as fractures in rock, glass, concrete. Also, larger systems such as fracture in subway stations due to fire, arch dams, or concrete decks are studied.

Brittle Fracture --- n/a --- microstructure --- fatigue crack growth --- fracture process zone (FPZ) --- crack shape change --- fracture network modeling --- Mohr-Coulomb --- fracture --- SBFEM --- topological insulator --- fatigue --- progressive collapse analysis --- Phase-field model --- loss of key components --- concrete creep --- compressive stress --- rail squats --- cracks --- force transfer --- rolling contact --- damage-plasticity model --- implicit gradient-enhancement --- extended scaled boundary finite element method (X-SBFEM) --- three-parameter model --- LEFM --- overall stability --- EPB shield machine --- metallic glass matrix composite --- phase field --- reinforced concrete core tube --- bulk damage --- ductility --- thermomechanical analysis --- incompatible approximation --- moderate fire --- finite element simulations --- shear failure --- FSDT --- gradient-enhanced model --- prestressing stress --- self-healing --- peridynamics --- damage-healing mechanics --- stress intensity factors --- damage --- dam stress zones --- shear band --- rock fracture --- random fracture --- surface crack --- plate --- steel reinforced concrete frame --- super healing --- brittle material --- geometric phase --- FE analysis --- grouting --- rock --- elastoplastic behavior --- parameters calibration --- screened-Poisson model --- anisotropic --- numerical simulation --- Discontinuous Galerkin --- brittle fracture --- XFEM/GFEM --- topological photonic crystal --- photonic orbital angular momentum --- conditioned sandy pebble --- yielding region --- finite element analysis --- fluid–structure interaction --- cracking risk --- Mindlin --- ABAQUS UEL --- particle element model --- HSDT --- cell-based smoothed-finite element method (CS-FEM) --- the Xulong arch dam --- fluid-structure interaction

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The present book contains the 16 papers accepted and published in the Special Issue “Mathematical Modeling and Simulation in Mechanics and Dynamic Systems” of the MDPI “Mathematics” journal, which cover a wide range of topics connected to the theory and applications of Modeling and Simulation of Dynamic Systems in different field. These topics include, among others, methods to model and simulate mechanical system in real engineering. It is hopped that the book will find interest and be useful for those working in the area of Modeling and Simulation of the Dynamic Systems, as well as for those with the proper mathematical background and willing to become familiar with recent advances in Dynamic Systems, which has nowadays entered almost all sectors of human life and activity.

T-stress --- X-FEM --- notch --- pipe --- stress difference method (SDM) --- system of transcendental equation --- computational solutions --- code-based modelling approach --- numerical analysis --- Sine-Gordon equations --- photovoltaics --- thermophotovoltaics --- solar energy --- polymer CNTs systems --- interphase section --- percolation onset --- mechanics --- high temperature proton exchange membrane fuel cell --- exergy analysis --- ecological analysis --- ecological coefficient of performance --- SARS-CoV-2 --- COVID-19 --- SEIRD (Susceptible, Exposed, Infected and Recovered and Death) --- SDL --- Catalonia --- nanowire cantilever --- stochastic model --- double Lorentzian spectrum --- HT-PEMFC --- irreversibility --- finite time thermodynamic optimization --- power density --- thermodynamic efficiency --- geometric analogy --- similarity theory --- dimensional analysis --- model law --- heat transfer --- straight bar --- Deep Learning (DL) --- Computational Fluid Dynamics (CFD) --- Artificial Neural Network (ANN) --- Convolutional Neural Network (CNN) --- turbulent flow --- machine learning --- deep learning --- artificial neural network --- ANN --- PEM fuel cell --- modeling --- control --- differentiability --- fractal hydrodynamic regimes --- fractal Schrödinger regimes --- fractal soliton --- fractal kink --- “holographic implementations” --- cubics --- apolar transport --- harmonic mapping principle --- period doubling scenario --- state probability functions --- partial aging in standby --- Monte Carlo simulation --- qualitative and quantitative verification of simulation model --- Lagrange–d’Alembert principle --- non-conservative dynamical system --- Euler–Poincaré equation --- helicopter model --- Lie group --- extended iso-geometric analysis --- extended finite element method --- crack --- pipeline --- ABAQUS --- harmonic mapping --- complex system dynamics --- SL (2R) group --- hidden symmetries --- computer simulations --- actual systems --- transfer learning --- autonomous feature extraction --- n/a --- fractal Schrödinger regimes --- "holographic implementations" --- Lagrange-d'Alembert principle --- Euler-Poincaré equation

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The innovations in construction materials that have been made due to the development of different varieties of concrete have led to innovations in structural applications and design. This Special Issue mainly focuses on state-of-the-art research progress in high-performance concrete, including the effect and characteristics of fibers on the properties of high-performance concrete, the CO2 curing efficiency of high-performance cement composites, and the effect of nano materials when used in ultra-high-performance concrete. This Special Issue also contains two comprehensive review articles covering the following topics: the role of supplementary cementitious materials in ultra-high-performance concrete and recent progress in nanomaterials in cement-based materials. Readers working towards conducting research on innovative construction materials will be exposed to findings related to this topic in this Special Issue.

ultrahigh-performance concrete --- nanosilica --- dynamic light scattering --- zeta potential --- pore solution --- alkali-activator --- GGBFS --- Na2O content --- Ms (SiO2/Na2O) --- workability --- setting time --- steel fiber --- fiber content --- aspect ratio --- toughness index --- high-strength concrete --- fibers --- smart materials --- fiber/matrix bond --- physical properties --- heat treatment --- alkali-activated material --- calcium sulfoaluminate-based expansive additive --- concrete shrinkage --- modulus of elasticity --- shrinkage stress --- SIFRCC --- fiber volume fraction --- direct tensile strength --- energy absorption capacity --- direct tensile test --- carbon nanotubes --- cement-based materials --- concrete infrastructure --- graphene --- graphene oxide --- mechanical strength --- nanomaterials --- nano-Al2O3 --- nano-Fe2O3 --- nano-SiO2 --- nano-TiO2 --- smart infrastructure --- slurry-infiltrated fiber-reinforced cementitious composite --- high-performance fiber-reinforced cementitious composite --- compressive stress --- stress-strain relationship --- filling slurry matrix --- bio-slime --- sulfate attack --- chloride attack --- service life --- multi-layer diffusion --- repair --- concrete --- dynamic compression --- Split Hopkinson Pressure Bars (SPHB) --- brittle materials --- simulation --- calcined zeolite sand --- ultra-high-performance concrete --- pre-wetted --- autogenous shrinkage --- internal curing --- reactive powder concrete --- strength --- basalt fibers --- abrasion --- porosity --- microscopic image processing --- X-ray CT analysis --- porous cementitious materials --- 3D tomographic image --- CO2 curing --- size effect --- colloidal silica --- cement-based material --- casting method --- ultra-high performance fiber-reinforced concrete --- densified silica fume --- agglomeration --- pozzolanic reaction --- densification --- alternative alkali-activated material --- ground granulated blast-furnace slag --- strength development --- CSA expansive additive --- ultrasonic pulse velocity --- temperature --- high performance concrete (HPC) --- C-shape magnetic probe test --- fibre orientation angle --- flexural test --- attenuation factor --- ultra-high-performance steel fiber-reinforced concrete --- multiscale finite element modeling --- multi-point constraint --- multi-scale interface connection --- concrete damage plasticity model --- ABAQUS --- ultra high-performance concrete (UHPC) --- supplementary cementitious materials (SCMs) --- sustainability --- compressive strength --- flowability --- shrinkage --- railway sleeper --- static bending test --- numerical simulation --- structural performance --- high performance fiber reinforced concrete (HPFRC) --- polypropylene fiber (PP) --- polyvinyl alcohol fiber (PVA) --- residual flexural strength --- splitting tensile strength