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Failure of cracked components is governed by the stresses in the vicinity of the crack tip. The singular stress contribution is characterised by the stress intensity factor K, the first regular stress term is represented by the so-called T-stress. Sufficient information about the stress state is available, if these two parameters are known Results for K and T are compiled in form of figures, tables, and approximate relations.
Cracks --- stress intensity factor --- stress fields --- T-stress --- fracture mechanics
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The advent of additive manufacturing (AM) processes applied to the fabrication of structural components creates the need for design methodologies supporting structural optimization approaches that take into account the specific characteristics of the process. While AM processes enable unprecedented geometrical design freedom, which can result in significant reductions of component weight, on the other hand they have implications in the fatigue and fracture strength due to residual stresses and microstructural features. This is linked to stress concentration effects and anisotropy that still warrant further research. This Special Issue of Applied Sciences brings together papers investigating the features of AM processes relevant to the mechanical behavior of AM structural components, particularly, but not exclusively, from the viewpoints of fatigue and fracture behavior. Although the focus of the issue is on AM problems related to fatigue and fracture, articles dealing with other manufacturing processes with related problems are also be included.
History of engineering & technology --- milling process --- part functionality --- surface integrity --- research progress --- non-proportional mixed mode loading --- fractography --- mode II stress intensity factor --- finite element analysis --- rail steel --- wheel steel --- monolithic zirconia crown --- dental implant abutment --- cyclic loading --- mode III stress intensity factor --- FEA --- adaptive control --- fatigue testing --- simply supported bending --- mini specimen --- additive manufacturing --- 304L stainless steel --- LCF --- crack propagation --- blade-disc-Franc3D --- mixed-mode cracking --- fatigue life improvement --- materials characterization --- ultrasonic impact treatment --- DMLS --- fatigue --- fracture --- finite element method (FEM)
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The advent of additive manufacturing (AM) processes applied to the fabrication of structural components creates the need for design methodologies supporting structural optimization approaches that take into account the specific characteristics of the process. While AM processes enable unprecedented geometrical design freedom, which can result in significant reductions of component weight, on the other hand they have implications in the fatigue and fracture strength due to residual stresses and microstructural features. This is linked to stress concentration effects and anisotropy that still warrant further research. This Special Issue of Applied Sciences brings together papers investigating the features of AM processes relevant to the mechanical behavior of AM structural components, particularly, but not exclusively, from the viewpoints of fatigue and fracture behavior. Although the focus of the issue is on AM problems related to fatigue and fracture, articles dealing with other manufacturing processes with related problems are also be included.
milling process --- part functionality --- surface integrity --- research progress --- non-proportional mixed mode loading --- fractography --- mode II stress intensity factor --- finite element analysis --- rail steel --- wheel steel --- monolithic zirconia crown --- dental implant abutment --- cyclic loading --- mode III stress intensity factor --- FEA --- adaptive control --- fatigue testing --- simply supported bending --- mini specimen --- additive manufacturing --- 304L stainless steel --- LCF --- crack propagation --- blade-disc-Franc3D --- mixed-mode cracking --- fatigue life improvement --- materials characterization --- ultrasonic impact treatment --- DMLS --- fatigue --- fracture --- finite element method (FEM)
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The advent of additive manufacturing (AM) processes applied to the fabrication of structural components creates the need for design methodologies supporting structural optimization approaches that take into account the specific characteristics of the process. While AM processes enable unprecedented geometrical design freedom, which can result in significant reductions of component weight, on the other hand they have implications in the fatigue and fracture strength due to residual stresses and microstructural features. This is linked to stress concentration effects and anisotropy that still warrant further research. This Special Issue of Applied Sciences brings together papers investigating the features of AM processes relevant to the mechanical behavior of AM structural components, particularly, but not exclusively, from the viewpoints of fatigue and fracture behavior. Although the focus of the issue is on AM problems related to fatigue and fracture, articles dealing with other manufacturing processes with related problems are also be included.
History of engineering & technology --- milling process --- part functionality --- surface integrity --- research progress --- non-proportional mixed mode loading --- fractography --- mode II stress intensity factor --- finite element analysis --- rail steel --- wheel steel --- monolithic zirconia crown --- dental implant abutment --- cyclic loading --- mode III stress intensity factor --- FEA --- adaptive control --- fatigue testing --- simply supported bending --- mini specimen --- additive manufacturing --- 304L stainless steel --- LCF --- crack propagation --- blade-disc-Franc3D --- mixed-mode cracking --- fatigue life improvement --- materials characterization --- ultrasonic impact treatment --- DMLS --- fatigue --- fracture --- finite element method (FEM)
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The dynamic development of global industry and growing demand for new material technologies generate constantly increasing problems regarding premature material degradation and the requirement to determine corrosion mechanisms and to develop new protection/evaluation approaches. Corrosion resistance depends on numerous determinants, such as material structure, chemistry, and complex environmental factors. It is highly challenging to obtain consensus between high corrosion resistance and an economic approach. On the other hand, inadequate levels of corrosion control create serious hazards to life and the environment. This Special Issue, “Recent Advances in Corrosion Science”, brings together fourteen articles and one review, providing a snapshot of the recent activity and development in this field. The book contains studies related to the development of new corrosion-resistant alloys and the determination of microstructure-dependent properties; it also provides an insight into recent approaches towards anticorrosion technologies, such as corrosion inhibitors and composite and metal protective coatings.
corrosion inhibitor --- electrochemical --- AFM --- CO2 corrosion --- austempered gray cast iron --- austempering temperature --- microstructure --- potentiodynamic polarization --- electrochemical impedance spectroscopy --- titanium-based alloys --- passivity breakdown --- pitting corrosion --- carbon steel --- indazole derivatives --- electrochemistry --- DFT --- thermal diffusion coatings --- grade 10.9 bolts --- corrosion resistance --- thermal deformation parameters --- 35CrMoV steel --- grain size --- electrochemical corrosion --- aluminum alloys --- phase characterization --- de-alloying --- titanium aluminides --- oxidation --- non-isothermal --- mechanism --- internal oxidation --- pre-corrosion pits --- residual fatigue life --- 42CrMo steel --- stress intensity factor --- aluminum alloy --- alkaline environment --- impedance analysis --- adsorption --- dihydroxybenzene --- magnesium --- immersion test --- polarization --- cleaning --- bond coat --- PDC coatings --- fillers --- EC-AFM --- corrosion --- metallic materials --- metal coatings --- nickel --- composite coatings --- electrodeposition --- XPS --- electrochemical impedance spectroscopy (EIS) --- boron-doped diamond --- high-temperature treatment --- surface oxidation --- microstructure defects --- electrochemical activity --- n/a
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The dynamic development of global industry and growing demand for new material technologies generate constantly increasing problems regarding premature material degradation and the requirement to determine corrosion mechanisms and to develop new protection/evaluation approaches. Corrosion resistance depends on numerous determinants, such as material structure, chemistry, and complex environmental factors. It is highly challenging to obtain consensus between high corrosion resistance and an economic approach. On the other hand, inadequate levels of corrosion control create serious hazards to life and the environment. This Special Issue, “Recent Advances in Corrosion Science”, brings together fourteen articles and one review, providing a snapshot of the recent activity and development in this field. The book contains studies related to the development of new corrosion-resistant alloys and the determination of microstructure-dependent properties; it also provides an insight into recent approaches towards anticorrosion technologies, such as corrosion inhibitors and composite and metal protective coatings.
Research & information: general --- corrosion inhibitor --- electrochemical --- AFM --- CO2 corrosion --- austempered gray cast iron --- austempering temperature --- microstructure --- potentiodynamic polarization --- electrochemical impedance spectroscopy --- titanium-based alloys --- passivity breakdown --- pitting corrosion --- carbon steel --- indazole derivatives --- electrochemistry --- DFT --- thermal diffusion coatings --- grade 10.9 bolts --- corrosion resistance --- thermal deformation parameters --- 35CrMoV steel --- grain size --- electrochemical corrosion --- aluminum alloys --- phase characterization --- de-alloying --- titanium aluminides --- oxidation --- non-isothermal --- mechanism --- internal oxidation --- pre-corrosion pits --- residual fatigue life --- 42CrMo steel --- stress intensity factor --- aluminum alloy --- alkaline environment --- impedance analysis --- adsorption --- dihydroxybenzene --- magnesium --- immersion test --- polarization --- cleaning --- bond coat --- PDC coatings --- fillers --- EC-AFM --- corrosion --- metallic materials --- metal coatings --- nickel --- composite coatings --- electrodeposition --- XPS --- electrochemical impedance spectroscopy (EIS) --- boron-doped diamond --- high-temperature treatment --- surface oxidation --- microstructure defects --- electrochemical activity
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The mechanics of fracture and fatigue have produced a huge body of research work in relation to applications to metal materials and structures. However, a variety of non-metallic materials (e.g., concrete and cementitious composites, rocks, glass, ceramics, bituminous mixtures, composites, polymers, rubber and soft matter, bones and biological materials, and advanced and multifunctional materials) have received relatively less attention, despite their attractiveness for a large spectrum of applications related to the components and structures of diverse engineering branches, applied sciences and architecture, and to the load-carrying systems of biological organisms. This book covers the broad topic of structural integrity of non-metallic materials, considering the modelling, assessment, and reliability of structural elements of any scale. Original contributions from engineers, mechanical materials scientists, computer scientists, physicists, chemists, and mathematicians are presented, applying both experimental and theoretical approaches.
History of engineering & technology --- Ethylene-propylene diene monomer rubber EPDM --- grommet --- physical properties --- optimization of shape design --- reliability of rocks --- fatigue load --- strain energy --- red sandstone --- distribution of strain energy --- indices --- multi-scale simulation --- fatigue loading --- road bridge decks --- stagnant water --- fracture toughness --- blast furnace slag --- particle size --- compressive strength --- concrete --- concrete cracking --- crack patterns --- carbon fiber-reinforced polymers—CFRP --- RC strengthening (in bending and shear) --- RC beams --- soft materials --- polymers --- strain rate --- defect tolerance --- digital image correlation --- stress concentrators --- notch blunting --- lightning strike --- composite reinforced panel --- blow-off impulse --- electric-thermal coupling --- boundary effect --- size effect --- tensile strength --- physical modelling test --- rock structure --- fracture --- deformation --- mining --- neutral axis --- self-healing --- successive strain gauge --- flexural test --- bridge decks --- pseudo-cracking method --- data assimilation --- triaxial compression test --- sandstone --- rock mechanics --- rock fracture --- energy evolution --- rock-like material --- crack propagation --- discrete element --- strain rate tensor --- velocity field --- jointed rock --- uniaxial tension loading --- numerical analysis --- discrete element method --- strata structural behavior --- numerical simulation --- tension weakening --- fractures --- goaf consolidation --- fatigue life --- modified asphalt mixture --- four-point bending beam fatigue test --- two-point trapezoidal beam fatigue test --- overlay tester --- embedment --- shale rock --- proppant pack --- fracture width --- fly ash --- fineness --- fracture energy --- critical stress intensity factor --- assessment --- bridge evaluation --- compressive membrane action --- concrete bridges --- fatigue --- fatigue assessment --- live loads --- prestressed concrete --- punching shear --- scale model --- CFRP --- Low Velocity Impacts --- Cohesive Zone Model (CZM) --- Finite Element Analysis (FEA) --- VUMAT --- inter-laminar damage --- intra-laminar damage --- chemical grouting --- flowing water --- water plugging rate --- joint roughness coefficient --- damage model --- mode-II microcracks --- thermodynamics --- reinforced concrete beam --- impact and quasi-static loading --- retrofitting --- mineral grain shape --- particle flow code --- uniaxial compression simulation --- rock mechanical property --- mesostructure --- finite element analysis --- cohesive zone model --- high performance concrete --- fibre-reinforced high performance concrete --- compressive stress --- compressive modulus of elasticity --- maximum compressive strain --- tension --- pressure-tension apparatus --- nondestructive testing --- ultrasonic pulse velocity --- ABAQUS FEA --- high-temperature wedge splitting test --- fracture parameters --- reducing condition --- carbon-containing refractories --- strain-softening --- failure probability --- diamond composite --- material failure characteristics --- reliability --- rock cutting picks --- civil engineering --- fiber-reinforced composite laminate --- multi-directional laminate --- delamination --- elastic interface --- energy release rate --- mixed-mode fracture --- enhanced PG-NEM --- functionally graded material (FGM) --- stress intensity factor (SIF) --- modified interaction integral --- metallic glasses --- shear bands --- mechanical properties --- fracture mechanism --- small wind turbine --- stall regulation --- pitch regulation --- aeroelastic simulation --- n/a --- Fatigue --- Fracture mechanics --- Structural integrity --- Polymers --- Composites --- Ceramics --- Concrete --- Rock --- Soft matter --- Advanced materials. --- carbon fiber-reinforced polymers-CFRP
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The mechanics of fracture and fatigue have produced a huge body of research work in relation to applications to metal materials and structures. However, a variety of non-metallic materials (e.g., concrete and cementitious composites, rocks, glass, ceramics, bituminous mixtures, composites, polymers, rubber and soft matter, bones and biological materials, and advanced and multifunctional materials) have received relatively less attention, despite their attractiveness for a large spectrum of applications related to the components and structures of diverse engineering branches, applied sciences and architecture, and to the load-carrying systems of biological organisms. This book covers the broad topic of structural integrity of non-metallic materials, considering the modelling, assessment, and reliability of structural elements of any scale. Original contributions from engineers, mechanical materials scientists, computer scientists, physicists, chemists, and mathematicians are presented, applying both experimental and theoretical approaches.
Ethylene-propylene diene monomer rubber EPDM --- grommet --- physical properties --- optimization of shape design --- reliability of rocks --- fatigue load --- strain energy --- red sandstone --- distribution of strain energy --- indices --- multi-scale simulation --- fatigue loading --- road bridge decks --- stagnant water --- fracture toughness --- blast furnace slag --- particle size --- compressive strength --- concrete --- concrete cracking --- crack patterns --- carbon fiber-reinforced polymers—CFRP --- RC strengthening (in bending and shear) --- RC beams --- soft materials --- polymers --- strain rate --- defect tolerance --- digital image correlation --- stress concentrators --- notch blunting --- lightning strike --- composite reinforced panel --- blow-off impulse --- electric-thermal coupling --- boundary effect --- size effect --- tensile strength --- physical modelling test --- rock structure --- fracture --- deformation --- mining --- neutral axis --- self-healing --- successive strain gauge --- flexural test --- bridge decks --- pseudo-cracking method --- data assimilation --- triaxial compression test --- sandstone --- rock mechanics --- rock fracture --- energy evolution --- rock-like material --- crack propagation --- discrete element --- strain rate tensor --- velocity field --- jointed rock --- uniaxial tension loading --- numerical analysis --- discrete element method --- strata structural behavior --- numerical simulation --- tension weakening --- fractures --- goaf consolidation --- fatigue life --- modified asphalt mixture --- four-point bending beam fatigue test --- two-point trapezoidal beam fatigue test --- overlay tester --- embedment --- shale rock --- proppant pack --- fracture width --- fly ash --- fineness --- fracture energy --- critical stress intensity factor --- assessment --- bridge evaluation --- compressive membrane action --- concrete bridges --- fatigue --- fatigue assessment --- live loads --- prestressed concrete --- punching shear --- scale model --- CFRP --- Low Velocity Impacts --- Cohesive Zone Model (CZM) --- Finite Element Analysis (FEA) --- VUMAT --- inter-laminar damage --- intra-laminar damage --- chemical grouting --- flowing water --- water plugging rate --- joint roughness coefficient --- damage model --- mode-II microcracks --- thermodynamics --- reinforced concrete beam --- impact and quasi-static loading --- retrofitting --- mineral grain shape --- particle flow code --- uniaxial compression simulation --- rock mechanical property --- mesostructure --- finite element analysis --- cohesive zone model --- high performance concrete --- fibre-reinforced high performance concrete --- compressive stress --- compressive modulus of elasticity --- maximum compressive strain --- tension --- pressure-tension apparatus --- nondestructive testing --- ultrasonic pulse velocity --- ABAQUS FEA --- high-temperature wedge splitting test --- fracture parameters --- reducing condition --- carbon-containing refractories --- strain-softening --- failure probability --- diamond composite --- material failure characteristics --- reliability --- rock cutting picks --- civil engineering --- fiber-reinforced composite laminate --- multi-directional laminate --- delamination --- elastic interface --- energy release rate --- mixed-mode fracture --- enhanced PG-NEM --- functionally graded material (FGM) --- stress intensity factor (SIF) --- modified interaction integral --- metallic glasses --- shear bands --- mechanical properties --- fracture mechanism --- small wind turbine --- stall regulation --- pitch regulation --- aeroelastic simulation --- n/a --- Fatigue --- Fracture mechanics --- Structural integrity --- Polymers --- Composites --- Ceramics --- Concrete --- Rock --- Soft matter --- Advanced materials. --- carbon fiber-reinforced polymers-CFRP
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The mechanics of fracture and fatigue have produced a huge body of research work in relation to applications to metal materials and structures. However, a variety of non-metallic materials (e.g., concrete and cementitious composites, rocks, glass, ceramics, bituminous mixtures, composites, polymers, rubber and soft matter, bones and biological materials, and advanced and multifunctional materials) have received relatively less attention, despite their attractiveness for a large spectrum of applications related to the components and structures of diverse engineering branches, applied sciences and architecture, and to the load-carrying systems of biological organisms. This book covers the broad topic of structural integrity of non-metallic materials, considering the modelling, assessment, and reliability of structural elements of any scale. Original contributions from engineers, mechanical materials scientists, computer scientists, physicists, chemists, and mathematicians are presented, applying both experimental and theoretical approaches.
History of engineering & technology --- Ethylene-propylene diene monomer rubber EPDM --- grommet --- physical properties --- optimization of shape design --- reliability of rocks --- fatigue load --- strain energy --- red sandstone --- distribution of strain energy --- indices --- multi-scale simulation --- fatigue loading --- road bridge decks --- stagnant water --- fracture toughness --- blast furnace slag --- particle size --- compressive strength --- concrete --- concrete cracking --- crack patterns --- carbon fiber-reinforced polymers-CFRP --- RC strengthening (in bending and shear) --- RC beams --- soft materials --- polymers --- strain rate --- defect tolerance --- digital image correlation --- stress concentrators --- notch blunting --- lightning strike --- composite reinforced panel --- blow-off impulse --- electric-thermal coupling --- boundary effect --- size effect --- tensile strength --- physical modelling test --- rock structure --- fracture --- deformation --- mining --- neutral axis --- self-healing --- successive strain gauge --- flexural test --- bridge decks --- pseudo-cracking method --- data assimilation --- triaxial compression test --- sandstone --- rock mechanics --- rock fracture --- energy evolution --- rock-like material --- crack propagation --- discrete element --- strain rate tensor --- velocity field --- jointed rock --- uniaxial tension loading --- numerical analysis --- discrete element method --- strata structural behavior --- numerical simulation --- tension weakening --- fractures --- goaf consolidation --- fatigue life --- modified asphalt mixture --- four-point bending beam fatigue test --- two-point trapezoidal beam fatigue test --- overlay tester --- embedment --- shale rock --- proppant pack --- fracture width --- fly ash --- fineness --- fracture energy --- critical stress intensity factor --- assessment --- bridge evaluation --- compressive membrane action --- concrete bridges --- fatigue --- fatigue assessment --- live loads --- prestressed concrete --- punching shear --- scale model --- CFRP --- Low Velocity Impacts --- Cohesive Zone Model (CZM) --- Finite Element Analysis (FEA) --- VUMAT --- inter-laminar damage --- intra-laminar damage --- chemical grouting --- flowing water --- water plugging rate --- joint roughness coefficient --- damage model --- mode-II microcracks --- thermodynamics --- reinforced concrete beam --- impact and quasi-static loading --- retrofitting --- mineral grain shape --- particle flow code --- uniaxial compression simulation --- rock mechanical property --- mesostructure --- finite element analysis --- cohesive zone model --- high performance concrete --- fibre-reinforced high performance concrete --- compressive stress --- compressive modulus of elasticity --- maximum compressive strain --- tension --- pressure-tension apparatus --- nondestructive testing --- ultrasonic pulse velocity --- ABAQUS FEA --- high-temperature wedge splitting test --- fracture parameters --- reducing condition --- carbon-containing refractories --- strain-softening --- failure probability --- diamond composite --- material failure characteristics --- reliability --- rock cutting picks --- civil engineering --- fiber-reinforced composite laminate --- multi-directional laminate --- delamination --- elastic interface --- energy release rate --- mixed-mode fracture --- enhanced PG-NEM --- functionally graded material (FGM) --- stress intensity factor (SIF) --- modified interaction integral --- metallic glasses --- shear bands --- mechanical properties --- fracture mechanism --- small wind turbine --- stall regulation --- pitch regulation --- aeroelastic simulation --- Fatigue --- Fracture mechanics --- Structural integrity --- Polymers --- Composites --- Ceramics --- Concrete --- Rock --- Soft matter --- Advanced materials.
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Digital image correlation (DIC) has become the most popular full field measurement technique in experimental mechanics. It is a versatile and inexpensive measurement method that provides a large amount of experimental data. Because DIC takes advantage of a huge variety of image modalities, the technique allows covering a wide range of space and time scales. Stereo extends the scope of DIC to non-planar cases, which are more representative of industrial use cases. With the development of tomography, digital volume correlation now provides access to volumetric data, enabling the study of the inner behavior of materials and structures.However, the use of DIC data to quantitatively validate models or accurately identify a set of constitutive parameters remains challenging. One of the reasons lies in the compromises between measurement resolution and spatial resolution. Second, the question of the boundary conditions is still open. Another reason is that the measured displacements are not directly comparable with usual simulations. Finally, the use of full field data leads to new computational challenges.
n/a --- image classification --- non-contact video gauge --- X-ray microtomography --- initial condition --- accuracy --- digital image correlation technique --- digital volume correlation --- optical coherence elastography --- automated fiber placement (AFP) --- copper plate --- rupture speed --- layered material --- non-liner dynamic deformation --- composite inspection --- automated systems --- finite element method --- strain measurement --- virtual fields method --- digital volumetric speckle photography --- spatiotemporal evolution --- non-contact measurement --- composite materials --- strain --- interior 3D deformation --- high-speed camera --- gradient correlation functions --- spatial sampling rate --- stress intensity factor --- static analysis --- finite element model updating --- fracture process zone --- elevated temperature --- geosciences --- monitoring --- red sandstone --- structural testing --- cross dichroic prism --- arch structures --- traceable calibration --- stress concentration --- fault geometry --- slip velocity --- uniaxial tensile test --- experimental mechanics --- multi-perspective --- image registration --- super pressure balloon --- stress-strain relationship --- error --- measurement --- earthquake rupture --- acoustic emission technique --- composite structures --- 3D deformation --- traction continuity across interfaces --- DIC --- laser speckles --- image shadowing --- dynamic interfacial rupture --- Digital image correlation (DIC) --- strain gage --- inverse method --- digital image correlation --- characterization of composite materials --- automated composite manufacturing --- woven composite beam --- machine learning --- experimental-numerical method --- 3D digital image correlation --- underwater impulsive loading --- image cross-correlation --- interlaminar tensile strength --- large deformation --- single camera --- image correlation
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