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This Special Issue consists of selected papers from the Experimental Stress Analysis 2020 conference. Experimental Stress Analysis 2020 was organized with the support of the Czech Society for Mechanics, Expert Group of Experimental Mechanics, and was, for this particular year, held online in 19–22 October 2020. The objectives of the conference included identification of current situation, sharing professional experience and knowledge, discussing new theoretical and practical findings, and the establishment and strengthening of relationships between universities, companies, and scientists from the field of experimental mechanics in mechanical and civil engineering. The topics of the conference were focused on experimental research on materials and structures subjected to mechanical, thermal–mechanical, and dynamic loading, including damage, fatigue, and fracture analyses. The selected papers deal with top-level contemporary phenomena, such as modern durable materials, numerical modeling and simulations, and innovative non-destructive materials’ testing.

Technology: general issues --- History of engineering & technology --- residual stresses --- neutron diffraction --- three axis setting --- high resolution --- bent crystal monochromator --- bent crystal analyzer --- stainless steel 316L --- additive manufacturing --- multiaxial loading --- plasticity --- digital image correlation method --- hill yield criterion --- isotropic hardening --- finite element method (FEM) --- straightening process --- three-point bending --- FEM --- control strategy --- billet straightening --- multiaxial fatigue --- high-cycle fatigue --- multiaxial fatigue experiments --- S-N curve approximation --- laser welding --- pressure vessel steel --- microstructure --- X-ray and neutron diffraction --- high-cycle fatigue tests --- wearable --- flexible --- structure --- stiffness --- biomedical --- mechanics --- simulation --- pattern --- 3D print --- PA12 --- tram --- pedestrian --- crash --- windshield model --- HIC --- hole-drilling --- PhotoStress --- digital image correlation --- experimental analysis --- finite element analysis --- composite --- thermoplastic --- interlaminar strength --- polyphenylensulfid --- polyetheretherketone --- polyaryletherketone --- curved beam --- NDE --- infrared thermography --- Infrared Nondestructive Testing --- CFRP --- Anand material model --- material parameters --- ABS-M30 --- indentation test --- genetic algorithm --- acoustic emission --- CFRP composite tube --- unsupervised learning approach --- failure mechanism --- n/a

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This Special Issue consists of selected papers from the Experimental Stress Analysis 2020 conference. Experimental Stress Analysis 2020 was organized with the support of the Czech Society for Mechanics, Expert Group of Experimental Mechanics, and was, for this particular year, held online in 19–22 October 2020. The objectives of the conference included identification of current situation, sharing professional experience and knowledge, discussing new theoretical and practical findings, and the establishment and strengthening of relationships between universities, companies, and scientists from the field of experimental mechanics in mechanical and civil engineering. The topics of the conference were focused on experimental research on materials and structures subjected to mechanical, thermal–mechanical, and dynamic loading, including damage, fatigue, and fracture analyses. The selected papers deal with top-level contemporary phenomena, such as modern durable materials, numerical modeling and simulations, and innovative non-destructive materials’ testing.

Technology: general issues --- History of engineering & technology --- residual stresses --- neutron diffraction --- three axis setting --- high resolution --- bent crystal monochromator --- bent crystal analyzer --- stainless steel 316L --- additive manufacturing --- multiaxial loading --- plasticity --- digital image correlation method --- hill yield criterion --- isotropic hardening --- finite element method (FEM) --- straightening process --- three-point bending --- FEM --- control strategy --- billet straightening --- multiaxial fatigue --- high-cycle fatigue --- multiaxial fatigue experiments --- S-N curve approximation --- laser welding --- pressure vessel steel --- microstructure --- X-ray and neutron diffraction --- high-cycle fatigue tests --- wearable --- flexible --- structure --- stiffness --- biomedical --- mechanics --- simulation --- pattern --- 3D print --- PA12 --- tram --- pedestrian --- crash --- windshield model --- HIC --- hole-drilling --- PhotoStress --- digital image correlation --- experimental analysis --- finite element analysis --- composite --- thermoplastic --- interlaminar strength --- polyphenylensulfid --- polyetheretherketone --- polyaryletherketone --- curved beam --- NDE --- infrared thermography --- Infrared Nondestructive Testing --- CFRP --- Anand material model --- material parameters --- ABS-M30 --- indentation test --- genetic algorithm --- acoustic emission --- CFRP composite tube --- unsupervised learning approach --- failure mechanism --- residual stresses --- neutron diffraction --- three axis setting --- high resolution --- bent crystal monochromator --- bent crystal analyzer --- stainless steel 316L --- additive manufacturing --- multiaxial loading --- plasticity --- digital image correlation method --- hill yield criterion --- isotropic hardening --- finite element method (FEM) --- straightening process --- three-point bending --- FEM --- control strategy --- billet straightening --- multiaxial fatigue --- high-cycle fatigue --- multiaxial fatigue experiments --- S-N curve approximation --- laser welding --- pressure vessel steel --- microstructure --- X-ray and neutron diffraction --- high-cycle fatigue tests --- wearable --- flexible --- structure --- stiffness --- biomedical --- mechanics --- simulation --- pattern --- 3D print --- PA12 --- tram --- pedestrian --- crash --- windshield model --- HIC --- hole-drilling --- PhotoStress --- digital image correlation --- experimental analysis --- finite element analysis --- composite --- thermoplastic --- interlaminar strength --- polyphenylensulfid --- polyetheretherketone --- polyaryletherketone --- curved beam --- NDE --- infrared thermography --- Infrared Nondestructive Testing --- CFRP --- Anand material model --- material parameters --- ABS-M30 --- indentation test --- genetic algorithm --- acoustic emission --- CFRP composite tube --- unsupervised learning approach --- failure mechanism

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The present collection of articles focuses on the mechanical strength properties at micro- and nanoscale dimensions of body-centered cubic, face-centered cubic and hexagonal close-packed crystal structures. The advent of micro-pillar test specimens is shown to provide a new dimensional scale for the investigation of crystal deformation properties. The ultra-small dimensional scale at which these properties are measured is shown to approach the atomic-scale level at which model dislocation mechanics descriptions of crystal slip and deformation twinning behaviors are proposed to be operative, including the achievement of atomic force microscopic measurements of dislocation pile-up interactions with crystal grain boundaries or with hard surface coatings. A special advantage of engineering designs made at such small crystal and polycrystalline dimensions is the achievement of an approximate order-of-magnitude increase in mechanical strength levels. Reasonable extrapolation of macro-scale continuum mechanics descriptions of crystal strength properties at micro- to nano-indentation hardness measurements are demonstrated, in addition to reports on persistent slip band observations and fatigue cracking behaviors. High-entropy alloy, superalloy and energetic crystal properties are reported along with descriptions of deformation rate sensitivities, grain boundary structures, nano-cutting, void nucleation/growth micromechanics and micro-composite electrical properties.

Technology: general issues --- crystal strength --- micro-crystals --- nano-crystals --- nano-polycrystals --- nano-wires --- whiskers --- pillars --- dislocations --- hardness --- crystal size dependencies --- fracture --- strain rate sensitivity --- temperature effect --- indentation size effect --- theoretical model --- nano-indentation --- crack growth --- dislocation models --- pile-ups --- kitagawa-takahashi diagram --- fracture mechanics --- internal stresses --- molecular dynamics simulations --- BCC Fe nanowires --- twin boundaries --- de-twinning --- micromechanical testing --- micro-pillar --- bi-crystal --- discrete dislocation pile-up --- grain boundary --- free surface --- anisotropic elasticity --- crystallographic slip --- molecular dynamics --- nanocutting --- iron --- cutting theory --- ab initio calculations --- hydrogen embrittlement --- cohesive strength --- multiaxial loading --- strain rate --- molecular dynamics simulation --- activation volume --- grain growth --- indentation creep --- size effect --- geometrically necessary dislocations --- FeCrAl --- micropillar --- dislocation --- strain hardening --- crystal plasticity simulations --- persistent slip band --- surface hard coating --- fatigue crack initiation --- fatigue --- cyclic deformation --- internal stress --- copper single crystal --- rafting behavior --- phase-field simulation --- crystal plasticity theory --- mechanical property --- ultrafine-grained materials --- intermetallic compounds --- B2 phase --- strain hardening behavior --- synchrotron radiation X-ray diffraction --- HMX --- elastic properties --- linear complexions --- strength --- lattice distortive transformations --- dislocation emission --- grain boundaries --- nanomaterials --- Hall-Petch relation --- metals and alloys --- interfacial delamination --- nucleation --- void formation --- cracking --- alloys --- nanocrystalline --- thermal stability --- IN718 alloy --- dislocation plasticity --- twinning --- miniaturised testing --- in situ electron microscopy --- magnesium --- anode --- tin sulfide --- lithium ion battery --- conversion reaction --- nanoflower --- rapid solidification --- compression --- crystal strength --- micro-crystals --- nano-crystals --- nano-polycrystals --- nano-wires --- whiskers --- pillars --- dislocations --- hardness --- crystal size dependencies --- fracture --- strain rate sensitivity --- temperature effect --- indentation size effect --- theoretical model --- nano-indentation --- crack growth --- dislocation models --- pile-ups --- kitagawa-takahashi diagram --- fracture mechanics --- internal stresses --- molecular dynamics simulations --- BCC Fe nanowires --- twin boundaries --- de-twinning --- micromechanical testing --- micro-pillar --- bi-crystal --- discrete dislocation pile-up --- grain boundary --- free surface --- anisotropic elasticity --- crystallographic slip --- molecular dynamics --- nanocutting --- iron --- cutting theory --- ab initio calculations --- hydrogen embrittlement --- cohesive strength --- multiaxial loading --- strain rate --- molecular dynamics simulation --- activation volume --- grain growth --- indentation creep --- size effect --- geometrically necessary dislocations --- FeCrAl --- micropillar --- dislocation --- strain hardening --- crystal plasticity simulations --- persistent slip band --- surface hard coating --- fatigue crack initiation --- fatigue --- cyclic deformation --- internal stress --- copper single crystal --- rafting behavior --- phase-field simulation --- crystal plasticity theory --- mechanical property --- ultrafine-grained materials --- intermetallic compounds --- B2 phase --- strain hardening behavior --- synchrotron radiation X-ray diffraction --- HMX --- elastic properties --- linear complexions --- strength --- lattice distortive transformations --- dislocation emission --- grain boundaries --- nanomaterials --- Hall-Petch relation --- metals and alloys --- interfacial delamination --- nucleation --- void formation --- cracking --- alloys --- nanocrystalline --- thermal stability --- IN718 alloy --- dislocation plasticity --- twinning --- miniaturised testing --- in situ electron microscopy --- magnesium --- anode --- tin sulfide --- lithium ion battery --- conversion reaction --- nanoflower --- rapid solidification --- compression

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The fatigue behavior of traditional and advanced materials is a very relevant topic in different strategic applications impacting and affecting our daily lives. The present Special Issue invites papers to update readers on the state of the art on this important topic. Both review and original manuscripts are welcome. Special attention will be dedicated to innovative materials and innovative manufacturing processes or post-treatments able to improve the fatigue life and reliability of a structural component. Scale effect will be also fully treated focusing on different applications and multiscale approaches aimed at understanding structural integrity under cyclic loadings. This state of the art perspective will help engineers, designers and people from the academy gain an updated view on this very challenging topic which is nowadays very important due to the advances in manufacturing technologies that allow complex new materials to be fabricated.

History of engineering & technology --- elevated temperature --- low cycle fatigue --- damage accumulation --- uniaxial and multiaxial loading --- precipitates --- fatigue crack growth --- creep aging --- artificial aging --- fatigue --- nickel-based single crystal superalloy --- life modeling --- resolved shear stress --- railway axle --- semi-elliptical crack --- residual stresses --- friction stir welding --- residual stress --- weak area --- finite element simulation --- life prediction --- high temperature --- 12Cr1MoV steel --- mixed salt environments --- corrosion fatigue --- heat pipe failure --- critical plane model --- multiaxial fatigue --- non–proportional loading --- 316 stainless steel --- 304 stainless steel --- fracture toughness --- coarse-grained heat affected zone (CGHAZ) --- X80 pipeline steels --- weld thermal simulation --- finite element analysis (FEA) --- fatigue performance --- rounded welding region --- finite element modeling (FEM) --- structure optimization --- reinforcing plate --- isotropic hardening --- crack tip opening displacement --- CTOD --- crack closure --- metal matrix composites --- powder metallurgy --- Fe/B4C composites --- iron boride phases (Fe2B/FeB) --- Charpy impact test --- single crystal superalloy --- recrystallization --- fatigue small crack --- slip --- in situ SEM --- ultrasonic cyclic testing --- frequency effect --- control type effect --- strain rate effect --- 50CrMo4 --- SAE 4150 --- high cycle fatigue --- very high cycle fatigue --- statistical analyses --- n/a --- non-proportional loading

Choose an application

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

The fatigue behavior of traditional and advanced materials is a very relevant topic in different strategic applications impacting and affecting our daily lives. The present Special Issue invites papers to update readers on the state of the art on this important topic. Both review and original manuscripts are welcome. Special attention will be dedicated to innovative materials and innovative manufacturing processes or post-treatments able to improve the fatigue life and reliability of a structural component. Scale effect will be also fully treated focusing on different applications and multiscale approaches aimed at understanding structural integrity under cyclic loadings. This state of the art perspective will help engineers, designers and people from the academy gain an updated view on this very challenging topic which is nowadays very important due to the advances in manufacturing technologies that allow complex new materials to be fabricated.

elevated temperature --- low cycle fatigue --- damage accumulation --- uniaxial and multiaxial loading --- precipitates --- fatigue crack growth --- creep aging --- artificial aging --- fatigue --- nickel-based single crystal superalloy --- life modeling --- resolved shear stress --- railway axle --- semi-elliptical crack --- residual stresses --- friction stir welding --- residual stress --- weak area --- finite element simulation --- life prediction --- high temperature --- 12Cr1MoV steel --- mixed salt environments --- corrosion fatigue --- heat pipe failure --- critical plane model --- multiaxial fatigue --- non–proportional loading --- 316 stainless steel --- 304 stainless steel --- fracture toughness --- coarse-grained heat affected zone (CGHAZ) --- X80 pipeline steels --- weld thermal simulation --- finite element analysis (FEA) --- fatigue performance --- rounded welding region --- finite element modeling (FEM) --- structure optimization --- reinforcing plate --- isotropic hardening --- crack tip opening displacement --- CTOD --- crack closure --- metal matrix composites --- powder metallurgy --- Fe/B4C composites --- iron boride phases (Fe2B/FeB) --- Charpy impact test --- single crystal superalloy --- recrystallization --- fatigue small crack --- slip --- in situ SEM --- ultrasonic cyclic testing --- frequency effect --- control type effect --- strain rate effect --- 50CrMo4 --- SAE 4150 --- high cycle fatigue --- very high cycle fatigue --- statistical analyses --- n/a --- non-proportional loading