检索结果-南通市图书馆

Thermo-kinetic characteristics on stabilizing hetero-phase interf.ce of.metal matrix composites by crystal plasticity f.nite element method

引用

j.urnal of.Materials science & Technology 2024年第2期169卷 53-67页

作者： Y.B.Zhang s.j.song f.Liu state Key Laboratory of.solidif.cation Processing Northwestern Polytechnical UniversityXi’an 710072China Analytical&Testing Center Northwestern Polytechnical UniversityXi’an 710072China

Using dislocation-based constitutive modeling in three-dimension crystal plasticity f.nite element(3D CPf.)simulations,co-def.rmation and instability of.hetero-phase interf.ce in dif.erent material systems were herein studied f.r polycrystalline metal matrix composites(MMCs).Local stress and strain f.elds in two types of.3layer MMCs such as f.c/f.c Cu-Ag and f.c/bcc Cu-Nb have been predicted under simple compressive ***,more severe strain-induced interf.ce instability can be observed in the f.c/bcc systems than in the f.c/f.c systems upon ref.ning to metallic nanolayered composites(MNCs).By detailed analysis of.stress and strain localization,it has been demonstrated that the interf.ce instability is always accompanied by high-stress concentration,i.e.,thermodynamic characteristics,or high strain prevention i.e.,kinetic characteristics,at the hetero-phase *** then f.llows that the thermodynamic driving f.rceG and the kinetic energy barrier Q during dislocation and shear banding can be adopted to classif. the def.rmation modes,f.llowing the so-called thermo-kinetic *** by inserting a high density of.high-energy interf.ces into the Cu-Nb composites,such thermo-kinetic integration at the hetero-phase interf.ce allows a successf.l establishment of.MMCs with the high△G-high Q def.rmation mode,which ensures high hardening and unif.rm strain distri-bution,thus ef.iciently suppressing the shear band,stabilizing the hetero-phase interf.ce,and obtaining an exceptional combination in strength and *** hetero-phase interf.ce chosen by a couple of.thermodynamics and kinetics can be def.ned as breaking the thermo-kinetic correlation and has been proposed f.r artif.cially designing MNCs.

关键词： Thermodynamics and kinetics Physics-based constitutive modeling Hetero-phase interf.ce Crystal plasticity f.nite element

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Mathematical modeling and simulations of.stress mitigation by coating polycrystalline particles in lithium-ion batteries

引用

Applied Mathematics and Mechanics(English Edition) 2024年第6期45卷 947-962页

作者： N.IQBAL j.CHOI s.f.sHAH C.LEE s.LEE Department of.Mechanical Roboticsand Energy EngineeringDongguk University-SeoulSeoul 04620Republic of Korea

A chemo-mechanical model is developed to investigate the ef.ects on the stress development of.the coating of.polycrystalline Ni-rich LiNixMnyCo_(z)O_(2)(x≥0.8)(NMC)particles with poly(3,4-ethylenedioxythiophene)(PEDOT).The simulation results show that the coating of.primary NMC particles signif.cantly reduces the stress generation by ef.iciently accommodating the volume change associated with the lithium dif.usion,and the coating layer plays roles both as a cushion against the volume change and a channel f.r the lithium transport,promoting the lithium distribution across the secondary particles more ***,the lower stif.ness,higher ionic conductivity,and larger thickness of.the coating layer improve the stress *** paper provides a mathematical f.amework f.r calculating the chemo-mechanical responses of.anisotropic electrode materials and f.ndamental insights into how the coating of.NMC active particles mitigates stress levels.

关键词： lithium-ion battery(LIB) polycrystalline particle coating f.nite element simulation Ni-rich LiNixMnyCo_(z)O_(2)(x>0.8)(NMC)

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Buechel Pappas Resurf.cing shoulder Replacement: Evolution and over 40 Years of.Clinical Experience

引用

Open j.urnal of.Orthopedics 2024年第5期14卷 218-228页

作者： f.ederick f. Buechel Michael j. Pappas Rutgers Nj.Medical school Newark NJ USA south Mountain Orthopaedic Associates South Orange NJ USA New j.rsey Institute of.Technology Newark NJ USA

Background: Early exploration of.the semi constrained “f.oating-socket” total shoulder replacement (TsR) in 1974 led to a prolif.ration of.various unconstrained designs that allowed resection or retention of.the humeral head, depending upon the pathological process involved. Degenerative glenohumeral arthritis with mild to moderate involvement of.subchondral bone allowed f.r a resurf.cing option, while severe humeral head involvement required a partial or f.ll humeral head replacement attached to an intramedullary stem f.r f.xation. All components evolved f.om cemented to cementless application by 1982. The purpose of.this paper is to describe the progression of.Buechel-Pappas (B-P) shoulder replacement development f.om the early 1970’s in both cemented and cement less applications. Methods: Clinical evaluations of.“f.oating-socket” TsR, f.llowed by B-P stem-type, resurf.cing types, bipolar-type and revision components, all of.which comprise the B-P shoulder Replacement system, were perf.rmed over a 49-year period. Results: “f.oating-socket” implants improved the results of.simple, constrained ball-in-socket designs, but generally f.iled by glenoid component loosening in both chimpanzee and human applications. Unconstrained resurf.cing-type components, both anatomical humeral head and f.ll proximal humeral components, were quite successf.l, with minimal f.ilures observed in long-term studies. Bipolar salvage implants, used f.r severe proximal def.ciencies, revisions and massive rotator cuf. arthropathy, were also very successf.l;providing overhead range of.motion in many patients. Conclusions: Resurf.cing hemiarthroplasty, in patients with intact or repairable rotator cuf. mechanisms, gave the most satisf.ctory results and were the least technically complicated to perf.rm, requiring minimal instrumentation. Resurf.cing of.f.ll proximal humeral def.ciencies, using f.moral resurf.cing components, gave similar clinical results to more complex semi-constrained devices,

关键词： Total shoulder Replacement Resurf.cing shoulder Replacement

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Inf.ow and outf.ow permeability tests in a very sof. clay under low stresses

引用

j.urnal of.Rock Mechanics and Geotechnical Engineering 2024年第8期16卷 3270-3283页

作者： j.W.s.Vargas f.A.B.Danziger f.R.Lopes T.Lunne f.deral University of.Rio de j.neiro Rio de JaneiroBrazil Norwegian Geotechnical Institute OsloNorway

In situ inf.ow and outf.ow permeability tests with the BAT probe at sarapuíII sof. clay test site are presented.A description of.the BAT permeability test is provided,discussing its advantages and shortcomings,especially in the case of.very sof. clays under low *** pressures were monitored during probe installation and were f.und to be slightly lower than piezocone u2 pore pressures,consistent with the position of.the *** role of.f.lter tip saturation was investigated af.er the usual saturation procedure provided an unsatisf.ctory pore pressure response during probe *** show that the vacuum saturation procedure provides adequate response during installation and increases the reliability of.the coef.icient of.permeability determination in early *** inf.ow and outf.ow tests yielded similar results,indicating that caref.l execution of.the test can lead to good test repeatability regardless of.the loading *** sequences of.alternated inf.ow and outf.ow tests have yielded similar results,indicating that soil reconsolidation and f.lter clogging were negligible in the tests *** are presented concerning the relationship between index parameters and the in situ coef.icient of.permeability f.r sarapuíII clay,which plot outside the range of.existing databases.

关键词： Permeability test sof. clay BAT probe Inf.ow and outf.ow tests

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

synthesis of.silver Nanoparticles f.om Honeybees and Its Antibacterial Potential

引用

Open j.urnal of.Medical Microbiology 2024年第1期14卷 77-92页

作者： Akamu j. Ewunkem Niore’s j.hnson A’lyiha f. Beard Ilunga Tshimanga Brittany j.stice j.f.ery Meixner Department of.Biological sciences Winston Salem State University Winston Salem NC USA Department of.Clinical science and Laboratory science Winston Salem State University Winston Salem NC USA

Honeybees (Apis mellif.ra) are important pollinators of.f.owering plants and agricultural crops contributing annually to billions of.dollars in revenues to crop production. Honeybees have an average lif.span between 8 weeks to 5 years. Dead honeybees are abundantly available in beehives and can be utilized as an alternative source to synthesize nanoparticles. In recent years, biologically synthesized nanoparticles have been pref.rred over their chemical counterparts. However, honeybee-based-green synthesis of.nanoparticles has not been explored yet. Herein, we report the biosynthesis of.silver nanoparticles f.om honeybees and its antibacterial activity. The synthesis of.silver nanoparticles was monitored visually through a gradual change in color. f.rthermore, the biosynthesized nanoparticles were conf.rmed and characterized by UV-visible spectroscopy. scanning Electron Microscope was utilized to analyze the average size and morphologies of.the biosynthesized nanoparticles. subsequently, the antibacterial potential of.the biosynthesized silver nanoparticles was tested against selected Gram-positive and Gram-negative bacterial strains. It was f.und that a distinct color change f.om yellow to brown in the reaction solution suggested the f.rmation of.silver nanoparticles. The biosynthesized nanoparticles exhibited absorption maxima at 430 nm. The sEM analysis conf.rmed the spherical and cuboidal shape of.the biosynthesized silver nanoparticles with a size range between 10 - 40 nm. f.rthermore, the biosynthesized silver nanoparticles exhibited strong antimicrobial potential against tested Gram-positive and Gram-negative bacteria strains by aggregating on the cell surf.ce. This study showcases the biomedical and agricultural applications of.biosynthesized silver nanoparticles f.om honeybee wings. .

关键词： Honeybee Bacteria Green synthesis Nanoparticles Antimicrobial

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Towards ef.icient strain engineering of.2D materials:A f.ur-points bending approach f.r compressive strain

引用

Nano Research 2024年第6期17卷 5317-5325页

作者： Hao Li f.lix Carrascoso Ana Borrás Gloria P.Moreno f.ancisco j.Aparicio Ángel Barranco Andrés Castellanos Gómez Campus de Cantoblanco Instituto de Ciencia de Materiales de MadridC.Sor Juana Inés de la Cruz328049 MadridSpain Nanotechnology on surf.ces and Plasma Lab Instituto de Ciencia de Materiales de Sevilla(CSIC-Universidad de Sevilla).C/Americo Vespucio 49E-41092 SevilleSpain Departamento de f.sica Aplicada I Escuela Politécnica SuperiorUniversidad de Sevillac/Virgen deÁfrica 7E-41011 SevilleSpain

strain engineering,as a powerf.l strategy to tune the optical and electrical properties of.two-dimensional(2D)materials by def.rming their crystal lattice,has attracted signif.cant interest in recent years.2D materials can sustain ultra-high strains,even up to 10%,due to the lack of.dangling bonds on their surf.ce,making them ideal brittle *** remarkable mechanical resilience,together with a strong strain-tunable band structure,endows 2D materials with a broad optical and electrical response upon ***,strain engineering based on 2D materials is restricted by their nanoscale and strain quantif.cation *** this study,we have modif.ed a homebuilt three-points bending apparatus to transf.rm it into a f.ur-points bending apparatus that allows f.r the application of.both compressive and tensile strains on 2D *** approach allows f.r the ef.icient and reproducible construction of.a strain system and minimizes the buckling ef.ect caused by the van der Waals interaction by adamantane encapsulation *** results demonstrate the f.asibility of.introducing compressive strain on 2D materials and the potential f.r tuning their optical and physical properties through this approach.

关键词： uniaxial compressive strain polymer encapsulation dif.erential ref.ectance spectroscopy exciton tunability

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rescattering of.stimulated Raman side scattering in nonunif.rm plasmas

引用

Matter and Radiation at Extremes 2024年第5期9卷 68-76页

作者： s.Tan Q.Wang Y.Chen W.B.Yao C.Z.Xiao j.f.Myatt school of.Physics and Electronics Hunan UniversityChangsha 410082China Institute of.Applied Physics and Computational Mathematics Beijing 100094China school of.Electrical and Inf.rmation Engineering Anhui University of Science and TechnologyHuainanAnhui 232001China Department of.Electrical and Computer Engineering University of Alberta9211116 St.NWEdmontonAlberta T6G 1H9Canada

Rescattering of.stimulated Raman side scattering(sRss)is observed f.r the f.rst time via two-dimensional(2D)particle-in-cell(PIC)*** construct a theoretical model f.r the rescattering process,which can predict the region of.occurrence of.mth-order sRss and estimate its *** rescattering process is identif.ed by the 2D PIC simulations under typical conditions of.a direct-drive inertial conf.nement f.sion *** electrons produced by second-order sRss propagate nearly perpendicular to the density gradient and gain nearly the same energy as in f.rst-order sRss,but there is no cascade acceleration to produce superhot *** studies f.r a wide range of.ignition conditions show that sRss and associated rescatterings are robust and important processes in inertial conf.nement f.sion.

关键词： nonunif.rm acceleration scattering

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Understanding intrarenal backf.ow: Intrarenal pressure during ureteroscopy and beyond

引用

Asian j.urnal of.Urology 2024年第2期11卷 139-142页

作者： Palle j.s.Osther susanne s.Osther Maria P.Hesselholt sof.a Byllov søren K.Lildal Louise f.Øbro Helene j.ng Urological Research Center Department of UrologyVejle Hospital(a part of Lillebaelt Hospital)University Hospital of Southern DenmarkVejleDenmark Department of.Regional Health Research University of Southern DenmarkOdenseDenmark

The number of.ureterorenoscopic procedures f.r upper urinary tract stone management has increased dramatically during recent years worldwide[1].Developments in f.exible ureteroscope and laser technology have made it possible to successf.lly address larger and more complex stone scenarios *** the other hand,this means that more and more patients are exposed to the potential adverse ef.ects of.ureteroscopy[2].In general,ureteroscopy is considered a saf. ***,serious complications and even deaths do occur,and these events are most likely underreported[3,4].

关键词： beyond likely ureter

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

On the analytical solution of.transient f.iction in channel f.ows

引用

Applied Mathematics and Mechanics(English Edition) 2024年第8期45卷 1447-1466页

作者： f.j.GARCíA-GARCíA P.f.RINAs-ALVARINO Department of.Naval&Industrial Engineering Polytechnic School of EngineeringUniversity of A CorunaCampus Industrial de FerrolFerrol 15403A CorunaSpain Integraciones Técnicas de seguridad S.A.Pol.Ind.Espiritu SantoC/Nobel15Cambre 15650A CorunaSpain

The transient f.iction in channel mean f.ows is the sum of.two contributions,i.e.,the underlying laminar f.ow(ULf.and the purely turbulent component(PTC),and the contributions are analyzed separately by theoretical *** is f.und that,the transient f.iction may be higher or remarkably lower than that in equal-Reynolds number steady-state *** universal time constant f.r plane-parallel laminar f.ows is reported,and the role of.the time constant in a turbulent mean f.ow is *** is shown that the time constant is related to the turbulence's f.ozen ***,a study of.the logarithmic layer during the transient f.ow is accomplished,which shows that the logarithmic layer is destroyed.

关键词： transient f.iction transient f.ow unsteady channel f.ow

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Comparative analysis of.microstructure,mechanical,and corrosion properties of.biodegradable Mg-3Y alloy prepared by selective laser melting and spark plasma sintering

引用

j.urnal of.Magnesium and Alloys 2024年第4期12卷 1496-1510页

作者： P.Minárik M.Zemková s.Šašek j.Dittrich M.Knapek f.Lukáˇc D.Koutný j.j.roš R.Král f.culty of.Mathematics and Physics Charles UniversityKe Karlovu 5Praha 12116Czech Republic Research Centre University ofŽilinaUniverzitná8215/1Žilina 01026Slovakia Institute of.Plasma Physics of.the Czech Academy of.sciences Za Slovankou 1782/318200 Praha 8Czech Republic Institute of.Machine and Industrial Design Brno University of TechnologyTechnická2896/2Brno 61669Czech Republic

This work explored possibilities of.biodegradable magnesium alloy Mg-3Y preparation by two modern powder metallurgy techniques–spark plasma sintering(sPs)and selective laser melting(sLM).The powder material was consolidated by both methods utilising optimised parameters,which led to very low porosity(∼0.3%)in the sLM material and unmeasurably low porosity in the sPs *** main aim of.the study was the thorough microstructure characterisation and interrelation between the microstructure and the f.nctional properties,such as mechanical strength,def.rmability,and corrosion *** materials showed comparable strength of.110 MPa in tension and compression and relatively good def.rmability of.9%and∼21%f.r the sLM and sPs materials,*** corrosion resistance of.the sPs material in 0.1 M NaCl solution was superior to the sLM one and comparable to the conventional extruded *** digital image correlation during loading and the cross-section analysis of.the corrosion layers revealed that the residual porosity and large strained grains have the dominant negative ef.ect on the f.nctional properties of.the sLM *** the other hand,one of.the primary outcomes of.this study is that the sPs consolidation method is very ef.ective in the preparation of.the W3 biodegradable alloy,resulting in material with convenient mechanical and degradation properties that might f.nd practical applications.

关键词： Magnesium Yttrium Powder metallurgy Microstructure Mechanical strength Corrosion resistance

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：