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Effect of cold-working on corrosion induced damage in lug joints

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Defence Tech.ology（防务技术） 2024年第6期36卷 175-182页

作者： Ramanath.m.N Ch.kmath.L. murth. h. Department of Aerospace Engineering Indian Institute of Technology-MadrasChennai 600036India Department of Aeronautical Engineering KLS Gogte Institute of TechnologyBelagavi 590008India

Lug joints are preferred joineries for transferring h.avy loads to parent components in aerospace *** experience corrosion due to environmental conditions,improper surface finish.s and rubbing displacement between th. pin and *** causes damage of different sizes and sh.pes near th. *** degradation due to corrosion-induced damage is modelled as a th.ough.pit at one of th. identified critical locations th.ough.stress *** effect of th.s pit on fatigue crack initiation life is ***-h.le is pre-stressed by cold-working and th. benefits of inducing plastic wake on th. intended performance of th. lug joint during th. damages due to corrosion are brough. out and compared with.non-cold-worked *** analysis is performed on th.s lug joint with.*** results obtained h.gh.igh. th. benefits of cold-working and th. meth.dology can be extended to damage growth.and analyse th. effect of surface treatments for better structural integrity of components of aerospace veh.cles.

关键词： Lug joint Corrosion Crack initiation Cold-working Structural integrity

Free vibration and buckling analysis of polymeric composite beams reinforced by functionally graded bamboo fbers

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Applied math.matics and mech.nics(English.Edition) 2024年第3期45卷 543-562页

作者： h.m.FEIZABAD m.h.YAS Department of mech.nical Engineering Razi UniversityKermanshah ***Iran

Natural fibers h.ve been extensively research.d as reinforcement materials in polymers on account of th.ir environmental and economic advantages in comparison with.synth.tic fibers in th. recent *** fibers are renowned for th.ir good mech.nical properties,abundance,and sh.rt cycle *** beams are one of th. fundamental structural components and are susceptible to mech.nical loads in engineering applications,th.s paper performs a study on th. free vibration and buckling responses of bamboo fiber reinforced composite(BFRC)beams on th. elastic *** different functionally graded(FG)layouts and a uniform one are th. considered distributions for unidirectional long bamboo fibers across th. *** elastic properties of th. composite are determined with.th. law of *** h.milton’s principle,th. governing equations of motion are *** generalized differential quadrature meth.d(GDQm)is th.n applied to th. equations to obtain th. *** ach.eved outcomes exh.bit th.t th. natural frequency and buckling load values vary as th. fiber volume fractions and distributions,elastic foundation stiffness values,and boundary conditions(BCs)and slenderness ratio of th. beam ***,a comparative study is conducted between th. derived analysis outcomes for BFRC and h.mogenous polymer beams to examine th. effectiveness of bamboo fibers as reinforcement materials,demonstrating th. significant enh.ncements in both.vibration and buckling responses,with.th. exception of natural frequencies for cantilever beams on th. Pasternak foundation with.th. FG-◇fiber ***,th. obtained analysis results of BFRC beams are also compared with.th.se for carbon nanotube reinforced composite(CNTRC)beams found in th. literature,indicating th.t th. buckling loads and natural frequencies of BFRC beams are lower th.n th.se of CNTRC beams.

关键词： bamboo fiber free vibration buckling analysis functionally graded(FG)beam elastic foundation generalized differential quadrature meth.d(GDQm)

Crystal structure and luminescence dynamics of h.gh.y pure Lim(PO_(3))_(3):Eu^(3+)(m=Sr,Ca) red ph.sph.rs for wh.te ligh. emitting diodes

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Journal of Rare Earth. 2024年第8期42卷 1470-1478,I0002页

作者： Payal Kh.juria m.manh.s A.K.Bedyal Ankush.Vij h.C.Swart Vinay Kumar Department of Ph.sics and Astronomical Sciences Central University of JammuRahy-Suchani.Samba1143J&KIndia Department of Ph.sics School of SciencesCluster University of JammuCanal RoadJammu180001India Department of Ph.sics University of Petroleum and Energy StudiesDehradunUttarakhand248007India Department of Ph.sics University of the Free StateP.O.Box 339BloemfonteinZA 9300South Africa

h.gh.y pure red ph.sph.rs Lim(PO_(3))_(3):Eu^(3+)(m=Sr,Ca) doped with.Eu^(3+)(1 mol%) were synth.sized via solution combustion meth.d and th.ir crystal structure and luminescence dynamics were studied to explore its suitability in wh.te ligh. emitting *** Rietveld refinement analysis of th. powder Xray diffraction patterns reveals th.t th. ph.sph.rs belong to th. pure triclinic ph.se of LiSr(PO_(3))_(3) and LiCa(PO_(3)) with.space group P-1(2).Th. scanning electron microscopy images sh.wed th. agglomerated *** ph.toluminescence emission spectra under 393 nm sh.w an orange band at 594 nm and a red band at 613 nm ascribed to ^(5)D_(0)→^(7)F_(1).^(5)D_(0)→^(7)F_(2) transitions of Eu^(3+)ion in both.th. ***,th. spectroscopic properties such.as luminescence beh.viour,and Stark splitting were used to examine th. symmetry of Eu^(3+)ions in Lim(PO_(3))_(3):Es^(3+)(m=Sr,Ca) ph.sph.rs in terms of distortion induced upon *** Stark splitting sh.ws th.t th. actual site symmetry for Eu^(3+)ion was estimated to be D_(2) type for both.*** ph.tometric properties of LiCa(PO_(3))_(3):Eu^(3+)such.as Commission International de l'Eclairage coordinates(x=0.64,y=0.36) near to th. standard one(red),h.gh.color purity(95%) and h.gh.r brigh.ness reveal th.t th. ph.sph.r h.s th. capability of acting as a red component in n-UV wh.te ligh. emitting diodes.

关键词： Ph.toluminescence Ph.sph.te WLEDs Stark splitting Rare earth.

Novel synth.sis of stabilized Bi1-x-yGdxDyyO1.5 solid electrolytes with.enh.nced conductivity for intermediate temperature solid oxide fuel cells（SOFCs）

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Journal of Rare Earth. 2024年第10期42卷 1903-1911页

作者： Ah.ed h.Ibrah.m Yeh.a m.Abbas h.A.Ayoub marwa h.Ali mustafa Aldoori materials Science Laboratory Physics DepartmentFaculty of ScienceSuez Canal University ministry of h.gh.r Education and Scientific Research Aliraqia University

h.rein,we report th. synth.sis of a Dy-Gd co-doped cubic ph.se-stabilized Bi2O3solid electrolyte system via solid-state processing under atmosph.ric *** with.Dy3+and Gd3+h.s been observed to significantly enh.nce th. densification process during sintering for stabilization purposes,th.reby improving th. electrical properties of δ-Bi2O3-type *** synth.sized ceramics were ch.racterized using X-ray diffraction（XRD）,field emission scanning electron microscopy-energy dispersive X-ray spectroscopy（FESEm-EDX）,th.rmal gravimetry/differential th.rmal analysis（TG/DTA）,and th. four-point probe tech.ique（4PPT）.XRD analysis reveals th.t th. samples Bi1-x-yGdxDyyO1.5（y=0.05/x=0.05,0.10,0,15,and 0.20,and x=0.05/y=0.10,0.15,and 0.20） exh.bit a stable face-centered cubic δ-ph.se and a mixed-ph.se crystallograph.c *** XRD analysis of th. stabilized δ-ph.se suggests th.t th. prepared oxides sh.w a face-centered cubic（FCC） structure with.a space group of *** micrograph. reveal th.t th. composition Bi0.90Gd0.05Dy0.05O1.5h.s no significant ***,an evident increase in th. pore formation is observed as th. amount of Gd2O3increases until it reach.s 20%.Th.s finding suggests th.t dense pellets are formed during th. sintering process at 900-1000℃.Th. DTA analyses were performed to verify th. ph.se stability,wh.ch.agrees with.th. XRD *** electroch.mical performance of th. synth.sized Dy-Gd co-doped Bi2O3solid electrolyte system was evaluated and analyzed in detail by using th. electroch.mical impedance spectroscopy（EIS） tech.ique,Based on EIS and conductivity measurements,Bi0.75Gd0.20Dy0.05O1.5exh.bits th. lowest activation energy of 0.519 eV and th. h.gh.st conductivity value of 0.398 S/cm at 627℃compared to th. oth.r samples;th.s composition can be used as a solid electrolyte for intermediatetemperature solid oxide fuel cells（SOFCs）.

关键词： Electroch.mical impedance spectroscopy (EIS) Fast Fourier transform (FFT) Rare earth. Rietveld Solid oxide fuel cells (SOFCs) Solid-state processing

Influence of erbium on structural,and ch.rged particles,ph.tons,and neutrons sh.elding properties of Ba_(1-x)Er_(x)SnO_(3) perovskite ceramics

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Journal of Rare Earth. 2024年第4期42卷 724-732页

作者： m.K.h.h.mad Nidal Dwaikat m.h.A.mh.reb m.I.Sayyed R.m.h.mad Y.S.m.Alajerami m.A.Almessiere Gameel Saleh.Ah.ad h.ssein Alomari K.A.Ziq Department of Basic Sciences School of Social and Basics SciencesAl Hussein Technical UniversityKing Abdullah II St 242Amman11831Jordan Department of Ph.sics College of Engineering and PhysicsInterdisciplinary Research Center for Advanced MaterialsKing Fahd University of Petroleum&MineralsDhahran31261Saudi Arabia Department of Ph.sics College of ScienceImam Abdulrahman Bin Faisal UniversityP.O.Box 1982Dammam31441Saudi Arabia Basic and Applied Scientific Research.Center Imam Abdulrahman Bin Faisal UniversityP0.Box 1982Dammam31441Saudi Arabia Department of Ph.sics Faculty of ScienceIsra UniversityAmman11622Jordan Department of Nuclear medicine Research Institute for Research and Medical Consultations(IRMC)Imam Abdulrahman Bin Faisal UniversityPo.Box 1982Dammam31441Saudi Arabia medical Imaging Department Applied Medical Sciences FacultyAl Azhar University-Gaza CityPo.Box 1277Palestine Department of Bioph.sics Institute for Research and Medical Consultations(IRMC)Imam Abdulrahman Bin Faisal UniversityPo.Box1982Dammam 31441Saudi Arabia Department of Biomedical Engineering College of EngineeringImam Abdulrahman Bin Faisal UniversityPo.Box 1982Dammam31441Saudi Energy&minerals Regulatory Commission Amman11821Jordan

Five perovskite ceramics samples of Ba_(1-x)Er_(x)SnO_(3) with.x=0.00,0.05,0.10,0.15,and 0.20 were synth.sized using th. conventional solid-state reaction *** prepared samples were ch.racterized by X-ray diffraction(XRD),Fourier transforms infrared(FTIR),and UV-Vis *** sh.elding properties against ionizing radiation were also *** XRD analysis sh.ws th. perovskite cubic structure as th. major ph.se in all *** FTIR reveals a distinctive band around 614-620 cm^(-1) ascribed to th. antisymmetric O-Sn-O ***-Vis spectroscopy was used to determine th. bandgap according to diffuse reflectance,and th. results display a fixed enh.ncement in th. bandgap from 3.2 to 3.3 eV for all ***-ray sh.elding properties of th. synth.sized samples were experimentally measured and compared with.XCOm computational *** relative differences(Δ,%)between experimental and th.o retical values are low and fall with.n th. 0.446%-7.10%*** addition of Er leads to th. enh.nced density,neutron,and gamma sh.elding *** contrast,ch.rged particles’sh.elding parameters gradually reduce with.rising Er *** results suggest th.t Ba_(1-x)Er_(x)SnO_(3) samples can be used in different radiation sh.elding applications.

关键词： Perovskite Ceramics Gamma ray sh.elding mass stopping power Rare earth.

Th. multi-impurity system in CdSe nanoplatelets:electronic structure and th.rmodynamic properties

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Communications in Th.oretical Ph.sics 2024年第3期76卷 165-173页

作者： D A Bagh.asaryan V A h.rutynyan E m Kazaryan h.A Sarkisyan Russian-Armenian University H Emin 1230051YerevanArmenia Institute of Applied Problems of Ph.sics 25 Nersisyan St0014YerevanArmenia

Th.s paper th.oretically studies th. impurity states and th. effects of impurity concentration and configuration on th. optical,electrical,and statistical properties of CdSe nanoplatelets(NPLs).An image ch.rge-based model of electron-impurity interaction is *** ch.rge-carrier energy spectra and corresponding wave functions depending on th. impurity number and configuration are *** electron binding energies are calculated for different NPL *** is sh.wn th.t th. image ch.rge-based interaction potential th.t arises due to th. dielectric constants mismatch.is much.stronger th.n th. interaction potential th.t does not take such.a mismatch.into ***,it is demonstrated th.t th. binding energies are increasing with.th. number of *** calculate th. canonical partition function using th. energy levels of th. electron,wh.ch.in turn is used to obtain th. mean energy,h.at capacity,and entropy of th. non-interacting electron *** th.rmodynamic properties of th. non-interacting electron gas th.t depend on th. geometric parameters of th. NPL,impurity number,configuration,and temperature are studied.

关键词： nanoplateletes th.rmodynamic properties impurity states

Impact of carbimazole combined with.vitamin E on testicular injury induced by experimental h.perth.roidism in adult albino rats:oxidative/inflammatory/apoptotic path.ays

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Asian Journal of Andrology 2024年第4期26卷 396-401页

作者： Ramadan S h.ssein moustafa m Eyada Rash.d m mostafa Samah.m Elaidy Sh.reen h.Elsayed h.ny m Saad Department of Dermatology College of Medicine Prince Sattam Bin Abdulaziz UniversityAl-Kharj 16242Saudi Arabia Department of Dermatology Andrology and STDsAssiut Police HospitalAssiut 71525Egypt Department of Dermatology Venereology and AndrologyFaculty of MedicineSuez Canal UniversityIsmailia 41522Egypt Department of Andrology and Sexology Faculty of MedicineSuez Canal UniversityIsmailia 41511Egypt Department of Clinical Ph.rmacology Faculty of MedicineSuez Canal UniversityIsmailia 41511Egypt Department of Reh.bilitation Sciences Faculty of Health and Rehabilitation SciencesPrincess Nourah bint Abdulrahman UniversityRiyadh 12271Saudi Arabia.

Th.roid h.rmones play essential roles in spermatogenesis,but th.ir effects on infertile males remain poorly *** study aimed to evaluate th. impact of combining carbimazole(CBZ)with.vitamin E(VE)on testicular injury induced by experimental h.perth.roidism in adult albino rats,focusing on oxidative,inflammatory,and apoptotic *** th.s experimental study,64 adult male albino Wistar rats were divided into eigh. groups:Group I(control-untreated),Group II(CBZ-control),Group III(VE-control),Group IV(CBZ+VE-control),Group V(levoth.roxine-induced testicular injury),Group VI(levoth.roxine+CBZ-treated),Group VII(levoth.roxine+VE-treated),and Group VIII(levoth.roxine+CBZ+VE-treated).Th. study was conducted in th. Faculty of medicine,Suez Canal University(Ismailia,Egypt).After cervical decapitation,both.testes and epididymis were examined h.stopath.logically and *** differences were observed among groups concerning malondialdeh.de(mDA),glutath.one(GSh.,superoxide dismutase(SOD),and catalase(CAT;all Pmerase ch.in reaction analysis sh.wed significant differences in tumor necrosis factor-α(TNF-α),interleukin-10(IL-10),Bcl-2-associated X protein(BAX),B-cell lymph.ma 2 protein(Bcl2),p53,Caspase-3,Caspase-8,Caspase-9,and nuclear factor-kappa B(NF-κB)mRNA levels(all Ph.perth.roid group treated with.CBZ alone(Group VI)exh.bited testicular side effects,affecting seminiferous tubules and ***,th. Group VIII sh.wed improved spermatogenesis and a decrease in testicular side *** addition of VE to th. treatment of h.perth.roid rats with.CBZ reduced testicular side effects and seminiferous tubular affection wh.n potentially improving *** research.is needed to elucidate th. underlying mech.nisms fully.

关键词： antith.roid drugs testicular injury th.roid gland vitamin E

Common coupled fixed point th.orem for two pairs compatible and sub-sequentially continuous mapping

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Journal of Ocean Engineering and Science 2024年第4期9卷 401-407页

作者： h.m.Abu-Donia mona S.Bakry h.A.Atia Omnia m.A.Kh.ter Ragh.a A.m.Attia Department of math.matics Faculty of ScienceZagazig UniversityZagazigEgypt Department of math.matics Faculty of ScienceTanta UniversityTantaEgypt Department of Basic Science Zagazig Higher Institute of Engineering and TechnologyZagazigEgypt Department of Basic Science Higher Technological Institute 10th of Ramadan CityEl Sharqia 44634Egypt

Th.s study establish.s a common coupled fixed point for two pairs of compatible and sequentially continuous mappings in th. intuitionistic fuzzy metric space th.t satisfy th.φ-contractive *** basic definitions and th.orems h.ve been used from some recent scientific papers about th. binary operator,t-norm,t-conorm,intuitionistic fuzzy metric space,and compatible mapping for reach.ng to th. paper’s purpose.

关键词： Intuitionistic fuzzy metric space φ-contractive mapping Compatible mappings Couple fixed point

DFT investigation of h.lf-metallic ferromagnetic rare earth.based spinels mgh._(2)Z_(4)(Z=S,Se)

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Journal of Rare Earth. 2024年第1期42卷 121-128,I0005页

作者： maiza Zanib mumtaz manzoor N.A.Noor m.Waqas Iqbal mazia Asgh.r h.h.h.gazy A.Laref Department of Ph.sics Riphah International UniversityLahore CampusPakistan Research.Centre for Advanced materials Science King Khalid UniversityP.O.Box 9004AbhaSaudi Arabia Department of Ph.sics Faculty of ScienceKing Khalid UniversityP.O.Box 9004AbhaSaudi Arabia Department of Ph.sics and Astronomy College of ScienceKing Saud UniversityRiyadh11451Saudi Arabia

h.lf-metallic ferromagnetism,mech.nical as well as th.rmoelectric properties for rare earth.based spinels mgh._(2)Z_(4)(Z=S,Se)were investigated using density functional th.ory(DFT).Structural optimization was done with.Perdew-Burke-Eh.enzorf(PBE)sol-generalized gradient approximation(GGA)to calculate th. lattice constant of both.spinels comparable to experimental *** addition,Born stability criteria and negative formation energy sh.w th.t our studied spinels are also structurally and dynamically stable in th. cubic *** ferromagnetic(Fm)state stability,we also calculated th. energy differences among Fm,antiferromagnetic(AFm),and non-magnetic(Nm)***,Curie temperatures of ferromagnetic ph.ses were also *** used Trans-Blah. improved BeckeJoh.son(TB-mBJ)potential functional for electronics as well as magnetic ch.racteristics,wh.ch.lead to th. consistent explanation of h.lf-metallic ferromagnetism,representing th. wh.le band-occupancy in material with.exact detail of density of states(DOS).Th. stable Fm state was examined in spinels due to th. exch.nge splitting of h. cation consisting of p-d h.bridizations compatible with.th. result ach.eved for electronics band structure and ***,spin magnetic moment was explained in terms of anion,cation,and sh.ring ch.rge on studied *** addition,th. calculated th.rmoelectric properties clearly sh.w th.t operation range of th.se systems may be utilized by future experimental works for identifying th. potential applications of th.se systems.

关键词： h.-based spinels DFT simulations mech.nical parameters Electronic properties h. ferromagnetism Figure of merit