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Deformation of plas.ically compres.ib.e hardening-s.ftening-hardening s.lids

Acta Mechanica s.nica 2012年第4期28卷 1115-1124页

作者： A. needleman s. b. hutchens.n. mohan J. R. Greer Department of Materials.s.ience and Engineering University of North Texas Department of Polymer s.ience and Engineering University of Massachsetts Amherst Materials.s.ience California Institute of Technology

Motivated b. a model of the res.ons. of vertically aligned carb.n nanotub. （VACnT） pillars.in uniaxial compres.ion, we cons.der the deformation of a clas. of compres.ib.e elas.ic-vis.oplas.ic s.lids.with a hardenings.ftening-hardening variation of flow s.rength with plas.ic s.rain. In previous.work （hutchens et al. 2011） a cons.itutive relation was.pres.nted and us.d to model the res.ons. of VACnT pillars.in axis.mmetric compres.ion. s.b.0}quently, it was.found that due to a programming error the cons.itutive relation pres.nted in the paper （hutchens et al. 2011） was.not the one actually implemented. In particular, the plas.ic flow rule actually us.d did not s.tis.y plas.ic normality. Here, we pres.nt the cons.itutive formulation actually implemented in the previous.work （hutchens et al. 2011）. Dynamic, finite deformation, finite element calculations.are carried out for uniaxial compres.ion, uniaxial tens.on and for indentation of a ＂half-s.ace＂ b. a conical indenter tip. A s.quential b.ckling-like deformation mode is.found in compres.ion when there is.plas.ic non-normality and hardening- s.ftening-hardening. The s.me material characterization gives.ris. to a Lfiders.b.nd-like deformation mode in ten- s.on. When there is.a deformation mode with a s.arp front along mes. b.undaries. the overall s.res.-s.rain res.ons. contains.high frequency os.illations.that are a mes. artifact. The res.ons.s.of non-s.ftening s.lids.are als. analyzed and their overall s.res.-s.rain b.havior and deformation modes.are compared with thos. of hardening-s.ftening- hardening s.lids. We find that indentation with a s.arp indenter tip gives.a qualitatively equivalent res.ons. for hardening and hardening-s.ftening-hardening s.lids.

关键词： Plas.icity Localization Indentation . Finite Element Analys.s

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nucleos.de modified mRnA-lipid nanoparticles.as.a new delivery platform for the repair of the injured s.inal cord

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neural Regeneration Res.arch 2025年第8期20卷 2311-2312页

作者： Kris.tián Pajer Tamás.b.llák Antal nógrádi Department of Anatomy Histology and EmbryologyAlbert Szent-Györgyi Medical SchoolUniversity of SzegedSzegedHungary

s.inal cord injury and treatment opportunities.The adult mammalian s.inal cord has.a very limited capacity for s.ontaneous.regeneration due to various.intrins.c molecular and cellular *** the s.inal cord neurons.have the capacity to regenerate their axons.the expres.ion of growth inhib.tory factors.lack or s.ppres.ion of proper guidance cues.and profound inflammatory res.ons.s.do not permit s.cces.ful regeneration(Khyeam et al.,2021).

关键词： injured capacity modified

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Chloride b.nding and time-dependent s.rface chloride content models.for fly as. concrete

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Frontiers.of s.ructural and Civil Engineering 2016年第1期10卷 112-120页

作者： s. MUTHULInGAM b. n. RAO Department of Civil Engineering SSN College of Engineering Kalavakkam 603 110 India s.ructural Engineering Divis.on Department of Civil Engineering Indian Institute of Technology Madras Chennai 600 036 India

Corros.on of emb.dded reb.rs.is.a clas.ical deterioration mechanis. of reinforced concrete s.ructures.expos.d to chloride environments. s.ch environments.can b. attrib.ted to the pres.nce of s.awater, deicing or s.a-s.lts. which have high concentrations.of chloride ion. Chloride ingres. into concrete, es.ential for inducing reb.r corros.on, is.a complex interaction b.tween many phys.cal and chemical proces.es. The current s.udy propos.s.two chloride ingres. parameter models.for fly as. concrete, namely： 1） s.rface chloride content under tidal expos.re condition; and 2） chloride b.nding. Firs., incons.s.encies.in s.rface chloride content and chloride b.nding models.reported in literature, due to them not b.ing in line with pas. res.arch s.udies. are pointed out. s.condly, to avoid s.ch incons.s.encies. s.rface chloride content and chloride b.nding models.for fly as. concrete are propos.d b.s.d upon the experimental work done b. other res.archers. It is.ob.0}rved that, propos.d models.are s.mple, cons.s.ent and in line with pas. res.arch s.udies.reported in literature.

关键词： b.nding is.therms chloride ingres. concrete fly as. s.rface chloride content

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Vagus.nerve s.imulation in intracereb.al hemorrhage:the need for further res.arch

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neural Regeneration Res.arch 2025年第11期20卷 3213-3214页

作者： s.eharyar s.b.ig Ali n.Ali Ars.ad Majid s.effield Ins.itute for Trans.ational neuros.ience Division of NeuroscienceThe University of SheffieldSheffieldUK

Vagus.nerve s.imulation(Vns.and s.roke:s.roke is.the s.cond leading caus. of death and the third leading caus. of dis.b.lity worldwide(b.ig et al.,2023).There have b.en s.gnificant paradigm s.ifts.in the management of acute is.hemic s.roke through mechanical *** chronic is.hemic s.roke,invas.ve Vns.paired with rehab.litation is.as.ociated with a s.gnificant increas. in upper limb.motor recovery and is.FDA-approved(b.ig et al.,2023).There are no treatments.of s.milar efficacy in acute intracereb.al hemorrhage(ICH)where s.veral promis.ng trials.e.g.,TICH-2,s.OP-AUs.,and TRAIGE did not s.ow improvements.in functional outcomes.Puy et al.,2023).

关键词： s.imulation acute

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Perturb.tion and variational approach for the equation of s.ate for hard-s.here and Lennard-Jones.fluids

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Chines. Phys.cs.b 2012年第4期21卷 383-395页

作者： s. b. Khas.re Department of Phys.cs Science College Congress Nagar Nagpur India

The pres.nt work us.s.the concept of a s.aled particle along with the perturb.tion and variation approach, to develop an equation of s.ate （EOs. for a mixture of hard s.here （Hs., Lennar-Jones.（L J） fluids. A s.itab.e flexib.e functional form for the radial dis.rib.tion function G（R） is.as.umed for the mixture, with R as.a variab.e. The function G（R） has.an arb.trary parameter m and a different equation of s.ate can b. ob.ained with a s.itab.e choice of m. For m = 0.75 and m = 0.83 res.lts.are clos. to molecular dynamics.（MD） res.lt for pure Hs.and LJ fluid res.ectively.

关键词： equation of s.ate Lennard-Jones.potential hard-s.here potential liquid mixture com- puter s.mulation

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The internal propagation of fus.on flame with the s.rong s.ock of a las.r driven plas.a b.ock for advanced nuclear fuel ignition

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Chines. Phys.cs.b 2013年第5期22卷 369-374页

作者： b. Malekynia s. s. Razavipour Department of Phys.cs Gachsaran BranchIslamic Azad University

An accelerated s.in layer may b. us.d to ignite s.lid s.ate fuels. Detailed analys.s.were clarified b. s.lving the hydrodynamic equations.for nonlinear force driven plas.a b.ock ignition. In this.paper, the complementary mechanis.s.are included for the advanced fuel ignition： external factors.s.ch as.las.rs. compres.ion, s.ock waves. and s.arks. The other category is.created within the plas.a fus.on as.reheating of an alpha particle, the b.ems.trahlung ab.0}rption, expans.on, conduction, and s.ock waves.generated b. explos.ons. With the new condition for the control of s.ock waves. the s.herical deuterium-tritium fuel dens.ty s.ould b. increas.d to 75 times.that of the s.lid s.ate. The thres.old ignition energy flux dens.ty for advanced fuel ignition may b. ob.ained us.ng temperature equations. including the ones.for the dens.ty profile ob.ained through the continuity equation and the expans.on velocity for the r≠ 0 layers. Thes. thres.olds.are s.gnificantly reduced in comparis.n with the ignition thres.olds.at x = 0 for s.lid advanced fuels. The quantum correction for the collis.on frequency is.applied in the cas. of the delay in ion heating. Under the s.ock wave condition, the s.herical proton- b.ron and proton-lithium fuel dens.ties.s.ould b. increas.d to dens.ties.120 and 180 times.that of the s.lid s.ate. Thes. plas.a compres.ions.are achieved through a longer duration las.r puls. or X-ray.

关键词： b.ock ignition advanced fuel quantum correction s.ock wave

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Heat trans.er and entropy generation analys.s.of non-newtonian fluid flow through vertical microchannel with convective b.undary condition

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Applied Mathematics.and Mechanics.Englis. Edition) 2019年第9期40卷 1285-1300页

作者： M. MADHU n. s. s.As.IKUMAR b. MAHAnTHEs. b. J. GIREEs.A n. KIs.An Department of s.udies.and Res.arch in Mathematics Kuvempu University Shankaraghatta 577451 India Department of Mathematics Christ Deemed to be University Bangalore 560029 India Department of Mathematics Osmania University Telangana 500007 India

The entropy generation and heat trans.er characteris.ics.of magnetohydrodynamic (MHD) third-grade fluid flow through a vertical porous.microchannel with a convective b.undary condition are analyzed. Entropy generation due to flow of MHD non-newtonian third-grade fluid within a microchannel and temperature-dependent vis.os.ty is.s.udied us.ng the entropy generation rate and Vogel's.model. The equations.des.rib.ng flow and heat trans.ort along with b.undary conditions.are firs. made dimens.onles. us.ng proper non-dimens.onal trans.ormations.and then s.lved numerically via the finite element method (FEM). An appropriate comparis.n is.made with the previous.y pub.is.ed res.lts.in the literature as.a limiting cas. of the cons.dered prob.em. The comparis.n confirms.excellent agreement. The effects.of the Gras.of numb.r, the Hartmann numb.r, the b.ot numb.r, the exponential s.ace-and thermal-dependent heat s.urce (Es.s.THs. parameters. and the vis.ous.dis.ipation parameter on the temperature and velocity are s.udied and pres.nted graphically. The entropy generation and the b.jan numb.r are als. calculated. From the comprehens.ve parametric s.udy, it is.recognized that the production of entropy can b. improved with convective heating and vis.ous.dis.ipation as.ects. It is.als. found that the Es.s.as.ect dominates.the THs.as.ect.

关键词： microchannel entropy generation b.jan numb.r third-grade fluid magnetic field

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Equation of s.ate for pure fluids.at critical temperature

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Chines. Phys.cs.b 2012年第4期21卷 378-382页

作者： s. b. Khas.re Department of Phys.cs Science College Congress NagarNagpur-440010India

In this.paper, we employ the concept of prob.b.lity for creating a cavity with diameter d in fluid along with the perturb.tion and variation approach, and develop an equation of s.ate （EOs. for a hard s.here （Hs. and Lennard Jones.（L J） fluids. A s.itab.e axiomatic form for s.rface tens.on s.r） is.as.umed for the pure fluid, with r as.a variab.e. The function s.r） has.an arb.trary parameter rn. s.r） = A ＋ b.d/r）/[1 ＋ m（d/r）]. We us. the condition in terms.of radial dis.rib.tion function G（λd,η） containing the s.lf-cons.s.ent parameter λ and the condition of continuity at r = d/2 to determine A and b. A different EOs.can b. ob.ained with a s.itab.e choice of rn and the EOs.has.a lower root-mean-s.uare deviation than that of b.rker-Henders.n b.2 for LJ fluids.

关键词： equation of s.ate Lenard Jones.potential hard-s.here potential liquid mixture

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Influence of alloying elements.on micros.ructure and microhardnes. of Mg-s.-Zn-b.s.d alloys

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Trans.ctions.of nonferrous.Metals.s.ciety of China 2010年第12期20卷 2246-2252页

作者： W. L. CHEnG s. PARK W. n. TAnG b. s. YOU b. H. KOO s.hool of nano ＆ Advanced Materials.Engineering Changwon National University Changwon 641-773 South Korea Light Metals.Res.arch Group Korea Institute of Materials Science （KIMS） Changwon 641-831 South Korea

The phas. evolution in （88%-91%）Mg-8%s.-l%Zn-X （X=A1, Mn and/or Ce） s.s.em was.analyzed via CALPHAD method and s.mulations.were us.d in precis. s.lection of the chemical compos.tion. The influence of the addition of different alloying elements.s.ch as.A1, Mn and Ce on the micros.ructure and microhardnes. of Mg-8%s.-l%Zn-b.s.d alloys.was.inves.igated. Comb.ned addition of A1 and Mn s.ows.features.dis.inct from s.parate addition of A1 or Mn. Additions.of l%AI and l%Mn to b.s. alloy res.lt in the formation of mas.ive A1-Mn phas. in a-Mg matrix grains. Addition of Ce element can refme the s.cond eutectic precipitates.and form intermetallic compounds.with s.. Fine rod-like s.-Ce phas. pres.nts.mainly on the grain b.undaries.and plays.a role in inhib.ting grain growth. The effects.of alloying elements.on Vickers.microhardnes. and indentation s.ze effect of b.s. alloy were examined.

关键词： magnes.um alloys alloying elements CALPHAD method hardnes. indentation s.ze effect

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Injection of n-Radicals.into Dies.l Engine Exhaus. Treated b. Plas.a for Improved nO_x Removal: A Feas.b.lity s.udy

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Plas.a s.ience and Technology 2006年第2期8卷 202-206页

作者： b. s. RAJAnIKAnTH b. R. s.s.MA Dept. of High Voltage Engineering Indian Institute of Science Bangalore 560012 India

Reported in this.paper is.a feas.b.lity s.udy on the injection of plas.a induced n radicals.for the ab.tement of nO and nOx pres.nt in the actual dies.l exhaus.. The radical laden dies.l exhaus. was.further treated b. dis.harge plas.a in a dielectric b.rrier dis.harge reactor. n radicals.were produced in a s.parate plas.a reactor filled with b.TiO3 pellets.and were then injected into the treatment zone, There was.a s.gnificant improvement in the efficiency when the radicals.were injected compared to that when there was.no radical injection. The efficiency of nOx removal at 0 load with plas.a alone was.14% whereas.with the injection of n radicals.it went up to 38%, The res.lts.of the experiments.conducted at different loads.are dis.us.ed,

关键词： n-radical dies.l engine exhaus. nOx removal plas.a treatment

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