工学部_研究紹介_2019_英語版

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Westudydeformationmechanismsofnanometre-scalematerialsbymoleculardynamics(MD)simulations.Itisdifficulttoexploresuchnanometre-scalematerialsexperimentallyduetotheirsize([nm]=10-9[m]).MDisoneofatomicsimulationmethodsandcansimulatethemovementofeachatominamaterial.UsingMD,weperformdeformationsimulationsofvariousmaterialssuchascarbonnanotubesandbulkmetallicglassestorevealthedeformationpropertiesinatomicscales.Inthislaboratory,westudynanometre-scalematerialsusingcomputation-simulations.Carbonnanotubesandbulkmetallicglassesarenewmaterialsdiscoveredrecently.Wehavetounderstandthepropertiesofmaterialsinordertousetheminvariousproducts.Ourstudiesrevealessentialdeformationpropertiesofthesenewmaterials.Basedonourstudies,theymaybeutilizedinvariousfields.MasaomiNishimuraAssociate Professor2009, Ph. D., Kobe University, Graduate School of Science and Technology. Field of study: Molecular Dynamics simulation, Solid Mechanics.We can discuss deformation mechanisms in nanometre-scale materials by computer experiment. This figure shows torsional or bending deformation analysis of a defective carbon nanotube.Solid Mechanics on Nanometre-scale Materials using Atomic SimulationsComputation-simulations reveal complex changes of atomic structure in materials. This figure shows distributions of atomic strain under the indentation simulation on bulk metallic glasses.Graduatesareworkinginbroadfieldssuchasautoandelectronicsindustries.Inthislaboratory,studentsacquirethecomputation-simulationskillandtheknowledgeinsolidmaterials,whichwillbeveryusefulinyourfuturejobs.NishimuraLabIn the FutureMechanical Systems EngineeringAfter Graduation(a) Depth = 2nm(b) Depth = 4nm(c) Depth = 5nm50nmAtomic strain, γ 0.0 0.510nm14.413.415.4Atomic shear stress [GPa]0-5050Atomic bending stress [GPa]Lattice defectNiuLabWehavebeenconductingresearchesonthevariouscorrosionmechanismsandthepreventionsoftheboilerequipmentmaterialsandthesteamturbinematerialsforthermalandgeothermalpowerplants.Wealsoresearchonthecreepstrengthsandfracturesofthehigh-pressuresteamturbinerotormaterialsforthermalpowerplantsforlong-termservicesathighertemperatures.Contributetothesafetyimprovementofpowergenerationsandtheeffectiveutilizationofgeothermalenergy.Asengineersandscientistsinthefuturewepersistinstudy,experiment,analysis,calculationanddiscussionsinthelaboratory,aswellaspresentationsinacademicmeetings,toacquirepracticalabilityandknowledgeonengineeringmaterials.Dr. Li-Bin NiuAssociate ProfessorHis academic researches span the strengths and fractures of engineering materials.ImprovingtheReliabilityofPowerPlantMaterialsManyofourgraduatesareactiveinthefieldofresearchanddevelopment,designandproductionmanagementintherelatedcompaniesofmaterial,machinery,automobile,powerandelectricalmachinery.0.5mm0.2mmAnalyzing the passive films formed on the boiler tube steels in the simulated boiler feed-water of thermal power plants with XPS.Creep cracks generated near notch-root of a turbine rotor steel and the distributions of mean stress calculated by FEM.A pit formed on the specimen surface of a turbine blade steel.In the FutureAfter GraduationMechanical Systems Engineering58