Mechanical SystemsMechanical Systems 10nm13.4Lattice defectAtomic shear stress [GPa]-50Atomic bending stress [GPa]0.5mm0.0 0.5Atomic strain, γ (b) Depth = 4nm14.415.4500.2mm(c) Depth = 5nm054Field of study: Molecular Dynamics simulation, Solid Mechanics.EngineeringEngineeringWestudydeformationmechanismsofnanometre-scalematerialsbymoleculardynamics(MD)simulations.Itisdifficulttoexploresuchnanometre-scalematerialsexperimentallyduetotheirsize([nm]=10-9[m]).MDisoneofatomicsimulationmethodsandcansimulatethemovementofeachatominamaterial.UsingMD,weperformdeformationsimulationsofvariousmaterialssuchascarbonnanotubesandbulkmetallicglassestorevealthedeformationpropertiesinatomicscales.Wehavebeenconductingresearchesonthevariouscorrosionmechanismsandthepreventionsoftheboilerequipmentmaterialsandthesteamturbinematerialsforthermalandgeothermalpowerplants.Wealsoresearchonthecreepstrengthsandfracturesofthehigh-pressuresteamturbinerotormaterialsforthermalpowerplantsforlong-termservicesathighertemperatures.Contributetothesafetyimprovementofpowergenerationsandtheeffectiveutilizationofgeothermalenergy.Inthislaboratory,westudynanometre-scalematerialsusingcomputation-simulations.Carbonnanotubesandbulkmetallicglassesarenewmaterialstounderstandthepropertiesofmaterialsinordertousetheminvariousproducts.Ourstudiesrevealessentialdeformationpropertiesofthesenewtheymaybematerials.Basedonourstudies,utilizedinvariousfields.Graduatesareworkinginbroadfieldssuchasautoandelectronicslaboratory,studentsacquirethecomputation-simulationskillandtheknowledgeinsolidmaterials,whichwillbeveryusefulinyourfuturejobs.Asengineersandscientistsinthefuturewepersistinstudy,experiment,analysis,calculationandasdiscussionspresentationsinacademicmeetings,toacquirepracticalabilityandknowledgeonengineeringmaterials.Manyofourgraduatesareactiveinthefieldofresearchanddevelopment,designandproductionmanagementintherelatedcompaniesofmaterial,machinery,automobile,powerandelectricalmachinery.discoveredrecently.Weindustries.Inthislaboratory,inthehaveaswellCreep cracks generated near notch-root of a turbine rotor steel and the distributions of mean stress calculated by FEM.Analyzing the passive films formed on the boiler tube steels in the simulated boiler feed-water of thermal power plants with XPS.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.50nm(a) Depth = 2nmComputation-simulations reveal complex changes of atomic structure in materials. This figure shows distributions of atomic strain under the indentation simulation on bulk metallic glasses.A pit formed on the specimen surface of a turbine blade steel.MasaomiNishimuraAssociate Professor2009, Dr. Eng., Kobe University, Graduate School of Science and Technology. Associate ProfessorPh.D.His academic researches span the strengths and fractures of engineering materials.In the FutureAfter GraduationLi-Bin NiuIn the FutureAfter GraduationSolid Mechanics on Nanometre-scale Materials using Atomic SimulationsImprovingtheReliabilityofPowerPlantMaterials
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