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Researcher Information

last modified:2022/01/25

Associate Professor NIIYAMA, Tomoaki

Mail Laboratory Website

Faculty, Affiliation

Faculty of Mechanical Engineering, Institute of Science and Engineering

College and School Educational Field

Division of Mechanical Science and Engineering, Graduate School of Natural Science and Technology
Course in Mechanical Sciences, School of Mechanical Engineering, College of Science and Engineering

Laboratory

Academic Background

【Degree】
PhD (Science)

Career

Year & Month of Birth

Academic Society

Award

Specialities

Mathematical physics/Fundamental condensed matter physics、Plastic deformation, Fracture

Speciality Keywords

Fracture,Plastic deformation,Dislocations,Molecular dynamics simulations,Self-organized criticality,nonequilibrium physics,Materials science,Complex systems,Chaos,Nonlinear dyanmics

Research Themes

Books

Papers

  •  Dislocation Emission from Grain Boundaries in High-Entropy Alloys: Influence of Atomic Composition at Grain Boundaries Kohei Shiotani,Tomoaki Niiyama,Tomotsugu Shimokawa MATERIALS TRANSACTIONS 61 7 1272 2020/06
  •  Dislocation Emission from Grain Boundaries in High-Entropy Alloys: Influence of Atomic Compositions at Grain Boundaries SHIOTANI Kohei,NIIYAMA Tomoaki,SHIMOKAWA Tomotsugu Journal of the Society of Materials Science, Japan 69 2 141 2020/02 
  •  Lotka-Volterra competition mechanism embedded in a decision-making method T. Niiyama,G. Furuhata,A. Uchida,M. Naruse,S. Sunada Journal of the Physical Society of JAPAN 89 1 014801 2020/01 
  •  Interfacial-dislocation-controlled deformation and fracture in nanolayered composites: Toward higher ductility of drawn pearlite Shimokawa Tomotsugu,Niiyama Tomoaki,Okabe Masashi,Sawakoshi Jun ACTA MATERIALIA 164 602 2019/02/01
  •  Crystal Plasticity Analysis on Ductility of Ferrite/Cementite Multilayers: Effect of Dislocation Absorption Ability of the Hetero Interface Yasuda Yohei,Shimokawa Tomotsugu,Ohashi Tetsuya,Niiyama Tomoaki TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN 105 2 24 2019/02

show all

  •  Mean first passage times reconstruct the slowest relaxations in potential energy landscapes of nanoclusters Okushima Teruaki,Niiyama Tomoaki,Ikeda Kensuke S,Shimizu Yasushi PHYSICAL REVIEW E 100 3 2019/09/23
  •  On-chip photonic decision maker using spontaneous mode switching in a ring laser Homma Ryutaro,Kochi Satoshi,Niiyama Tomoaki,Mihana Takatomo,Mitsui Yusuke,Kanno Kazutaka,Uchida Atsushi,Naruse Makoto,Sunada Satoshi SCIENTIFIC REPORTS 9 2019/07/01
  •  A Mechanism of Carbon-Cluster Strengthening though Atomic Simulations Shimokawa Tomotsugu,Yasui Kiichiro,Niiyama Tomoaki,Kinoshita Keisuke,Sawada Hideaki Journal of the Japan Institute of Metals and Materials 2019
  •  Structural relaxation affecting shear-transformation avalanches in metallic glasses Niiyama Tomoaki,Wakeda Masato,Shimokawa Tomotsugu,Ogata Shigenobu PHYSICAL REVIEW E 100 4 2019/10/02
  •  Strain-hardening characteristics of ferrite layers in pearlite microstructure Y. Yasuda,T. Ohashi,T. Shimokawa,T. Niiyama Materials Science and Technology (United Kingdom) 34 7 772 2018/05/03
  •  Slowest kinetic modes revealed by metabasin renormalization Teruaki Okushima,Tomoaki Niiyama,Kensuke S. Ikeda,Yasushi Shimizu Physical Review E 97 2 021301 2018/02/01
  •  Changes of graph structure of transition probability matrices indicate the slowest kinetic relaxations Okushima Teruaki,Niiyama Tomoaki,Ikeda Kensuke S,Shimizu Yasushi Physical Review E 98 3 032304 2018/09
  •  Annealing effect on dislocation emission from non-equilibrium grain boundaries Keisuke Kinoshtta,Tomoaki Nhyama,Tomotsugu Shimokawa Zairyo/Journal of the Society of Materials Science, Japan 67 2 256 2018/02/01 
  •  Discontinuous dynamics of mode-I crack propagation in single crystals Tomoaki Nuyama,Tomotsugu Shmokawa,Taishi Fujimoto Zairyo/Journal of the Society of Materials Science, Japan 67 2 222 2018/02/01 
  •  Effect of loading condition on statistics of intermittent plasticity in metallic crystals Tomoaki Niiyama,Tomotsugu Shimokawa Zairyo/Journal of the Society of Materials Science, Japan 65 2 119 2016/02/01 
  •  Grain Subdivision Mechanism Related to Partial Disclinations in Severe Plastic Deformation: A Molecular Dynamics Study Tomotsugu Shimokawa,Tomoaki Yamashita,Tomoaki Niiyama,Nobuhiro Tsuji MATERIALS TRANSACTIONS 57 9 1392 2016
  •  Size dependence of vacancy migration energy in ionic nano particles: A potential energy landscape perspective Tomoaki Niiyama,Teruaki Okushima,Kensuke S. Ikeda,Yasushi Shimizu CHEMICAL PHYSICS LETTERS 654 52 2016/06
  •  Barrier effect of grain boundaries on the avalanche propagation of polycrystalline plasticity Tomoaki Niiyama,Tomotsugu Shimokawa PHYSICAL REVIEW B 94 14 2016/10
  •  Atomistic mechanisms of intermittent plasticity in metals: Dislocation avalanches and defect cluster pinning Tomoaki Niiyama,Tomotsugu Shimokawa PHYSICAL REVIEW E 91 2 2015/02
  •  On the origin of atomistic mechanism of rapid diffusion in alkali halide nanoclusters Tomoaki Niiyama,Shin-ichi Sawada,Kensuke S. Ikeda,Yasushi Shimizu EUROPEAN PHYSICAL JOURNAL D 68 4 2014/04
  •  A numerical study upon the atomistic mechanisms of rapid diffusion in nanoclusters Tomoaki Niiyama,Shin-ichi Sawada,Kensuke S. Ikeda,Yasushi Shimizu CHEMICAL PHYSICS LETTERS 503 4-6 252 2011/02
  •  Effect of translational and angular momentum conservation on energy equipartition in microcanonical equilibrium in small clusters Tomoaki Niiyama,Yasushi Shimizu,Taizo R. Kobayashi,Teruaki Okushima,Kensuke S. Ikeda Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 79 5 2009/05/01
  •  Graph-based analysis of kinetics on multidimensional potential-energy surfaces T. Okushima,T. Niiyama,K. S. Ikeda,Y. Shimizu PHYSICAL REVIEW E 80 3 036112 2009/09
  •  Connectivity graph: Multiple connectivity on potential energy surface does affect the dynamics T. Okushima,T. Niiyama,K. S. Ikeda,Y. Shimizu PHYSICAL REVIEW E 76 3 036109 2007/09
  •  Inhomogeneity of local temperature in small clusters in microcanonical equilibrium Tomoaki Niiyama,Yasushi Shimizu,Taizo R. Kobayashi,Teruaki Okushima,Kensuke S. Ikeda PHYSICAL REVIEW LETTERS 99 1 014102 2007/07

Conference Presentations

Others

Arts and Fieldwork

Patent

Theme to the desired joint research

Grant-in-Aid for Scientific Research

Competitive research funding,Contribution

Collaborative research,Consignment study

Classes (Bachelors)

○Basic Literacy for Mathematics and Physics(2019)
○Engineering Mechanics(2019)
○Engineering Mechanics(2019)
○Basic Literacy for Mathematics and Physics(2019)
○Basic Literacy for Mathematics and Physics(2018)
○Engineering Mechanics(2017)
○Engineering Mechanics(2017)
○Basic Literacy for Mathematics and Physics(2017)
○Basic Literacy for Mathematics and Physics(2016)
○Basic Literacy for Mathematics and Physics(2016)

Classes (Graduate Schools)

International Project

International Students

Lecture themes

Others (Social Activities)

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