Interface Strength of Low-Dimensional Small Components

2008 Fiscal Year Final Research Report

• Project/Area Number: 16106002
• Research Category: Grant-in-Aid for Scientific Research (S)
• Allocation Type: Single-year Grants
• Research Field: Materials/Mechanics of materials
• Research Institution: Kyoto University
• Principal Investigator: KITAMURA Takayuki Kyoto University, 大学院・工学研究科, 教授 (20169882)
• Co-Investigator(Kenkyū-buntansha): UMENO Yoshitaka 東京大学, 生産技術研究所, 准教授 (40314231) ; HIRAKATA Hiroyuki 大阪大学, 大学院・工学研究科, 准教授 (40362454) ; SUMIGAWA Takashi 京都大学, 大学院・工学研究科, 講師 (80403989)
• Research Collaborator: SHIMADA Takahiro 京都大学, 大学院工学研究科, 助教 (20534259)
• Project Period (FY): 2004 – 2008
• Keywords: 破壊 / 界面 / 低次元構造体 / ナノスケール / 連続系 / 離散系 / き裂

Research Abstract

ナノスケールの低次元構造体の最弱部である界面の強度評価実験方法を開発し、その場観察とマルチスケールの力学評価を行った。また、原子レベルの構造不安定性解析を行った。その結果、従来の破壊力学(連続系)概念の適用下限は数nm 程度であることを明らかにするとともに、それ以下の離散系支配領域での破壊基準を検討した。

Research Products

• [Journal Article] Effect of Interface Layer Consisting of Nanosprings on Stress Field near Interface Edge (2009)
  • Author(s): Takashi Sumigawa, Taisuke Sueta, Yuya Futamura, Motofumi Suzuki and Takayuki Kitamura
  • Journal Title: Engineering Fracture Mechanics DOI : 10.1016/j.engfracmech(with peer review)
• [Journal Article] Simplified Evaluation of Mechanical Instability in Large-Scale Atomic Structures (2009)
  • Author(s): Takahiro Shimada, Satoru Okawa, Shinichiro Minami and Takayuki Kitamura
  • Journal Title: Materials Science and Engineering A Vols. 513-514(with peer review) Pages: 166-171
• [Journal Article] Creep Crack Initiation at a Free Edge of an Interface between Submicron Thick Elements (2008)
  • Author(s): Hiroyuki Hirakata, Toshihiro Hirako, Yoshimasa Takahashi, Yasunori Matsuoka, Takayuki Kitamura
  • Journal Title: Engineering Fracture Mechanics Vol. 75(with peer review) Pages: 2907-2920
• [Journal Article] Disappearance of Stress Singularity at Interface Edgedue to Nanostructured Thin Film000000 (2008)
  • Author(s): Takashi Sumigawa, Hiroyuki Hirakata, Masaki Takemura, Shohei Matsumoto, Motofumi Suzuki, Takayuki Kitamura
  • Journal Title: Engineering Fracture Mechanics Vol.75(with peer review) Pages: 3073-3083
• [Journal Article] Quantitative Evaluation of Plasticity of a Ductile Nano-Component (2008)
  • Author(s): Yoshimasa Takahashi, Hiroyuki Hirakata, Takayuki Kitamura
  • Journal Title: Thin Solid Films Vol. 516(with peer review) Pages: 1925-1930
• [Journal Article] Role of Plasticity on Interface Crack Initiation from a Free Edge and Propagation in a Nano-Component (2007)
  • Author(s): Yoshimasa Takahashi, Hiroyuki Hirakata, Takayuki Kitamura Hiroyuki Hirakata, Yoshimasa Takahashi, Do Van Truong and Takayuki Kitamura
  • Journal Title: International Journal of Fracture Vol.145(with peer review) Pages: 261-271
• [Journal Article] Fatigue Crack Growth along Interface between Metal and Ceramics Submicron-thick Films inInert Environment (2006)
  • Author(s): Hiroyuki Hirakata, Takayuki Kitamura and Masaya Kitazawa
  • Journal Title: Acta Materialia Vol. 54(with peer review) Pages: 89-97
• [Journal Article] 透過型電子顕微鏡によるナノ構造体の界面端はく離のその場観察 (2006)
  • Author(s): 平方寛之, 高橋可昌, Do Van Truong, 北村隆行
  • Journal Title: 材料 第55巻 Pages: 1073-1080
  • Peer Reviewed
• [Journal Article] Dominant Stress Region of Crack Initiation at Interface Edge of Micro-Dot on Substrate (2006)
  • Author(s): Hiroyuki Hirakata, Yoshimasa Takahashi, Shohei Matsumoto and Takayuki Kitamura
  • Journal Title: Engineering Fracture Mechanics Vol. 73(with peer review) Pages: 2698-2709
• [Journal Article] Ideal Strength of Cu Multi-Shell Nano-wire (2006)
  • Author(s): Akihiro Kushima, Yoshitaka Umeno and Takayuki Kitamura
  • Journal Title: Modeling and Simulation in Materials Science and Engineering Vol. 14(with peer review) Pages: 1031-1039
• [Journal Article] Acta Materialia (2006)
  • Author(s): Sergey V Dmitriev, Takayuki Kitamura, Ju Li, Yoshitaka Umeno, Kisaragi Yashiro and Nobuhiro Yoshikawa
  • Journal Title: Acta Materialia Vol. 53(with peer review) Pages: 1215-1224
• [Journal Article] Ab initio Study of theSurface Properties and Ideal Strengthof (100) Silicon Thin Films (2005)
  • Author(s): Yoshitaka Umeno, Akihiro Kushima, Takayuki Kitamura, Peter Gumbsch, Ju Li
  • Journal Title: Physical Review B Vol. 72(with peer review) Pages: 165431
• [Journal Article] Pre-cracking Technique for Fracture Mechanics Experiments along Interface between Thin Film and Substrate (2005)
  • Author(s): Hiroyuki Hirakata, Takayuki Kitamura and Takato Kusano
  • Journal Title: Engineering Fracture Mechanics Vol. 72(with peer review) Pages: 1892-1904
• [Journal Article] Experimental and Theoretical Investigations of Delamination at Free Edge of Interface between Piezoelectric Thin Films on a Substrate (2005)
  • Author(s): Fulin Shang, Takayuki Kitamura,Hiroyuki Hirakata, Isaku Kanno,Hidetoshi Kotera and K. Terada
  • Journal Title: International Journal of Solids and Structures Vol. 42(with peer review) Pages: 1729-1741
• [Journal Article] Instability Criterion of Inhomogeneous Atomic System (2004)
  • Author(s): Yoshitaka Umeno, Takayuki Kitamura and Ryoji Fushino
  • Journal Title: Materials Science and Engineering A Vol. 379(with peer review) Pages: 229-233
• [Journal Article] Direct Measurement of Interface Strength between Copper Submicron-Dot and Silicon Dioxide Substrate (2004)
  • Author(s): Hiroyuki Hirakata, Takayuki Kitamura and Yoshitake Yamamoto
  • Journal Title: JSME International Journal, Ser. A Vol. 47(with peer review) Pages: 324-330
• [Journal Article] Applicability of Fracture Mechanics on Brittle Delamination of Nano-Scale Film Edge (2004)
  • Author(s): Takayuki Kitamura, Hiroyuki Hirakata and Yusuke Satake
  • Journal Title: JSME International Journal Ser. A Vol. 47(with peer review) Pages: 106-112
• [Journal Article] Theoretical Analysis on Electronic Properties of Zigzag-type Single-Walled Carbon Nanotubesunder Radial Deformation (2004)
  • Author(s): Yoshitaka Umeno, Takayuki Kitamura and Akihiro Kushima
  • Journal Title: Computational Materials Science Vol.30, No. 3-4(with peer review) Pages: 283-287
• [Presentation] Applicability of Fracture Mechanics to Nano-Components (Plenary Lecture) (2009)
  • Author(s): Takayuki Kitamura and Takashi Sumigawa
  • Organizer: The 2nd International Con-ference on Recent Advances in Materials Processing Technology
  • Place of Presentation: Tamil Nadu, India
  • Year and Date: 2009-02-25
• [Presentation] Mechanical Strength of Nano-Elements (Plenary Lecture) (2008)
  • Author(s): Takayuki Kitamura, HiroyukiHirakata, Takashi Sumigawa and Takahiro Shimada
  • Organizer: 17th European Conference on Fracture
  • Place of Presentation: Brno, Czech Republic
  • Year and Date: 2008-09-03
• [Presentation] Investigation and Application of Fracture Mechanics at the Nanoscale (Invited Lecture) (2008)
  • Author(s): Takayuki Kitamura
  • Organizer: Gordon Research Conference Thin Films & Small Scale Mechanical Behavior
  • Place of Presentation: Waterville, ME, the United States of America
  • Year and Date: 2008-07-28
• [Presentation] Strength of Low-Dimensional Nano-Structure (Invited Lecture) (2008)
  • Author(s): Takayuki Kitamura, Takashi Sumigawa and Hiroyuki Hirakata
  • Organizer: The 2nd Inter-national Conference on Heterogeneous Materials Mechanics
  • Place of Presentation: Huangshan, China
  • Year and Date: 2008-06-04
• [Remarks]
  • URL: http://cyber.kues.kyoto-u.ac.jp/
• [Remarks] 研究代表者 : 日本材料学会賞(論文賞)など4 件、研究分担者 : 梅野4件、平方3件、澄川3件
• [Remarks] European Conference on Fracture でのPlenary Lecture 等 16 件
• [Remarks] ウィーン大学(オーストリア)など21 件
• [Remarks] アメリカの出版社より本研究に関する専門書(250-300 頁)の執筆依頼を受け、正式契約を交わしている。
• [Remarks] すでに4 件執筆したほか、2件執筆予定
• [Remarks] 当初研究分担者が東京大学と大阪大学へ昇任移籍。博士課程修了者が、名古屋大学助教、米国MIT研究員、京都大学助教、産業総合研究所研究員、ハノイ工科大学講師等に乞われて就職
• [Remarks] チェコ、韓国(協定締結)、インド等の研究所・大学からの国際共同研究の要請を受け、実施している。