研究者データベース

中村 孝(ナカムラ タカシ)
工学研究院 機械・宇宙航空工学部門 機械材料システム
教授

基本情報

所属

  • 工学研究院 機械・宇宙航空工学部門 機械材料システム

職名

  • 教授

学位

  • 博士(工学)(東京工業大学)

ホームページURL

J-Global ID

研究キーワード

  • 材料強度学   機械材料学   

研究分野

  • ものづくり技術(機械・電気電子・化学工学) / 材料力学、機械材料

職歴

  • 2007年 - 2010年 北海道大学大学院工学研究科教授(機械宇宙工学専攻) 教授
  • 2007年 - 2010年 Professor
  • 2010年 - 北海道大学大学院工学研究院教授(機械宇宙工学部門) 教授
  • 2010年 - Professor

所属学協会

  • 日本機械学会   日本材料学会疲労部門委員会   

研究活動情報

書籍

  • 機械材料工学(改訂版)
    工学図書 2006年
  • 機械材料工学
    工学図書 2001年

その他活動・業績

  • 小熊 博幸, 中村 孝 材料 60 (12) 1072 -1078 2011年 [査読無し][通常論文]
  • 中村 孝, 小熊 博幸 材料 60 (12) 1066 -1071 2011年 [査読無し][通常論文]
  • Damage Assessment on Low Cycle Fatigue Properties of Cyclic Pre-strained Austenitic Stainless Steel
    Proceedings of the ASME 2011 Pressure Vessels & Piping Division Conference, PVP2011 CD-ROM PVP2011-57832 2011年 [査読無し][通常論文]
  • Vacuum fatigue tests of high strength steel to simulate sub-surface fractures
    Proc. of the 5th International Conference on Very High Cycle Fatigue 251 -256 2011年 [査読無し][通常論文]
  • Influence of environment on the formation of unique morphology on fracture surface in sub-surface fractures
    Proc. of the 5th International Conference on Very High Cycle Fatigue 257 -262 2011年 [査読無し][通常論文]
  • 「宇宙環境曝露によるポリイミドフィルムの機械特性劣化とその予測法」 宇宙航空研究開発機構研究開発報告 JAXA-RR-10-009
    宇宙航空研究開発機構 2011年 [査読無し][通常論文]
  • Hiroyuki OGUMA, Takashi NAKAMURA Journal of the Society of Materials Science Japan 60 (12) 1072 -1078 2011年 [査読無し][通常論文]
  • Takashi NAKAMURA, Hiroyuki OGUMA Journal of the Society of Materials Science Japan 60 (12) 1066 -1071 2011年 [査読無し][通常論文]
  • "Mechanical properties degradation and its prediction methods of polyimide films exposed to space environment" JAXA Research and Development Report JAXA-RR-10-009
    Japan Aerospace Exploration Agency 2011年 [査読無し][通常論文]
  • H. Oguma, T. Nakamura SCRIPTA MATERIALIA 63 (1) 32 -34 2010年07月 [査読無し][通常論文]
     
    Uniaxial tension fatigue tests were conducted on a Ti-6A1-4V alloy that underwent different heat treatments to reveal the effect of microstructures on the very high cycle fatigue properties. The size dependency of the threshold stress intensity factor range is indicated for the sub-surface crack, and a possible mechanism is presented by which sub-surface fractures occur at lower stress levels in the very high cycle regime than do surface-initiated fractures. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
  • 日本機械学会論文集(A編) 76 (764) 428 -430 2010年 [査読無し][通常論文]
  • 日本機械学会論文集(A編) 76 (764) 437 -439 2010年 [査読無し][通常論文]
  • 日本機械学会論文集(A編) 76 (764) 434 -436 2010年 [査読無し][通常論文]
  • 日本機械学会論文集(A編) 76 (764) 431 -433 2010年 [査読無し][通常論文]
  • 日本機械学会論文集(A編) 76 (764) 404 -406 2010年 [査読無し][通常論文]
  • 日本機械学会論文集(A編) 76 (764) 425 -427 2010年 [査読無し][通常論文]
  • 日本機械学会論文集(A編) 76 (764) 422 -424 2010年 [査読無し][通常論文]
  • 日本機械学会論文集(A編) 76 (764) 440 -442 2010年 [査読無し][通常論文]
  • Takashi Nakamura, Hiroyuki Oguma, Yuto Shinohara FATIGUE 2010 2 (1) 2121 -2129 2010年 [査読無し][通常論文]
     
    Very high cycle fatigue (VHCF) of high strength steel has become an important issue for mechanical engineers in recent years. In VHCF regime over 107 cycles, fatigue crack initiates not from surface but from sub-surface of materials. The sub-surface fractures even occur in a lower stress than surface-originating fractures; therefore, to clarify its mechanism is strongly needed for the safety use of high strength steel. In sub-surface fractures, a typical fracture surface with a fine concavo-convex pattern called "ODA" was discovered. To reveal the formation mechanism of ODA is regarded as a key point for sub-surface crack growth because it is never observed in surface-originating fractures. This study focuses on a special environment inside sub-surface crack. The sub-surface crack is not exposed to atmosphere and the adsorption of gaseous molecules on fresh-surface at crack tip seems to be negligible. With this in mind, fatigue crack growth tests in high vacuum were conducted to simulate sub-surface crack propagation, and fracture features were thoroughly investigated by SEM analyses. As a result, it was clarified that high vacuum is closely similar to the environment inside sub-surface crack, and is a necessary condition to form ODA in VHCF. (C) 2010 Published by Elsevier Ltd.
  • Fatigue crack propagation properties of Ti-6Al-4V in ultra high vacuum environment
    Proceedings of the European Conference of Fracture, ECF18, CD-ROM CD-R 2010年 [査読無し][通常論文]
  • Hiroyuki Shimamura, Takashi Nakamura POLYMER DEGRADATION AND STABILITY 95 (1) 21 -33 2010年01月 [査読無し][通常論文]
     
    The degradation of the mechanical properties of polyimide films was evaluated by means of tensile tests after exposure to a low earth orbit(LEO) environment. Polyimide films irradiated with atomic oxygen (AO), ultraviolet (UV) light, and electron beam (EB) rays using ground simulation facilities were also evaluated similarly and compared. In these experiments tensile stress (7.0 MPa or less) was applied to the samples in order to assess its effects on mechanical properties. The mechanical properties of the flight samples decreased concomitantly with increased exposure duration. The fracture surfaces exhibited characteristic radiated patterns initiating from the exposed surfaces which showed a rough texture. In the AO-irradiated samples the mechanical properties degraded and the surface texture developed as the AO fluence increased; similar fracture surfaces appeared in the flight samples. In contrast, UV and EB irradiation had little impact on mechanical properties. Based on these results, the eroded surfaces by AO irradiation served as the starting points of the rupture, resulting in degradation of mechanical properties of polyimide films exposed to a LEO environment. The tensile stress states induced no difference in evaluations. (C) 2009 Elsevier Ltd. All rights reserved.
  • Transactions of the Japan Society of Mechanical Engineers 76 (764) 428 -430 2010年 [査読無し][通常論文]
  • Transactions of the Japan Society of Mechanical Engineers 76 (764) 437 -439 2010年 [査読無し][通常論文]
  • Transactions of the Japan Society of Mechanical Engineers 76 (764) 434 -436 2010年 [査読無し][通常論文]
  • Transactions of the Japan Society of Mechanical Engineers 76 (764) 431 -433 2010年 [査読無し][通常論文]
  • Transactions of the Japan Society of Mechanical Engineers 76 (764) 404 -406 2010年 [査読無し][通常論文]
  • Transactions of the Japan Society of Mechanical Engineers 76 (764) 425 -427 2010年 [査読無し][通常論文]
  • Transactions of the Japan Society of Mechanical Engineers 76 (764) 422 -424 2010年 [査読無し][通常論文]
  • Transactions of the Japan Society of Mechanical Engineers 76 (764) 440 -442 2010年 [査読無し][通常論文]
  • Hiroyuki Shimamura, Takashi Nakamura POLYMER DEGRADATION AND STABILITY 94 (9) 1389 -1396 2009年09月 [査読無し][通常論文]
     
    Mechanical properties of polyimide films are degraded by exposure to a low earth orbit environment. The main environmental factor for that degradation is atomic oxygen (AO). Using tensile tests, AO-irradiated surface topography observations, and fracture surface analyses, this study investigated the degradation behavior of polyimide films' mechanical properties by increased AO fluence and its accompanying degradation mechanisms. Tensile strength and elongation of polyimide films were reduced concomitantly with increased AO fluence. Furthermore, AO-irradiated polyimide films fractured from the AO-irradiated surfaces, of which roughness became marked as AO fluence increased. These results reflect that reduction of mechanical properties is attributable to the roughness increase in AO-irradiated surfaces. Polyimide films coated with indium tin oxide (ITO) were also evaluated to confirm the degradation behavior of AO protective films. Surfaces of ITO-coated polyimide films remained smooth even after AO irradiation. However, undercut cavities were formed at ITO coating defect sites. Rupture of ITO-coated polyimide films initiates from the undercut cavities, engendering large reduction of tensile strength and elongation. The degradation of the mechanical properties of ITO-coated polyimide films increased substantially until the undercut cavities fully penetrated the film. (C) 2009 Elsevier Ltd. All rights reserved.
  • Effects of LEO environment on mechanical properties of PEEK films
    Proceedings of the 5th Japan-Taiwan Workshop on Mechanical and Aerospace Engineering (CD-ROM) B06 2009年 [査読無し][通常論文]
  • Effects of LEO Environment on Mechanical Properties of PEEK Films under Tensile Stress
    Proceedings of International Symposium on "SM/MPAC&SEED Experiment", JAXA Special Publication JAXA-SP-08-015E 73 -80 2009年 [査読無し][通常論文]
  • Hiroyuki Shimamura, Takashi Nakamura PROTECTION OF MATERIALS AND STRUCTURES FROM SPACE ENVIRONMENT 1087 75 -82 2009年 [査読無し][通常論文]
     
    Effects of atomic oxygen (AO) on mechanical properties of polyimide films were investigated using surface topography observations and tensile tests. The ITO-coated polyimide films, which are expected to have a high durability against AO attacks, were also evaluated. Surfaces of polyimide films irradiated by AO were deeply eroded, exhibiting a rough texture. The roughness developed as the AO fluence increased. Tensile strength and elongation of the polyimide films degraded after AO irradiation tests. In addition, that degradation became marked concomitantly with increased AO fluence. These results indicate that development of surface roughness can degrade mechanical properties of polyimide films. In contrast, surfaces of ITO-coated polyimide films remained flat and were hardly affected by AO irradiation. Nevertheless, the tensile strength and elongation of ITO-coated polyimide films were decreased by AO irradiation. Such degradation resulted from undercut cavities formed by AO erosion at the defects sites of ITO coating.
  • Proceedings of the 9th International Conference: Protection of Materials and Structures from Space Environment, AIP Conference Proceedings 1087 127 -136 2009年 [査読無し][通常論文]
  • Journal of Solid Mechanics and Materials Engineering 3 (3) 440 -448 2009年 [査読無し][通常論文]
  • 鋳造工学 81 (2) 63 -69 2009年 [査読無し][通常論文]
  • Effects of tempering temperature on very high cycle fatigue properties of high strength steel
    Proceedings of the International Conference of Fracture, ICF12 (CD-ROM) T12-068 2009年 [査読無し][通常論文]
  • J. JFS 81 (2) 63 -69 2009年 [査読無し][通常論文]
  • A. J. McEvily, T. Nakamura, H. Oguma, K. Yamashita, H. Matsunaga, M. Endo SCRIPTA MATERIALIA 59 (11) 1207 -1209 2008年12月 [査読無し][通常論文]
     
    A mechanism of fatigue crack advance involving the erosion of crack closure in vacuum is proposed to account for the very high cycle fatigue of Ti-6Al-4V. (c) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
  • Statistical Analysis of Very High Cycle Fatigue Property of High Carbon Chromium Bearing Steel in Rotating Bending
    Proceeding of the First Japan-China Joint Symposium on Fatigue of Engineering Materials and Structures 64 -67 2008年 [査読無し][通常論文]
  • Very High Cycle Fatigue Properties of High Strength Steel SNCM439 - Part 1: General Characteristics based on Round Robin Tests -
    Proceeding of the First Japan-China Joint Symposium on Fatigue of Engineering Materials and Structures 68 -71 2008年 [査読無し][通常論文]
  • Very High Cycle Fatigue Properties of High Strength Steel SNCM439 - Part 2: Influential Factors -
    Proceeding of the First Japan-China Joint Symposium on Fatigue of Engineering Materials and Structures 72 -75 2008年 [査読無し][通常論文]
  • Statistical duplex S-N characteristics of high carbon choromium bearing steel in rotating bending in very high cycle regime
    Proc. of the Materials Science & Technology 2008 Conference, MS&T'08, CD-ROM CD-ROM 2008年 [査読無し][通常論文]
  • Effects of vacuum like environment around interior crack on gigacycle fatigue properties
    Proceedings of the Materials Science & Technology 2008 Conference, MS&T'08,CD-ROM, (2008) CD-ROM,論文番号489561 2008年 [査読無し][通常論文]
  • 鋳造工学 80 (3) 170 -176 2008年 [査読無し][通常論文]
  • J. JFS 80 (3) 170 -176 2008年 [査読無し][通常論文]
  • 堀川 紀孝, 中村 孝, 荻内 佑季子, 東 宏行, 野口 徹 材料 56 (12) 1163 -1169 2007年 [査読無し][通常論文]
  • 中村孝, 山下亮平, 小熊博幸, 脇田実奈, 野口徹 材料 56 (12) 1111 -1117 2007年 [査読無し][通常論文]
  • Damping Properties of Giant Magnetostrictive Materials Fabricated by Powder Metallurgy
    Proceedings of the 4th Japan-Taiwan Workshop on Mechanical and Aerospace Engineering 217 -222 2007年 [査読無し][通常論文]
  • A Study of Interior Crack Growth Process on Ti-6Al-4V Simulated by High Vacuum Fatigue Tests
    Proceedings of the 4th Japan-Taiwan Workshop on Mechanical and Aerospace Engineering 332 -339 2007年 [査読無し][通常論文]
  • A Mechanism of Interior-Originating Fatigue of Ti-6Al-4V Based on Crack Growth Behavior in a High Vacuum
    Ti-2007, Science and Technology 2 1225 -1228 2007年 [査読無し][通常論文]
  • Noritaka HORIKAWA, Takashi NAKAMURA, Yukiko OGIUCHI, Hiroyuki AZUMA, Toru NOGUCHI Journal of the Society of Materials Science Japan 56 (12) 1163 -1169 2007年 [査読無し][通常論文]
  • Journal of the Society of Materials Science Japan 56 (12) 1111 -1117 2007年 [査読無し][通常論文]
  • H Nakamura, T Nakamura, T Noguchi, K Imagawa POLYMER DEGRADATION AND STABILITY 91 (4) 740 -746 2006年04月 [査読無し][通常論文]
     
    The photochemical reaction of poly(ether ether ketone) (PEEK) sheets under tensile loads has been investigated. Two types of UV irradiation tests were carried out in a vacuum environment: with and without a cooling apparatus. Chemical structures, thermal properties, and mechanical properties were measured to clarify photo-deterioration. Chemical analysis based on Fourier Transform Infrared Spectrometry (FT-IR) and X-ray Photoelectron Spectroscopy (XPS) showed photochemical scission caused by UV exposure. Thermal properties, measured by Differential Scanning Calorimetry (DSC), indicated that a crosslinking reaction occurred during the radiation tests. Tensile properties of PEEK sheets after UV radiation clearly showed a tendency to embrittlement affected not only by crosslinking but also by the orientation of molecular chains resulting from the temperature rise of the specimens. Furthermore, applied tensile stress during exposure accelerated molecular scission and disturbed the crosslinking effects of the tensile properties. (c) 2005 Elsevier Ltd. All rights reserved.
  • 中村 寛, 中村 孝, 野口 徹, 藤田 修, 今川 吉郎, 井上 利彦 日本機械学会論文集(A) 71 (710) 1327 -1332 2005年 [査読無し][通常論文]
  • T Noguchi, N Horlkawa, H Nagate, T Nakamura, K Sato INTERNATIONAL JOURNAL OF CAST METALS RESEARCH 18 (4) 214 -220 2005年 [査読無し][通常論文]
     
    This report examines an application of a flow-solidification simulation system in the cast-in insertion process. This process is effective for producing composite castings, but the bonding state is determined by thermal conditions at the interface, which alter the geometrical condition of the inserts and castings. The bonding state is estimated approximately by geometrical and thermal parameters. However, in practical applications, it is quite difficult to predict the bonding state over the whole interface area. This report applies a How-solidification simulation system, combined with criteria the authors have established previously, to estimate the bonding state and to optimise the shape and size of insert/casting/gating systems. Several types of gates and insertion settings were examined and bonding and uniformity compared. The effects of the temperature distribution during pouring on the bonding states and ways to optimise the gating system are also discussed. Application of the process to automobile components is also described.
  • Damage Properties of PEEK Films Irradiated by Atomic Oxygen
    Key Engineering Materials 261-263 1617 -1622 2004年 [査読無し][通常論文]
  • JSME International Journal, Ser.A. 47 (3) 365 -370 2004年 [査読無し][通常論文]
  • The Effect of Defect Sizes on Initial Crack Propagations of Ti-6Al-4V in High Vacuum Environment
    Proc. of the 3rd Int. Conf. on Very High Cycle Fatigue VHCF-3 569 -576 2004年 [査読無し][通常論文]
  • The Effect of Stress Ratios on Very High Cycle Fatigue Properties of Ti-6Al-4V
    Key Engineering Materials 261-263 1227 -1232 2004年 [査読無し][通常論文]
  • Development of a Compact Digital Servo Testing Machine for Very High Cycle Fatigue
    Proc. of the 3rd Int. Conf. on Very High Cycle Fatigue VHCF-3 499 -505 2004年 [査読無し][通常論文]
  • The Space Exposure Experiment of Tension Loaded PEEK Sheets Utilizing the International Space Station
    Proceedings of the 24th International Symposium on Space Technology and Science (Selected Paper) 756 -759 2004年 [査読無し][通常論文]
  • A Fractographic Comparison Between Fatigue Crack Propagation of Surface-originating Fractures in Vacuum and Interior-originating Fractures on High Strength Steel
    Proc. of the 3rd Int. Conf. on Very High Cycle Fatigue VHCF-3 48 -55 2004年 [査読無し][通常論文]
  • Charecteristics of Initial Fatigue Crack Propagation Process of Ti-6Al-4V in Very High Cycle Fatigue
    Proc. of the 3rd Int. Conf. on Very High Cycle Fatigue VHCF-3 201 -208 2004年 [査読無し][通常論文]
  • 椎名貴弘, 中村孝, 野口徹 日本機械学会論文集(A) 70 (696) 1042 -1049 2004年 [査読無し][通常論文]
  • 小熊博幸, 中村孝, 横山秀治, 野口徹 日本機械学会論文集(A) 70 (696) 1116 -1123 2004年 [査読無し][通常論文]
  • Influential Factors on Interior-Originating Fatigue Fractures of Ti-6Al-4V in Gigacycle Region: Focusing on Stress Ratio and Internal Environment of Material
    Ti-2003, Science and Technology 3 1775 -1782 2003年 [査読無し][通常論文]
  • N Horikawa, T Ito, T Noguchi, T Nakamura INTERNATIONAL JOURNAL OF CAST METALS RESEARCH 16 (1-3) 365 -369 2003年 [査読無し][通常論文]
     
    In the cast-in insertion process, the thermal conditions necessary for good bonding have been estimated by volume ratio. However, even with the same volume ratio, the bonding state varies with the size of the insert and the casting as well as with the location of the insert in the casting. Estimates of the effects of these geometrical conditions are useful to improve ease and reliability of this process. This study performed solidification analysis together with experiments to explain the size effect in cast-in insertion, and the results are discussed and compared. The model used in the study is a hollow cylindrical ductile iron casting and a mild steel ring insert located at the bottom of the cylinder. The standard size is about 80mm in diameter and height, and the scale was varied from 0.33 to 3 times the standard size for three volume ratios, 20, 25, and 30. The periods where the insert is in contact with liquidus melt (liquidus period) obtained by calculations were compared as the thermal condition. The calculations showed that, the liquid contact time is longer for larger sizes until about twice the standard size, but that it then decreases rapidly with even larger sizes. This is because the thick solidified layer formed by the large cooling effect of the insert does not remelt. Large size is not always advantageous to good bonding, and it is necessary to choose volume ratios suitable to the size of a casting.
  • 堀川 紀孝, 加野 潤二, 野口 徹, 中村 孝 鋳造工学 75 (2) 95 -101 2003年 [査読無し][通常論文]
  • 椎名 貴弘, 中村 孝, 野口 徹, 細川 冬樹 日本機械学会論文集(A編) 69 (678) 404 -411 2003年 [査読無し][通常論文]
  • Ti-6Al-4V合金の超高サイクル疲労特性に及ぼす応力比の影響
    構造物の安全性および信頼性Vol.5 JCOSSAR2003論文集 413 -418 2003年 [査読無し][通常論文]
  • The Degradation of PEEK Sheets Accelerated by Stress in a Real Space Environment Based on the Space Exposure Experiment
    Proceedings of the International Conference on Advanced Technology in Experimental Mechanics, ATEM, (CD-ROM) W0339 2003年 [査読無し][通常論文]
  • Effects of High Vacuum Environment on High Cycle Fatigue Properties of Ti-6Al-4V alloy
    Proceedings of the International Conference on Advanced Technology in Experimental Mechanics, ATEM, CD-ROM W0355 2003年 [査読無し][通常論文]
  • 寿命分布特性からみた超高サイクル疲労の特徴
    構造物の安全性および信頼性Vol.5 JCOSSAR2003論文集 423 -426 2003年 [査読無し][通常論文]
  • 中村孝, 泉谷仁, 椎名貴弘, 小熊博幸, 野口徹 材料 52 (11) 1280 -1284 2003年 [査読無し][通常論文]
  • 小熊博幸, 中村孝, 横山秀治, 野口徹 材料 52 (11) 1298 -1304 2003年 [査読無し][通常論文]
  • The Effect of Microstructures on Interior-Originating Fatigue Fractures of Ti-6Al-4V in Gigacycle Region
    Ti-2003, Science and Technology 3 1783 -1790 2003年 [査読無し][通常論文]
  • 椎名貴弘, 中村孝, 野口徹, 細川冬樹 材料 51 (6) 673 -680 2002年 [査読無し][通常論文]
  • Gigacycle Fatigue Properties of Ti-6Al-4V Under Uniaxial Tension
    Proceedings of the 8th International Fatigue Congress FATIGUE’99 5 2971 -2978 2002年 [査読無し][通常論文]
  • The Effect of Atomosphere, High Vacuum, and Inner Environment of Materials on Surface and Interior Originating Fatigue Fractures of High strength Steel
    Proceedings of the 8th International Fatigue Congress FATIGUE’99 4 2517 -2524 2002年 [査読無し][通常論文]
  • T Noguchi, J Kano, K Noguchi, N Horikawa, T Nakamura INTERNATIONAL JOURNAL OF CAST METALS RESEARCH 13 (6) 363 -371 2001年 [査読無し][通常論文]
     
    Insertion bonding of mild steel and titanium pipes in aluminium castings was performed in two ways; either by holding paired pipe and aluminium cylinder specimens at constant high temperatures, or by pouring molten aluminium into sand moulds containing inserts. The surfaces of the inserts were electroplated using Ag or Au, or spray coated with Al-Si alloy. The bonding was evaluated by shear strength measurements and microstructure observations. To verify the effect of surface coatings, the contact between the molten aluminium and the specimens was observed. At constant high temperatures, coated steels showed good metallurgical bonding when they were maintained for about 200 s in contact with molten aluminium. The time necessary for bonding was shorter with titanium inserts. In bonded specimens, alloyed microstructures were observed at the interfaces. There was no bonding with uncoated specimens. All coatings used were effective when poured, but preheating of the moulds was necessary to allow sufficient solidification time for the melt/insert volume ratios which were 32 and 36, Process analysis by the finite difference method showed that bonding required a period of liquid phase contact of the melt with the inserts. Observation of aluminium droplet contact with the inserts showed that uncoated surfaces of steel and titanium are not wetted by the melt due to stable oxide skins. With Ag electroplating, aluminium droplets can make wet contact with the specimens. The contact angle decreased from about 140 degrees in uncoated specimens to 15 degrees -45 degrees with Ag plating. The plating prevents surface oxidation of the inserts and promotes wet contact when the active aluminium liquid surface is exposed. The Al-Si alloy spray coating has some effect in promoting wettability, but it is inferior to Ag plating.
  • 材料 50 (10) 1074 -1079 2001年 [査読無し][通常論文]
  • Space Exposure Experiment of PEEK Sheets Under a Tensile Load Utilizing an International Space Station
    Proc. of the First Taiwan-Japan Workshop on Mechanical and Aerospace Engineering 1 107 -113 2001年 [査読無し][通常論文]
  • 中村孝, 金子真, 風見志郎, 野口徹 材料 49 (10) 1148 -1154 2000年 [査読無し][通常論文]
  • 酒井 達雄, 武田 光弘, 塩澤 和章, 越智 保雄, 中島 正貴, 中村 孝, 小熊 規泰 材料 49 (7) 779 -785 2000年 [査読無し][通常論文]
  • T Noguchi, K Shimizu, N Takahashi, T Nakamura WEAR 231 (2) 301 -309 1999年07月 [査読無し][通常論文]
     
    Repeated drop tests were performed on Ni-hard and high-Cr cast iron grinding balls with material toughness varied by heat treatment. Instrumented impact tests and bending fatigue tests were also performed on bar specimens with the same heat treatment, and correlation between drop strength and other strength characteristics were discussed. In the drop tests from various heights, balls fractured by breakage or spalling, with longer life (Nf) at lower drop heights (H) giving H-Nf curves similar to the S-N curves in fatigue tests. Experiments show that drop strength correlated better with fatigue strength and hardness than with impact toughness (K-Id) in both irons. The stress causing spalling by repeated drops was inferred to be repeated contact stress, and internal tensile stress caused by surface plastic deformation assists the fracture. Breakage from the bail center is caused by cyclic tensile radial stress by impact body force, and is assisted by residual casting stress. Breakage type fracture is possible in as cast or very brittle balls, and with drops from high heights. (C) 1999 Elsevier Science S.A. All rights reserved.
  • The effect of high vacuums on surface and interior originated fatigue fractures in Ti-6Al-4V
    T Nakamura, T Noguchi, M Kaneko, S Kazami FATIGUE '99: PROCEEDINGS OF THE SEVENTH INTERNATIONAL FATIGUE CONGRESS, VOLS 1-4 4 2365 -2370 1999年 [査読無し][通常論文]
     
    Uniaxial tension fatigue tests of Ti-6Al-4V were conducted in vacuum and air environments. S-N curves were determined by the competition of fractures originating on the surface under high stress and fractures originating in the interior under low stress. The vacuum environment improved the fatigue life of surface fractures, but had no effect on interior fractures. A clear difference was shown in the fracture surfaces of fractures originating on the surface between the environments. Clear slip marks were observed in air, but in the vacuum they were unclear, and rebonding of crack surfaces may have occurred. There was no difference in the fracture surfaces of fractures originating in the interior between the environments, and they resembled surface fractures in the vacuum. The-influence of the internal condition of material on crack propagation was considered to be similar to that of the vacuum environment.
  • Experimental evidence of duplex S-N characteristic's in wide life region for high strength steels
    T Sakai, M Takeda, K Shiozawa, Y Ochi, M Nakajima, T Nakamura, N Oguma FATIGUE '99: PROCEEDINGS OF THE SEVENTH INTERNATIONAL FATIGUE CONGRESS, VOLS 1-4 1 573 -578 1999年 [査読無し][通常論文]
     
    High strength steels and surface hardened steels indicate characteristic fatigue behavior such that S-N curve tends to come down again in the long life region of N>10(7). From a viewpoint of safety design of machines and structures, it is important to clarify such a characteristic S-N property of each component material. In this study, gigacycle fatigue tests were systematically performed by means of same type of six testing machines and same type of specimens of high carbon chromium steel for the use of bearing. Experimental data thus obtained were pooled altogether and a duplex S-N property in wide life region was confirmed.
  • The effect of fabrication processes on strength properties of GMM
    T Nakamura, T Noguchi EXPERIMENTAL MECHANICS, VOLS 1 AND 2 1039 -1043 1998年 [査読無し][通常論文]
     
    The influence of fabrication processes on static and fatigue strength properties of Giant Magnetostrictive Materials were investigated. Test results with Bridgman materials (BM) and powder metallurgy materials (PM) showed: (1) Compression strength of PM was about 2/3 of BM, and the strength scatter of PM was much smaller than BM. The smaller compression strength can be explained by the porosity of PM, and the smaller strength scatter by the microstructure anisotropy of BM. (2) Radial compression strength was about ii 20 of the compression strength. (3) Both kinds of materials showed stress dependence on Young's modulus especially at low stresses, and this may be considered a Delta E effect. At high stresses Young's modulus of PM showed about 3/4 of BM because of its porosity. (4) There was an apparent fatigue limit at 60% of the compression strength. This ratio is almost the same in both kinds of materials so fatigue Limits can be evaluated by static strengths.
  • Fatigue Life Characteristics of T-6Al-4V Alloy in Very High Cycle Region
    Proceedings of the 11th International Conference on Experimental Mechanics 1117 -1120 1998年 [査読無し][通常論文]
  • 中村 孝, 野口 徹, 山口 篤, 中林 正史 日本機械学会論文集(A編) 64 (627) 2819 -2825 1998年 [査読無し][通常論文]
  • 中村 孝, 金子 真, 野口 徹, 神保 勝久 日本機械学会論文集(A編) 64 (623) 1820 -1825 1998年 [査読無し][通常論文]
  • 材料 47 (12号) 1216 -1220 1998年 [査読無し][通常論文]
  • 野口 徹, 佐伯 彰一, 島崎 敏樹, 高橋 典夫, 中村 孝 鋳造工学 68 (9) 739 -745 1996年 [査読無し][通常論文]
  • 中村 孝, 金子 真, 田辺 智明, 神保 勝久, 永井 文雄 日本機械学会論文集(A) 61 (582) 441 -446 1995年 [査読無し][通常論文]
  • ADI材における疲労き裂起点の√area分布を用いた寿命分布の推定
    日本機械学会論文集(A) 60 (570) 305 -308 1994年 [査読無し][通常論文]
  • FATIGUE-STRENGTH OF AUSTEMPERED DUCTILE IRON CYLINDERS SUBJECTED TO REPEATED INTERNAL-PRESSURE
    T NAKAMURA, K KISHIMA, K JINBO, Y MATSUO, F NAGAI JSME INTERNATIONAL JOURNAL SERIES A-MECHANICS AND MATERIAL ENGINEERING 36 (4) 348 -353 1993年10月 [査読無し][通常論文]
     
    We carried out a repeating internal pressure test on a thin-wall cylinder of austempered ductile iron (ADI) which has been noted for its good combination of high static strength and elongation. We examined the effect of the austempering and surface hardening treatments by means of roller burnishing, which affects fatigue strength. For the lathe turned specimen (not roller burnished), the fatigue life of ADI was longer than that of the as-cast sample at a high pressure. But this difference of fatigue life became less clear with decreasing pressure. At the lowest pressure, most of the specimens were unfractured at 1 X 10(7) cycles; the fatigue life of the ADI sample was shorter than that of the as-cast specimen. On the other hand, for a roller burnished specimen, the fatigue life of ADI was longer than that of the as-cast specimen at all pressures. After the scanning electron microscopic (SEM) observation of the surface, it was clarified that most of the fracture origins were 0.1 approximately 0.15 mm casting defects.
  • 浦井 隆宏, 杉山 高洋, 中村 孝, 神保 勝久 日本機械学会論文集(C) 59 (563) 2112 -2115 1993年 [査読無し][通常論文]
  • 中村 孝, 菅野 明弘, 神保 勝久, 永井 文雄 日本機械学会論文集(A) 59 (568) 2817 -2824 1993年 [査読無し][通常論文]
  • 中村 孝, 東郷 善之, 神保 勝久, 永井 文雄 日本機械学会論文集(A) 59 (567) 2487 -2494 1993年 [査読無し][通常論文]
  • Mechanism of Very High Cycle Fatigue Behavior on Austempered Ductile Iron (General Characteristics of Fatigue Life Distributions)
    Proceedings of the International Conference on Mechanical Behavior of Ductile Cast Iron and Other Cast Metals 178 -183 1993年 [査読無し][通常論文]
  • Mechanism of Very High Cycle Fatigue Behavior on Austempered Ductile Iron (Mechanism)
    Proceedings of the International Conference on Mechanical Behavior of Ductile Cast Iron and Other Cast Metals 184 -189 1993年 [査読無し][通常論文]
  • 中村 孝, 木島 公一朗, 神保 勝久, 加藤 直, 松尾 陽太郎, 永井 文雄 日本機械学会論文集(A) 58 (549) 683 -687 1992年 [査読無し][通常論文]
  • 中村 孝, 川上 充郎, 神保 勝久, 松尾 陽太郎, 永井 文雄 日本機械学会論文集(A) 58 (555) 2046 -2050 1992年 [査読無し][通常論文]
  • 中村 孝, 浦井 隆宏, 岩堀 正, 神保 勝久, 永井 文雄, 松尾 陽太郎 日本機械学会論文集(A) 55 (510) 198 -204 1989年 [査読無し][通常論文]
  • 浦井 隆宏, 中村 孝, 神保 勝久, 永井 文雄, 松尾 陽太郎 日本機械学会論文集(A) 55 (511) 460 -466 1989年 [査読無し][通常論文]
  • 赤城 協, 神保 勝久, 中村 孝, 浦井 隆宏, 永井 文雄, 松尾 陽太郎 材料 36 (408) 1005 -1011 1987年 [査読無し][通常論文]

特許

  • 材料試験機の試験片把持構造
    4468118
  • 疲労試験機
    4172544
  • 疲労試験機
    特開2002-243606
  • Fatigue Testing Machine
    4172544
  • Fatigue Testing Machine
    特開2002-243606

受賞

  • 2010年 日本鋳造工学会平成21年度優秀論文賞
  • 1999年 日本材料学会平成10年度学術奨励賞

共同研究・競争的資金等の研究課題

  • 高分子材料の宇宙環境強度
    受託研究
    研究期間 : 2001年
  • 高強度材料の超高サイクル疲労破壊機構
    科学研究費補助金
    研究期間 : 1989年

教育活動情報

主要な担当授業

  • Materials for Space Structure(宇宙材料学E)
    開講年度 : 2018年
    課程区分 : 修士課程
    開講学部 : 工学院
  • 宇宙材料学特論
    開講年度 : 2018年
    課程区分 : 修士課程
    開講学部 : 工学院
    キーワード : ロケット、スペースプレーン、ターボポンプ、極低温、高温、原子状酸素、紫外線、電子線、宇宙環境
  • 材料強度学特論
    開講年度 : 2018年
    課程区分 : 修士課程
    開講学部 : 工学院
    キーワード : 破損の法則,欠陥,亀裂,応力拡大係数,破壊靭性,疲労,クリープ,応力腐食割れ
  • Materials for Space Structure(宇宙材料学E)
    開講年度 : 2018年
    課程区分 : 博士後期課程
    開講学部 : 工学院
  • 宇宙材料学特論
    開講年度 : 2018年
    課程区分 : 博士後期課程
    開講学部 : 工学院
    キーワード : ロケット、スペースプレーン、ターボポンプ、極低温、高温、原子状酸素、紫外線、電子線、宇宙環境
  • 材料強度学特論
    開講年度 : 2018年
    課程区分 : 博士後期課程
    開講学部 : 工学院
    キーワード : 破損の法則,欠陥,亀裂,応力拡大係数,破壊靭性,疲労,クリープ,応力腐食割れ
  • 機械材料工学
    開講年度 : 2018年
    課程区分 : 学士課程
    開講学部 : 工学部
    キーワード : 状態図、熱処理、強度、材料試験、鉄鋼材料、非鉄金属材料
  • 機械加工学実習
    開講年度 : 2018年
    課程区分 : 学士課程
    開講学部 : 工学部
    キーワード : 鋳造、溶接、塑性加工、切削加工、研削加工、先端加工


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