研究者データベース

高橋 航圭(タカハシ コウスケ)
工学研究院 機械・宇宙航空工学部門 機械材料システム
准教授

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

  • 准教授

学位

  • カリフォルニア大学ロサンゼルス校
  • Ph.D. in mechanical engineering

ホームページURL

J-Global ID

研究キーワード

  • 材料強度学   破壊力学   接着・接合   複合材料   

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

  • 2016年03月 - 現在 北海道大学 准教授
  • 2011年07月 - 2016年02月 東京工業大学 助教

学歴

  • 2008年09月 - 2011年06月   カリフォルニア大学ロサンゼルス校   機械工学専攻
  • 2006年04月 - 2008年03月   東京工業大学大学院   理工学研究科機械物理工学専攻
  • 2000年04月 - 2006年03月   東京工業大学   工学部機械宇宙学科

所属学協会

  • 日本接着学会   日本複合材料学会   日本材料学会   日本機械学会   

研究活動情報

論文

  • Bending Deformation of Multiple Aligned Plates Toward Coalescence Induced by Capillarity
    高橋 航圭
    Journal of Microelectromechanical Systems 28 4 685 - 694 2019年05月 [査読有り][通常論文]
  • 高橋 航圭, 深澤 大志, 和久井 航太, TRIAWAN Farid, 因幡 和晃, 岸本 喜久雄, 橋村 徹
    日本機械学会論文集 84 865 18 - 00137-18-00137 一般社団法人 日本機械学会 2018年09月 [査読有り][通常論文]
     
    <p>Weld-joint has been atracting attention to assemble structures of dissimilar metals, particularly in automobile industry. However, the application of weld-joint to steel and aluminum plates is still limited due to uncertainty of the fatigue strength. Fatigue strength of weld-joint is rather complicated to evaluate because both effects of stress concentration at the edge and formation of intermetallic compounds along the interface should be considered carefully. This study focused on finding the key factor that determines the fatigue strength of steel-aluminum brazing joint by considering the variation of strength along interface. The welded part of single lap joint was partially removed by a wire-cut electric discharge machine to investigate the influence of length and location of interface on fatigue strength. When the applied load was relatively low it was found that the numbers of cycles to failure were found to be similar, even though the lengths of interface were different due to partial removal. Furthermore, observation on the fracture surface indicated that early stage of crack propagation showed similar topography regardless of the partial removal of weld part. These results clarified that the number of cycles to failure was mainly consumed at the early stage. Finite element analysis was then conducted to investigate the stress component affecting the fatigue strength. As a result, principal stresses were maximum at the fracture initiation site in all the specimens. Therefore, we concluded that fatigue life of weld-joint is dominant in the early stage of crack propagation, which is characterized by the principal stress.</p>
  • 藤村 奈央, 西塚 祐斗, 髙橋 航圭, 中村 孝
    日本機械学会論文集 84 864 18 - 00206-18-00206 一般社団法人 日本機械学会 2018年 [査読有り][通常論文]
     
    <p>To quantitatively investigate the cause of the changes in arithmetic mean roughness <i>R<sub>a</sub></i> of austenitic stainless steel under low-cycle fatigue loading, precise observation focusing on slip bands was conducted on SUS316NG. During the loading, the specimen's surface topography was regularly measured using a laser microscope. The topography was then characterized by frequency analysis to identify the surface reliefs due to persistent slip bands (PSBs), and their heights were measured. The heights increased with the usage factor (<i>UF</i>). The amount of the increase with respect to <i>UF</i> increased with the strain range. These tendencies are similar to those for <i>R<sub>a</sub></i>. A comparison between <i>R<sub>a</sub></i> and the heights of surface reliefs caused by PSBs showed that the values were strongly correlated. The number of PSBs formed on the surface was estimated from the area ratio of PSBs. The area ratio increased with <i>UF</i>, which is similar to the relationship for <i>R<sub>a</sub></i>. A comparison between <i>R<sub>a</sub></i> and the area ratio showed that these values were also strongly correlated. The product of the height due to PSBs and the area ratio was calculated and it was compared with <i>R<sub>a</sub></i>. As a result, the product was in good agreement with <i>R<sub>a</sub></i>. Consequently, the surface texture parameter <i>R<sub>a</sub></i> represent both the change in the height and the number of surface reliefs due to PSBs.</p>
  • HIBI Masaharu, TRIAWAN Farid, INABA Kazuaki, TAKAHASHI Kosuke, KISHIMOTO Kikuo, HAYABUSA Keisuke, NAKAMOTO Hiroaki
    Mechanical Engineering Journal 5 1 17 - 00151-17-00151 一般社団法人 日本機械学会 2018年 [査読有り][通常論文]
     
    <p>In turbomachinery, such as turbine, pump, and valve, components damage caused by collapsing cavitation bubbles has been a critical issue that needs a proper solution. For this reason, investigation on the cavitation erosion behavior of materials as well as the life prediction techniques has been extensively conducted. Moreover, a number of repairing techniques, such as by a surface coating of polymeric materials, has been established. However, in real operation, cavitation is actually not the only load acquired by the components. Other external loads, such as centrifugal force and hydraulic pressure, may also affect the generation of damage. Therefore, its effect on the lifetime needs to be considered carefully. In this paper, the behavior of cavitation damage of epoxy resin specimens subjected to uniaxial tensile loading is reported. A self-developed testing device was used to conduct a cavitation test based on ASTM G32 while at the same time exerting a constant uniaxial tensile load to the specimen. Using this device, various levels of tensile stress effect on the cavitation damage was examined. As a result, besides erosion damage, we revealed that the specimens demonstrated fracture when a certain tensile load was applied. Furthermore, as the tensile load was increased, the time to fracture was shortened significantly, indicating the pronounced effect of tensile stress on the damage formation. The crack growth mechanism was then analyzed by fractography. The result indicated that the crack propagation under a mixed condition of cavitation and tensile loads was most likely driven by the combination of creep deformation and fatigue-like crack growth. Finally, a mathematical relationship between tensile stress and cavitation damage life was proposed. The relationship is important to enhancing the existing theory of cavitation damage evaluation in e.g. turbomachinery application.</p>
  • Tomohisa Kojima, Kazuaki Inaba, Kosuke Takahashi, Farid Triawan, Kikuo Kishimoto
    Journal of Pressure Vessel Technology 139 3 031308  2017年06月 [査読有り][通常論文]
     
    A theoretical model for wave propagation across solid-fluid interfaces with fluid-structure interaction (FSI) was explored by conducting experiments. Although many studies have been conducted on solid-solid and fluid-fluid interfaces, the mechanism of wave propagation across solid-fluid interfaces has not been well examined. Consequently, our aim is to clarify the mechanism of wave propagation across a solid-fluid interface with the movement of the interface and develop a theoretical model to explain this phenomenon. In the experiments conducted, a free-falling steel projectile was used to impact a solid buffer placed immediately above the surface of water within a polycarbonate (PC) tube. Two different buffers (aluminum and polycarbonate) were used to examine the relation between wave propagation across the interface of the buffer and water and the interface movement. With the experimental results, we confirmed that the peak value of the interface pressure can be predicted via acoustic theory based on the assumption that projectile and buffer behave as an elastic body with local deformation by wave propagation. On the other hand, it was revealed that the average profile of the interface pressure can be predicted with the momentum conservation between the projectile and the buffer assumed to be rigid and momentum increase of fluid. The momentum transmitted to the fluid gradually increases as the wave propagates and causes a gradual decrease in the interface pressure. The amount of momentum was estimated via the wave speed in the fluid-filled tube by taking into account the coupling of the fluid and the tube.
  • 藤村 奈央, 中村 孝, 髙橋 航圭, 和島 達希
    材料試験 66 12 906 - 912 公益社団法人 日本材料学会 2017年 [査読有り][通常論文]
     
    <p>A new surface modification technique, scanning cyclic press (SCP), was developed. SCP scans a metal surface with a vibrating indenter under precise loading control based on servo fatigue testing machine and can apply a variable cyclically compressive load. This study applied SCP to magnesium alloy AZ31 to investigate the effect on fatigue properties. After applying SCP, the surfaces of specimens were observed by using a laser scanning microscope and uniaxial push-pull fatigue tests were conducted. As a result, surface roughness of SCP-treated specimens slightly increased; however, the fatigue life became longer than that of untreated specimens. To clarify the reason for the improvement effect, fracture surfaces of the specimens were investigated in detail on the basis of SEM observation. SEM observation showed differences between the fracture surfaces of the untreated and SCP-treated specimens. The origin of fracture was at the surface in the untreated specimen. In the SCP-treated specimen, however, the fracture origins were sub-surface and a band-like layer just beneath the surface was observed on fracture surface, whereas the layer did not exist on that of untreated specimen. The surface hardness of SCP-treated specimen increased to almost twice as much after applying SCP. The result suggests that SCP modified surface layer of specimen and this layer suppressed crack initiation from surface.</p>
  • WAVE PROPAGATION ACROSS THE INTERFACE OF FLUID-STRUCTURE INTERACTION WITH VARIOUS SURFACE CONDITIONS OF SOLID MEDIUM
    Tomohisa Kojima, Kazuaki Inaba, Kosuke Takahashi
    PROCEEDINGS OF THE ASME PRESSURE VESSELS AND PIPING CONFERENCE, 2016, VOL 4 2017年 [査読有り][通常論文]
     
    This study aims to clarity the effect of surface conditions of solid on wave propagation at solid-fluid interface with fluid structure interaction. Although many studies have been done to develop the theoretical models of fluid-structure interaction caused by wave propagation, they do not take into account the surface conditions of the solid medium on the solid-fluid interface where interaction occurs. In this study, we experimentally investigated the wave propagation across the solid-fluid interface with several value of surface wettabilities and roughnesses of solid. We conducted an impact experiment with a free-falling projectile which hit the cylindrical solid buffer placed on top of the water surface within the elastic tube standing on the ground. During the experiments, cavitation bubbles were generated from the interface of the buffer and water That generation was inhibited according to the decrease of the value of the contact angle (improve of the wettability) of the buffer surface. The amplitude of transmitted pressure wave from the buffer to water become smaller than the theoretical value according to the decrease of the value of the contact angle on the buffer surface (the smallest value was 55% of the theoretical value). Concerning the surface roughness, the amplitude of transmitted pressure wave becomes smaller than the theoretical value according to the shape of the buffer surface become more different from flat surface (the smallest value was 75% of the theoretical value). These experimental results indicate that by taking into account the surface condition of the solid on the interface, more accurate model of fluid-structure interaction or ways to reduce the damage of structures by fluid-structure interaction would be proposed.
  • Bentang Arief Budiman, Kosuke Takahashi, Kazuaki Inaba, Kikuo Kishimoto
    COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING 90 211 - 217 2016年11月 [査読有り][通常論文]
     
    This paper presents a measurement technique of interfacial strength considering non-rigid bonding on a fiber/matrix interface modeled as a cohesive surface. By focusing on the stress concentration near a fiber crack obtained from a single-fiber fragmentation test, the stress contours in matrix observed by photoelasticity can be related to the interfacial strength by defining a characteristic length. An equation expressing the relationship between the characteristic length on the stress contour and the interfacial strength was derived, and validated using finite element analysis. The primary advantage of proposed measurement technique is that only a single fiber crack, which usually occurs within elastic deformation of matrix, is required for the evaluation of interfacial strength, whereas saturated fiber fragmentation is necessary in the conventional method. Herein, a sample application was demonstrated using a single carbon fiber and epoxy specimen, and an average interfacial strength of 23.8 MPa was successfully obtained. (C) 2016 Elsevier Ltd. All rights reserved.
  • Kosuke Takahashi, Yuichiro Yamagata, Kazuaki Inaba, Kikuo Kishimoto, Shiori Tomioka, Toshio Sugizaki
    LANGMUIR 32 14 3525 - 3531 2016年04月 [査読有り][通常論文]
     
    The adhesive force generated by a small short-term pressure, called tack, is measured by a probe tack test on pressure-sensitive adhesives (PSAs); the maximum force is evaluated by cavity growth at the interface between the PSA layer and the probe surface. As the PSA layer becomes thinner, it is more difficult to measure the tack with a cylindrical probe because of the uneven contact resulting from misalignment. A spherical probe is preferable to obtain reproducible contact on 5 the PSA layer, but the contact area should be taken into account if the contact pressure affects the tack performance. Tack was measured on PSAs with various thicknesses in different contact areas to clarify their effect. The results showed that a larger contact area on a thinner PSA generated higher adhesive stress with larger strain. It was found that the maximum adhesive stress was not affected by the contact pressure, but it was strongly correlated to the contact radius divided by the PSA thickness. In addition, a video microscope observation showed that, in all of the experimental cases, the adhesive stress always reached the maximum when cavities were generated at the interface between the PSA and probe surface. Therefore, the criterion of cavity growth was introduced for the evaluation of the maximum adhesive stress. As a result, the experimental results, even at different release rates, were in good agreement with the estimation by considering the effect of confining a thin layer. Furthermore, the theoretical estimation indicated the ultimate value, which was not dependent upon the PSA thickness or contact area. It was defined as a material property, referred to as the "ultimate tack strength" of PSAs.
  • 森重直樹, 森重直樹, 高橋航圭, 因幡和晃, 岸本喜久雄
    日本機械学会論文集(Web) 82 841 ROMBUNNO.16‐00194(J‐STAGE)  2016年 [査読有り][通常論文]
  • Kosuke TAKAHASHI, Takahiro MATSUO, Masakazu FURUTA, Shuzo OSHIMA, Kazuaki INABA, Kikuo KISHIMOTO
    Mechanical Engineering Letters 2 0 16  Japan Society of Mechanical Engineers 2016年 [査読有り][通常論文]
  • 高橋 航圭, 熊谷, 理 勝山, 優一郎, 因幡, 和晃, 岸本, 喜久雄, 山田, 幹典谷中, 雅顕
    日本機械学会論文集 82 833 2016年 [査読有り][通常論文]
  • Tomohisa Kojima, Kazuaki Inaba, Kosuke Takahashi
    Proceedings of the ASME 2015 Pressure Vessels and Piping Conference (PVP2015) Vol.5 PVP2015-45752 pp.1 - 10 2015年07月 [査読有り][通常論文]
  • Kosuke Takahashi, Kensuke Namiki, Takahiro Fujimura, Eun-Beom Jeon, Hak-Sung Kim
    COMPOSITES PART B-ENGINEERING 76 167 - 173 2015年07月 [査読有り][通常論文]
     
    The electrical-resistance-change method (ERCM) is a potential smart-sensing technique for carbon-fiber-reinforced plastic (CFRP) structures. However, a practical way to fabricate electrodes on CFRP structures, such as ink-jet printing with metal nano-inks, is necessary to reduce the time required for the process. As metal nano-inks can be sintered in a few milliseconds under ambient conditions using white-flash-light irradiation from a xenon lamp, the parameters of flash-light sintering such as light energy, duration, and number of pulses were investigated. The light intensity, which is the light energy divided by duration, was found to be an indicator of whether low electrical resistance was attained along with strong adhesion to the CFRP plate. The contact resistance between the electrode and CFRP plate was also examined in a tensile test to confirm the durability. The electrode sintered by flash light with the properly selected parameters exhibited high quality and strain monitoring capability. (C) 2015 Elsevier Ltd. All rights reserved.
  • Eun-Beom Jeon, Takahiro Fujimura, Kosuke Takahashi, Hak-Sung Kim
    COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING 66 193 - 200 2014年11月 [査読有り][通常論文]
     
    An addressable conducting network (ACN) enables the structural condition to be monitored by the electrical resistance between electrodes on surface of CFRP (carbon fiber reinforced polymer) structure. To improve the reliability of ACN for damage detection, the contact resistance between the electrodes and CFRP laminates needs to be minimized. In this paper, the silver nanoparticles electrodes were fabricated via printed electronics techniques on CFRP composite. The contact resistance between the silver electrodes and CFRP was measured with respect to various fabrication conditions such as the sintering temperature of silver nanoink and the surface roughness of CFRP laminates. The interfaces between silver electrode and carbon fibers were observed using scanning electron microscope (SEM). From the study, it was found that the lowest contact resistance of 0.3664 Omega could be achieved when the sintering temperature of the silver nanoink and surface roughness were 120 degrees C and 230 nm, respectively. (C) 2014 Elsevier Ltd. All rights reserved.
  • Rehana Afrin, Atsushi Ikai, Kosuke Takahashi, Kazuaki Inaba, Kikuo Kishimoto
    MOLECULAR CRYSTALS AND LIQUID CRYSTALS 603 1 157 - 164 2014年11月 [査読有り][通常論文]
     
    Adhesive properties of several serum proteins to the hemodialysis membrane surface previously studied by atomic force microscopy were compared with a more general case of adhesion/de-adhesion process of adhesive tapes and films. The three different tapes and film samples showed de-adhesion curves with different level of tack and flow properties. The two types of de-adhesion force curves of serum albumin from the hemodialysis membrane can be explained in terms of the difference in the physical process of de-adhesion and in a general perspective of self-cohesive force of the adhesives.
  • Hiroyuki Ushifusa, Kazuaki Inaba, Kosuke Takahashi, Kikuo Kishimoto
    JOURNAL OF SUPERCRITICAL FLUIDS 94 174 - 181 2014年10月 [査読有り][通常論文]
     
    We have developed a new apparatus to dynamically generate supercritical CO2 (scCO(2)) bubbles in water using a water hammer facility by efficiently concentrating water energy. We measured the internal and external pressures of a CO2 bubble covered with a rubber membrane using pressure transducers, and observed the bubble's oscillations by a high-speed video camera. We evaluated the maximum duration of the scCO(2) for conditions 60 mu s in experiments. We performed numerical simulations using the Rayleigh-Plesset equation by substituting the experimental external pressure profiles of the bubble and confirmed that numerical results agreed with the experimental internal pressure. Moreover, in the minimum external pressure condition where we experimentally achieved the condition of scCO(2) in the bubble for 16 mu s by water hammer, we obtained the maximum duration of scCO(2) conditions up to 55 mu s numerical simulations assuming isotropic compression. (C) 2014 Elsevier B.V. All rights reserved.
  • Budiman Bentang Arief, Takahashi Kosuke, Inaba Kazuaki, Kishimoto Kikuo
    Journal of Composite Materials 0021998314521061  SAGE Publications 2014年 [査読有り][通常論文]
  • 高橋航圭, 新井大輔, 因幡和晃
    ターボ機械 42 12 767  日本工業出版 2014年 [査読有り][通常論文]
  • Takahashi Kosuke, Shimizu Masashi, Inaba Kazuaki, Kishimoto Kikuo, Inao Yoichi, Sugizaki Toshio
    International Journal of Adhesion and Adhesives 45 90  Elsevier 2013年 [査読有り][通常論文]
  • Takahashi Kosuke, Sugita Seiji, Oshima Shuzo, Inaba Kazuaki, Kishimoto Kikuo
    Applied Physics Letters 103 4 043113  AIP Publishing 2013年 [査読有り][通常論文]
  • Kosuke Takahashi, H. Thomas Hahn
    STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL 11 3 367 - 377 2012年05月 [査読有り][通常論文]
     
    This article considers the practical use of electrical resistance change method (ERCM) for damage detection in graphite/polymer composites. ERCM utilizes the high electrical conductivity of graphite fibers in the composites and can detect damage by change in electrical resistance. Since the effectiveness of ERCM has been shown extensively in the literature, it is now necessary to consider how to apply ERCM into existing structures. For practical use of ERCM, a new concept of an addressable conducting network (ACN) has been proposed, which consists of two sets of conducting lines normal to each other. One set of lines resides on the top surface of the laminate and the other resides on the bottom surface. Damage can be detected by monitoring resistance change between two lines across the laminate thickness. In this article, composite panels with several sets of conducting lines are locally loaded by a static indentation test and examined to monitor the distribution of electrical resistance changes. Monitoring the changes in resistance successfully indicated the damage occurrence, but it is sometimes difficult to pinpoint the damage location due to the resistance changes caused by compressive deformation. To improve the sensitivity of ACN to damage, the relationship between damage location and electrical conductivity was investigated using a design of experiments. The changes in resistance with various damage locations and electrical conductivities were acquired from finite element analysis, and the results suggested several ways to optimize damage detection. Depending on the damage tolerance of target structure, spacing of conducting lines and the electrical conductivities can be preferably selected toward practical application of ACN.
  • Kosuke Takahashi, H. Thomas Hahn
    COMPOSITES PART B-ENGINEERING 43 3 833 - 840 2012年04月 [査読有り][通常論文]
     
    This paper aims to develop an autonomic thermal management system of graphite fiber/polymer composite structures using their electrical property. A number of copper tapes are integrated on top and bottom surfaces of a composite plate, and through the thickness resistances between these tapes are measured on a hotplate for temperature monitoring. The resistance at warmer area successfully reflected the temperature distribution taken by an IR imaging camera. The same copper tapes are subsequently used for generating resistive heat by supplying a large amount of current. The effective heat generation is investigated by a finite element analysis, showing that the temperature of a laminate can be controlled by adjusting the conductivity in the fiber and thickness directions. (C) 2012 Elsevier Ltd. All rights reserved.
  • Takahashi Kosuke, Hahn H Thomas
    Journal of Composite Materials 0021998311416683  Sage Publications 2011年 [査読有り][通常論文]
  • Jong Se Park, Thomas Darlington, Anthony F. Starr, Kosuke Takahashi, Joseph Riendeau, H. Thomas Hahn
    COMPOSITES SCIENCE AND TECHNOLOGY 70 15 2154 - 2159 2010年12月 [査読有り][通常論文]
     
    Self-healing composites using a thermally mendable polymer bis-maleimide tetrafuran (2MEP4F) based on Diels-Alder reaction and electrical resistive heating were fabricated using a vacuum assisted injection molding method Delaminations were induced using short span three point bending on composite coupons The induced damage and permanent deformation of the composite coupons were observed using X ray micro-tomography The same procedure was repeated to confirm multiple healings after electrical resistive heating and healing efficiency of the samples was determined The permanent deformations and induced delaminations were repaired after the heating process which is due to both healing and shape memory effects The multiple healing ability and shape memory effect of the fabricated composite combined with electrical resistive heating realizes a noble self-healing composite (C) 2010 Elsevier Ltd All rights reserved
  • Kosuke Takahashi, Jong Se Park, H. Thomas Hahn
    SMART MATERIALS & STRUCTURES 19 10 105023  2010年10月 [査読有り][通常論文]
     
    The electrical resistance change method (ERCM) has long been an area of interest as an in-service health monitoring system. To apply the ERCM to existing structures, a new concept, the addressable conducting network (ACN), is proposed for autonomic structural health management of graphite/polymer composites. The ACN consists of two sets of conducting lines normal to each other, where one set resides on the top surface of the laminate and the other on the bottom surface. Damage can be detected by monitoring the resistance change 'through the laminate thickness' between two lines. By using a thermally mendable polymer as the matrix, the same conducting lines can be used to supply the electric current needed for resistive heating, thereby allowing the detected damage to be healed. As shown experimentally, the electrical resistance change method using an ACN distinguishes between laminates made of properly and improperly cured prepreg as well as revealing damage generated during three-point bending tests. Finite element analysis was performed to examine the feasibility of the ACN and indicated that the damage can be easily located from the spatial distribution of resistance changes and that the damaged area can be locally heated by supplying a large amount of current to selected conducting lines.
  • Takahashi Kosuke, Todoroki Akira, Matsuzaki Ryosuke
    Transactions of the Japan Society of Mechanical Engineers Series A 74 748 1573  2010年 [査読有り][通常論文]
  • Takahashi Kosuke, Todoroki Akira, Matsuzaki Ryosuke
    Journal of Environment and Engineering 5 1 15  2010年 [査読有り][通常論文]
  • 鈴木良郎, 轟章, 高橋航圭, 水谷義弘, 松崎亮介
    日本機械学會論文集. A 編 76 767 961  一般社団法人日本機械学会 2010年 [査読有り][通常論文]
  • Jong Se Park, Kosuke Takahashi, Zhanhu Guo, Ying Wang, Ed Bolanos, Christine Hamann-Schaffner, Erin Murphy, Fred Wudl, H. Thomas Hahn
    JOURNAL OF COMPOSITE MATERIALS 42 26 2869 - 2881 2008年12月 [査読有り][通常論文]
     
    Mendomers are a group of polymers that are mendable upon heating. Specifically, cracks in these polymers have been shown to heal themselves when heated close to the glass transition temperature. The main mechanism behind the healing is the thermally reversible Diels-Alder reaction, where a dicyclopentadiene unit in the polymer backbone breaks apart into two cyclopentadiene terminal groups, which then reunite upon heating. The present study investigates the feasibility of using a mendomer as a matrix for re-mending composites reinforced with graphite fibers. The graphite fibers are used as electrical conductors to provide the necessary heat to the polymer. Specimens were prepared by spreading a monomer, called mendomer, powder on a graphite/epoxy laminate substrate and curing in a vacuum oven. Microcracks were introduced by bending the substrate coupon, and the latter was heated by applying electric currents. The healing behavior was confirmed by disappearance of microcracks that were observed with an optical microscope and a scanning electron microscope (SEM).
  • Ryosuke Matsuzaki, Akira Todoroki, Kosuke Takahashi
    SMART MATERIALS & STRUCTURES 17 5 055001  2008年10月 [査読有り][通常論文]
     
    Wireless monitoring of the health of CFRP structures reduces the cost and time of inspections and can be usefully applied for continuous monitoring. In a previous study, we presented a wireless sensor for detection of internal delamination in a CFRP laminate. The method utilizes a simple electrical resistance change in CFRP and so monitors delamination at only one location. For monitoring of large-scale structures, however, many sensors have to be distributed to cover the structure. A major problem for using many sensors is time synchronization among sensors. To overcome the problem and enable strain/damage to be monitored at multiple locations with time synchronization, we develop a simple wireless strain/damage sensor that consists of a bridge circuit, voltage-controlled oscillator and amplifiers. Since the sensor does not need A/D conversion procedures or memory storing, there is no time delay. Each sensor has an original basic frequency that changes in accordance with the electrical resistance. The frequencies from the multiple sensors are transmitted to a receiver. Using a short-time maximum entropy method, the received waves are converted to multiple electrical resistance data. The proposed method is applied to CFRP laminates and oscillating frequencies are measured in real time. The results show that the system successfully measures applied strain and detects fiber breakage at multiple locations in CFRP laminates with time synchronization.
  • 高橋航圭, 轟章, 松崎亮介
    日本機械学会論文集 A 編 74 748 1573  The Japan Society of Mechanical Engineers 2008年 [査読有り][通常論文]
  • 高橋航圭, 轟章, 松崎亮介
    日本機械学会論文集 A 編 74 748 1565  The Japan Society of Mechanical Engineers 2008年 [査読有り][通常論文]
  • Takahashi Kosuke, Todoroki Akira, Shimamura Yoshinobu, Iwasaki Atsushi
    353 2337  2007年 [査読有り][通常論文]

その他活動・業績

受賞

  • 2019年05月 日本接着学会 進歩賞
     キャビティ膨張とフィブリル伸張に基づくはく離強度の粘着剤・基材厚さ依存性に関する考察 
    受賞者: 高橋 航圭
  • 2017年04月 日本機械学会 日本機械学会奨励賞(研究)
     微細構造体の表面エネルギーに起因する吸着力・接着力の評価に関する研究 
    受賞者: 高橋 航圭
  • 2015年11月 日本機械学会材料力学部門 M&M若手シンポジウム2015 優秀講演表彰
     毛細管現象の吸着力による平板の変形過程 
    受賞者: 高橋 航圭
  • 2014年03月 日本機械学会材料力学部門 M&M 2013材料力学カンファレンス 優秀講演表彰
     濡れによる液架橋形成が及ぼす平板の変形評価 
    受賞者: 高橋 航圭

共同研究・競争的資金等の研究課題

  • 動的荷重下における繊維強化複合材料の繊維/樹脂界面特性評価に関する研究
    みずほ学術振興財団:第56回工学研究助成
    研究期間 : 2013年04月 -2015年03月 
    代表者 : 高橋 航圭
  • 損傷検知・修復機能を有する複合材料構造物の開発
    日本学術振興会:二国間交流事業(韓国との共同研究)
    研究期間 : 2012年07月 -2014年06月 
    代表者 : 高橋 航圭
  • 液体のぬれが及ぼす構造体変形現象のマクロスケール観察による定式化と無次元数を用いたマイクロ・ナノデバイスへの適用性に関する研究
    公益財団法人マツダ財団:第29回(2013年度)マツダ研究助成
    研究期間 : 2013年04月 -2014年03月 
    代表者 : 高橋 航圭

教育活動情報

主要な担当授業

  • 機械宇宙工学特別講義
    開講年度 : 2018年
    課程区分 : 修士課程
    開講学部 : 工学院
  • Computational Solid Mechanics(計算固体力学E)
    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 : 計算力学、連続体力学、分子動力学、マルチスケール解析
  • Strength and Fracture of Materials(材料強度学E)
    開講年度 : 2018年
    課程区分 : 修士課程
    開講学部 : 工学院
  • 計算固体力学特論
    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 : 計算力学、連続体力学、分子動力学、マルチスケール解析
  • Computational Solid Mechanics(計算固体力学E)
    開講年度 : 2018年
    課程区分 : 博士後期課程
    開講学部 : 工学院
    キーワード : 計算力学、連続体力学、分子動力学、マルチスケール解析
  • Strength and Fracture of Materials(材料強度学E)
    開講年度 : 2018年
    課程区分 : 博士後期課程
    開講学部 : 工学院
  • 計算固体力学特論
    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 : 計算力学、連続体力学、分子動力学、マルチスケール解析
  • 機械工学概論
    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 : 機械工学,材料,工業力学,熱,流体,エネルギー
  • 国際交流Ⅱ
    開講年度 : 2018年
    課程区分 : 学士課程
    開講学部 : 国際本部
  • 材料強度学
    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 : 材料強度、延性破壊、脆性破壊、弾性破損、疲労破壊
  • 材料力学Ⅰ
    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 : 応力とひずみ、引張と圧縮、せん断、ねじり、はりの曲げ

大学運営

委員歴

  • 2019年04月 - 2020年03月   日本複合材料学会   代議員
  • 2019年04月 - 2020年03月   日本機械学会 材料力学部門   広報委員会委員長
  • 2019年04月 - 2020年03月   日本複合材料学会 東北・北海道支部   支部商議委員
  • 2019年04月 - 2020年03月   日本材料学会   破壊力学部門 幹事
  • 2018年04月 - 2020年03月   日本機械学会   RC278分科会 委員
  • 2018年04月 - 2020年03月   日本機械学会材料力学部門   シンポジウム実行委員会(M&M 若手シンポジウム 2019)委員
  • 2017年05月 - 2019年03月   日本溶接協会   FQA3小委員会 中立委員
  • 2016年04月 - 2019年03月   日本機械学会 機械材料・材料加工部門   運営委員会委員
  • 2017年04月 - 2018年03月   日本機械学会材料力学部門   M&M2017材料力学カンファレンス実行委員会 委員
  • 2017年04月 - 2018年03月   日本複合材料学会   代議員
  • 2016年04月 - 2018年03月   日本機械学会   RC271分科会 委員
  • 2016年04月 - 2017年03月   日本機械学会材料力学部門   シンポジウム実行委員会(2016 M&M International Symposium for Young Researchers)委員


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