Search Results 1-20 of 322

  • Effect of Heating Order on Interference between Deformations by Curved Line Heating in Laser Forming  [in Japanese]

    Akiyama Tetsuya , Kitamura Takanori , Izutsu Ryosuke , Maeda Yuta

    … heating order on angular distortion in laser forming under different two conditions, straight heating lines and curved heating lines.</p><p>Annealed austenitic stainless steel sheet material with 0.75 mm thick was used as the test material for the laser forming with 1500 W YAG laser before deformation measurement by using a non-contact three-dimensional coordinate measuring device.</p><p>From the relationship between the heating order and the angular distortions of the …

    Journal of the Japan Institute of Metals and Materials 85(4), 138-146, 2021

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  • Methods of graphic representation for joint sinus cone based on map projection system: appropriateness of Lambert azimuthal equal-area projection for shoulder joint sinus  [in Japanese]

    YOSHIDA Naoki , SHIROGANE Satoshi , NISHISHITA Satoru , MATSUMOTO Kenji

    <p> 多軸関節の可動域の表現方法として、joint sinus cone(または単にsinus)と呼ばれる方法がある。これは関節を構成する体節の長軸の運動範囲であり、この範囲は球面上の領域に対応する。sinusを平面の図として表現する場合には、大きさ・位置・形状などの特性に歪みが生じるという問題がある。本研究では、この問題を地図投影法の概念を用いて整理し、sinusを平面で表示する方 …

    Rehabilitation Engineering 36(1), 49-56, 2021

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  • Effects of additional weld and grinding on fatigue life extension of non-load-carrying cruciform joints

    TSUTSUMI Seiichiro , TAKATA Koyo , FINCATO Riccardo

    … However, additional weld and grinding treatments introduce geometrical and material changes such as the modification of the bead shape, angular distortions and welding residual stresses. …

    QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY 38(2), 172s-176s, 2020

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  • Orbital Angular Momentum Crossover in 1-D High Spin Cobalt(II) Complex

    Zenno Hikaru , Akiyoshi Ryohei , Nakamura Masaaki , Morgan Grace G. , Hayami Shinya

    … shows a magnetic anomaly caused by a structural change that reduces the distortion and alters the orbital angular momentum crossover to magnetic susceptibility. …

    Chemistry Letters 49(9), 1099-1102, 2020

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  • EFFECT OF LOCAL MATERIALS AND GEOMETRIES OF WELD JOINT ROOT ON FATIGUE CRACK INITIATION AND PROPAGATION LIFE  [in Japanese]

    TSUTSUMI Seiichiro , SHIBATA Homare , FINCATO Riccardo

    <p>社会基盤構造物において疲労が大きな問題となっており,破損事例も多く報告されている.中でも溶接継手ルート部から発生するき裂は,溶接ビード表面からの目視による発見が困難なこともあり,疲労性能支配因子の明確化と精度の高い評価手法が重要となる.本研究では,溶接継手ルート部を起点とする疲労損傷に影響を与える諸因子について数値解析的な検討を行った.具体的には,非線形 FEM 解析および線形破 …

    Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM)) 75(2), I_467-I_476, 2019

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  • Parametric formulae for elastic stress concentration factor of butt-welded joints with angular distortion

    Yuxiao Luo , Tsutsumi Seiichiro

    … Based on a large set of 2D finite element analyses, the parametric formulae for SCF and clamping stress at the weld toe of butt-welded joints with angular distortion were proposed. …

    Preprints of the National Meeting of JWS 2019f(0), 374-375, 2019

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  • 3D point-cloud mapping using laser scanner mounted on two-wheeled vehicle based on NDT scan matching  [in Japanese]

    TOKORODANI Kohei , HASHIMOTO Masafumi , AIHARA Yusuke , TAKAHASHI Kazuhiko

    … The vehicle's pose is updated in a period shorter than the laser-scan period using its attitude and angular velocity measured by an inertial measurement unit (IMU). … The pose estimation is based on extended Kalman filter under the assumption that the vehicle moves at nearly constant translational and angular velocities. … The estimated poses of the vehicle are applied to distortion correction of laser-scan data, and a point-cloud map is generated based on the corrected laser-scan data. …

    Transactions of the JSME (in Japanese) 85(878), 19-00055-19-00055, 2019

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  • Experimental and Numerical Study of Welding Deformation in Truss Structure of Steel Angles  [in Japanese]

    TADANO Satoshi , MIZUUCHI Rieko , SUGIURA Kouji , NAKATANI Yujiro

    … As a result, we revealed that the main beams of the welded truss structure were arched against the direction of angular distortion observed in the welded joint model. …

    QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY 37(1), 52-58, 2019

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  • Ripple formation on Si surfaces during plasma etching in Cl2

    Nakazaki Nobuya , Matsumoto Haruka , Sonobe Soma , Hatsuse Takumi , Tsuda Hirotaka , Takao Yoshinori , Eriguchi Koji , Ono Kouichi

    … The distortion of potential distributions and the consequent deflection of ion trajectories above and in the trenches were then analyzed based on electrostatic particle-in-cell simulations of the plasma sheath, to evaluate the angular distributions of ion fluxes incident on substrates pasted on sidewalls and/or at the bottom of the trenches. …

    AIP Advances 8(5), 055027-1-055027-12, 2018-05

    IR 

  • Ripple formation on Si surfaces during plasma etching in Cl2

    Nakazaki Nobuya , Matsumoto Haruka , Sonobe Soma , Hatsuse Takumi , Tsuda Hirotaka , Takao Yoshinori , Eriguchi Koji , Ono Kouichi

    … The distortion of potential distributions and the consequent deflection of ion trajectories above and in the trenches were then analyzed based on electrostatic particle-in-cell simulations of the plasma sheath, to evaluate the angular distributions of ion fluxes incident on substrates pasted on sidewalls and/or at the bottom of the trenches. …

    AIP Advances 8(5), 2018-05

    IR 

  • Point-Cloud Map Generation using Laser Scanner Mounted on Two-wheeled Vehicle based on NDT Scan Matching  [in Japanese]

    TOKORODANI Kohei , HASHIMOTO Masafumi , TAKAHASHI Kazuhiko

    … The vehicle’s pose is updated in a period shorter than the laserscan period using its attitude and angular velocity measured by an inertia measurement unit (IMU). … The pose estimation is based on Kalman filter under the assumption that the vehicle moves at nearly constant translational and angular velocities. … The estimated poses of the vehicle are applied to distortion correction of laser-scan data, and a point-cloud map is generated based on the corrected laser-scan data. …

    The Proceedings of the Transportation and Logistics Conference 2018.27(0), 2506, 2018

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  • Switching of the deformation patterns of a periodic structural system and its loading rate dependence  [in Japanese]

    TANAKA Hiro , YAMANOKUCHI Gakuto , HAMADA Kazutoshi , SHIBUTANI Yoji

    … To resolve the deformation transition mechanism, we modeled a specific bar-and-joint framework with two angular variables specifying the rotation and distortion of the linked square components, and we showed that the switching behavior can be represented by a hyperbolic type of equilibrium paths of the system. …

    The Proceedings of the Materials and Mechanics Conference 2018(0), OS1036, 2018

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  • Effect of Welding Process Conditions on Angular Distortion Induced by Bead-on-plate Welding

    Mochizuki Masahito , Okano Shigetaka

    … <p>In this study, the effect of welding process and heat input conditions on the angular distortion induced by bead-on-plate welding was investigated through a numerical approach. … Numerical models of gas metal arc welding (GMAW) and gas tungsten arc welding (GTAW), which were developed in a previous study, were utilized for accurate distortion analyses. …

    ISIJ International 58(1), 153-158, 2018

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  • Distortion reduction of parts made by wire and arc additive manufacturing technique using low transformation temperature welding materials  [in Japanese]

    KITANO Houichi , NAKAMURA Terumi

    … Current work deals with investigation of the effect of the use of low transformation temperature welding wire (LTT welding wire) on distortion reduction of parts made by wire and arc additive manufacturing technique (WAAM). … Distortion of base plates of test pieces were evaluated by 3D non-contact coordinate measurement system. …

    QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY 36(1), 31-38, 2018

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  • Influence of Initial Shape on Deformation by Multiple Heating in Laser Forming  [in Japanese]

    TASHIRO Kota , Ishitobi Shuji , Kodama Ryo , Akiyama Tetuya , Kitamura Takanori

    金属板の曲面成形にレーザフォーミングを用いることで自動化が可能となり,加工におけるコスト削減が期待できる.実用化のためには高い精度が必要となるが,初期形状の違いによって変形に及ぼす拘束や断面係数等の条件が異なるため,これらの影響を検討する必要がある.そこで本研究では様々な初期形状を有する材料にレーザフォーミングを行い,初期形状が変形に与える影響の解明を行った.

    Preprints of the National Meeting of JWS 2017f(0), 92-93, 2017

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  • Engineering Model of Metal Active Gas Welding Process for Efficient Distortion Analysis

    Okano Shigetaka , Mochizuki Masahito

    … <p>This study presents a computational framework for an efficient distortion analysis based on coupled process-mechanics modeling of metal active gas (MAG) welding. … The bead surface and temperature profiles obtained were used for a large deformation thermal elastic–plastic analysis of weld angular distortion. …

    ISIJ International 57(3), 511-516, 2017

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  • Effect of Backside Heating on Angular Distortion of Fillet Weld(2nd Report)  [in Japanese]

    小谷 祐樹 , 津山 忠久

    川田技報 Kawada technical report 35, 6p, 2016-01

  • A quartz vibrating gyroscope interface circuit driven by sine-wave based on nonlinear multiplier

    Fu Qiang , Yin Liang , Di Xinpeng , Chen Weiping , Liu Xiaowei

    … The interface circuit is fabricated in a 0.5 µm CMOS process and the test results show that the start time of drive signal is less than 2 ms. The drive signal frequency stability can reach to 0.084% (1-sigma) and the harmonic distortion is about 1.056%. … Meanwhile, the short stability (1-sigma) is 2.1°/hr, the angular random walk (ARW) and bias drift are 0.01388°/√hr and 0.16°/hr respectively.</p> …

    IEICE Electronics Express 13(19), 20160565-20160565, 2016

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  • Numerical simulation of weld distortion by considering convective heat transport phenomena in weld pool  [in Japanese]

    TSUJI Hitoshi , OKANO Shigetaka , MOCHIZUKI Masahito

    本研究では,溶融池内対流熱輸送現象を考慮した数値シミュレーションを構築し,溶接変形の高精度予測に向けて検討を行った.溶込み形状の変化によって角変形量に明確な差が生じ,溶接シミュレーションの高精度化に向けて溶融池内対流熱輸送現象を考慮することが有用であることを示した.

    Preprints of the National Meeting of JWS 2016s(0), 212-213, 2016

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  • Assembling a database of inherent strain for simplified distortion analysis in multi-layer and multi-pass welding of heavy section plate (Development of accuracy management system for high quality construction in welded structures on the basis of advanced theory of inherent strain)  [in Japanese]

    OKANO Shigetaka , TADANO Satoshi , NAKATANI Yujiro , MOCHIZUKI Masahito

    … In this paper, a database of the identically-distributed inherent strain within mechanical melting zone is developed and then applied for simplified distortion analysis in multi-layer and multi-pass welding of heavy section plate. … First, numerical and experimental investigations of weld angular distortion were performed for multi-layer and multi-pass welding of heavy section plate to verify the simplified weld distortion analysis based on the theory of inherent strain. …

    Transactions of the JSME (in Japanese) 82(837), 16-00005-16-00005, 2016

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