Search Results 1-20 of 171

  • A STRESS CALCULATION METHOD FOR CONSTITUTIVE MODEL BASED ON RETURN MAPPING ALGORITHM EMBEDDING NEURAL NETWORK  [in Japanese]

    TERANISHI Masaki

    … Constitutive models with high reproducibility against the hardening behaviors have been required to obtain the high-precision result of the finite element elasto-plastic analysis. … Some effective constitutive models have been proposed, however they had high calculation cost because they employed many plastic internal variables and assumptions. …

    Journal of Structural and Construction Engineering (Transactions of AIJ) (778), 1565-1573, 2020-12

    J-STAGE  AIJ 

  • Numerical Simulation on Effect of Microstructure on Hydrogen-induced Cracking Behavior in Duplex Stainless Steel Weld Metal

    Ogita Gen , Matsumoto Koki , Mochizuki Masahito , Mikami Yoshiki , Ito Kazuhiro

    … A microstructure-based finite element simulation was performed to clarify the concentration distribution at the microstructural scale. … A finite element model based on the cross-section of the microstructure was designed to calculate the stress and hydrogen concentration distribution. …

    ISIJ International, 2020

    J-STAGE 

  • The relationship between hydrogen concentration behavior and local triaxial stress  [in Japanese]

    OHMI Toshihito , NAKAHARA Rikuya , YOKOBORI Toshimitsu

    … In these numerical analyses, hydrogen is diffused with the hydrogen concentration gradient and the hydrostatic stress gradient. … And hydrostatic stress gets the locale maximum value at elastic-plastic boundary, so elasto-plastic finite element analysis is needed. …

    The Proceedings of Mechanical Engineering Congress, Japan 2019(0), S03128, 2019

    J-STAGE 

  • Numerical Simulation of Cut Surface Shape and Residual Stress Distribution in Shearing Process

    Fukumura Masaru , Zaizen Yoshiaki , Omura Takeshi , Senda Kunihiro , Oda Yoshihiko

    … <p>Many analyses relating to shearing of sheet products have already been reported, and an increasing number of elasto-plastic analyses evaluating the residual stress inside sheets have also appeared in recent years. … However, because only a few papers have presented measured residual stress distributions, very few in-depth comparisons between calculated stress levels and experimental results are available. …

    MATERIALS TRANSACTIONS 60(9), 1996-2002, 2019

    J-STAGE 

  • Effect by a Plain Washer on Reduction of Bolt Axial Tension in Bolted Joints in the case of Creep Deformation of Clamped Parts  [in Japanese]

    MASUDA Hirotaka , OMIYA Yuya , MOROZUMI Yukio , FUJII Masahiro , GENBA Nobuyoshi

    … Contact surface deformation by creep is considered to be related to contact surface stress distribution and stress inside the bolted joint. … It was found that when the contact surface stress is large at the outer diameter side of the contact surface, the stress near the bolt hole inside the bolted joint decreases and the creep strain decreases. …

    The Proceedings of the Materials and Mechanics Conference 2018(0), GS0602, 2018

    J-STAGE 

  • Numerical Simulation of Cut Surface Shape and Residual Stress Distribution in Shearing Process  [in Japanese]

    FUKUMURA Masaru , ZAIZEN Yoshiaki , OMURA Takeshi , SENDA Kunihiro , ODA Yoshihiko

    Elasto-plastic analyses to evaluate residual stress inside the sheet have also been increasing. … However, only a few papers have shown measured residual stress distributions, so very few in-depth comparisons between calculated stress levels and experimental results are available. …

    Journal of the Japan Society for Technology of Plasticity 59(688), 65-70, 2018

    J-STAGE 

  • AN EXPERIMENTAL STUDY ON CABLE FOR STRUCTURE ABOUT THE STRESS-STRAIN RELATION  [in Japanese]

    NAKAJIMA Hajime , YAMAZAKI Yumiko , ZHANG Yanjiao , KASAHARA Takashi , ISHINABE Yuichiro

    … In past research, elasto-plastic behavior of structure with cables under earthquake load and the snow load was reported. … Although specific stress-strain relationship of cables was assumed in such research, reliable data is currently available in limited diameter and wire constitution. … In addition, the elongation distribution in the tensile test along overall length has not been reported. …

    AIJ Journal of Technology and Design 24(56), 105-110, 2018

    J-STAGE 

  • Development of a Method for Fatigue Life Evaluation Using Strain Gradient Parameters  [in Japanese]

    KAWASHITA Michihiro , SHIMODAIRA Takayuki , AOYAMA Hiroshi

    … In particular, the toes of welding and the tops of non-welded portion become causes of fractures because these are stress concentration points. … Thus, a method is required for evaluating fatigue life by analyzing these stress concentration points in a lump. …

    Journal of the Society of Materials Science, Japan 67(2), 269-275, 2018

    J-STAGE 

  • EFFECT OF INITIAL IMPERFECTION ON ELASTO-PLASTIC BEHAVIOR OF SQUARE STEEL TUBULAR COLUMNS UNDER COMPRESSIVE AXIAL FORCE WITH MONOTONIC ANTISYMMETRIC BENDING MOMENT  [in Japanese]

    SATO Atsushi , MITSUI Kazuya , AOYAMA Masahiro , INDEN Kenta

    …  It is well know that initial imperfections (e.g. bow-shaped imperfection of member, bow-shaped imperfection of plate and residual stress) have an influence on the performance of the columns. … As mentioned before, the columns of steel structures are subjected to axial load and bending moment, and the moment diagram is antisymmetric bending moment distribution or bending moment distribution close to antisymmetric. …

    Journal of Structural and Construction Engineering (Transactions of AIJ) (741), 1787-1797, 2017-11

    J-STAGE  AIJ 

  • Analytical verification of residual stress distribution in steel plate after hammer peening  [in Japanese]

    Matsumoto Risa , Ishikawa Toshiyuki , Tsutsumi Seiichiro , Kawano Hirotaka , Yamada Kentaro

    … Hammer peening is one of techniques for improving fatigue strength by introducing compressive residual stress at weld toe. … Hammer peening by using ICR (impact crack closure retrofit) treatment device, where flat area in front of weld toe is intentionally peened, is also able to introduce compressive residual stress at weld toe as well as near the peened area. …

    Kozo Kogaku Ronbunshu. A (Journal of Structural Engineering. A) 62A(0), 685-692, 2016

    J-STAGE 

  • EFFECT OF LATERAL-ROTATIONAL RESTRAINT OF CONTINUOUS BRACES ON LATERAL BUCKLING STRENGTH FOR H-SHAPED BEAMS WITH FLEXURAL MOMENT GRADIENT  [in Japanese]

    KIMURA Yoshihiro , YOSHINO Yuki

    … If the stress of the flange with continuous braces becomes a tensile, the rotational rigidities of the lateral braces must be increased to obtain sufficient amount of the lateral buckling strength of the beams.<br> Our previous research (Kimura, Yoshino and Ogawa 2012) clarified the relation between the lateral buckling strength of H-shaped beams and the demands of the lateral and rotational rigidities for continuous braces when a beam is subjected to uniform moment distribution. …

    Journal of Structural and Construction Engineering (Transactions of AIJ) 81(726), 1309-1319, 2016

    J-STAGE 

  • Elasto-plastic Analysis of Bellows Considering Thickness Distribution  [in Japanese]

    久末 悠真 , 藤木 裕行 , 臺丸谷 政志

    … 60% of bellows failure is caused by fatigue and low cycle fatigue failure occurs on bellows because the bellows are used in plastic region. … This study intends to elucidate the mechanical properties of the bellows with elasto-plastic analysis. … Analysis models considering thickness distribution are constructed in order to elucidate the influence of the thickness distribution. …

    年次大会 = Mechanical Engineering Congress, Japan (2015), 2015-09-13

    IR 

  • Accurate Magnetic Field Analysis for Estimating Motor Characteristics Considering Deteriorated Magnetic Properties in Magnetic Core Due to Stamping  [in Japanese]

    Yamaguchi Shinichi , Daikoku Akihiro , Tani Yoshihiro , Tanaka Toshinori , Fujino Chiyo

    … In this paper, we propose an accurate finite-element analysis for estimating motor characteristics that focuses on elasto-plastic deformation in the magnetic core. … Based on the results, the method that considers the maximum principal stress is suitable rather than the method that considers the von Mises stress. …

    IEEJ Transactions on Industry Applications 135(11), 1107-1115, 2015

    J-STAGE 

  • MEASUREMENT METHOD FOR WELDING RESIDUAL STRESS IN STEEL I-SHAPED GIRDER WITH THICK FLANGE AND ITS INFLUENCE ON LOAD-CARRYING CAPACITY FOR BENDING

    MIYASHITA Takeshi , INABA Naofumi , HIRAYAMA Shigeyuki , LIU Cuiping , NAGAI Masatsugu

    … It is feared that residual stress in the thick plate affects the girder's load-carrying capacity, yet residual stress measurement data are insufficient. … the residual stress distribution is also measured in the flange plate width and thickness direction using a mechanical cutting method. … It is found that the slope of stress distribution in the plate thickness direction increases as the thickness of the plate increases. …

    Journal of JSCE 3(1), 191-208, 2015

    J-STAGE 

  • G0300503 Elasto-plastic Analysis of Bellows Considering Thickness Distribution  [in Japanese]

    HISASUE Yuma , FUJIKI Hiroyuki , DAIMARUYA Masashi

    … 60% of bellows failure is caused by fatigue and low cycle fatigue failure occurs on bellows because the bellows are used in plastic region. … This study intends to elucidate the mechanical properties of the bellows with elasto-plastic analysis. … Analysis models considering thickness distribution are constructed in order to elucidate the influence of the thickness distribution. …

    The Proceedings of Mechanical Engineering Congress, Japan 2015(0), _G0300503--_G0300503-, 2015

    J-STAGE 

  • Adhesion Phenomena of Small Particles and Fine Wires

    Takahashi Yasuo

    … Elastic and elasto-plastic adhesion behavior of nano- and micro-particles and wires are discussed. … The equations which give a stress distribution on the bonded area are introduced. … This is due to the stress induced diffusion along the bonded interface which reduces the residual stress which occurs on the bonded interface. …

    Transactions of JWRI 43(2), 11-20, 2014-12

    IR 

  • Study on adhesive strength criteria under combined stresses and its adhesive thickness dependency  [in Japanese]

    KANEKO Kenji

    … Apparent critical fracture loci are obtained in the stress plane composed by the average tensile stress σ and the maximum shear stress τ<sub>max</sub> … Effects of adhesive thickness on the critical stress is larger in σ directions than in τ<sub>max</sub> …

    Transactions of the JSME (in Japanese) 80(816), SMM0218-SMM0218, 2014

    J-STAGE 

  • 114 Evaluation of Mechanical Property for Stainless Flexible Tube  [in Japanese]

    IKEDA Kouki , FUJIKI Hiroyuki

    The Proceedings of Conference of Hokkaido Branch 2014.53(0), 7-8, 2014

    J-STAGE 

  • A multiscale approach for the deformation mechanism in pearlite microstructure: Numerical evaluation of elasto-plastic deformation in fine lamellar structures

    Ohashi Tetsuya , Roslan Lidyana , Takahashi Kohsuke , Shimokawa Tomotsugu , Tanaka Masaki , Higashida Kenji

    Elasto-plastic deformations in the microstructures of pearlite are studied by finite-element analyses. … When higher values of yield stress and strain hardening are used for ferrite phase, cementite deforms well beyond the elastic range and the distribution of plastic strain is not concentrated. …

    Materials Science and Engineering A (588), 214-220, 2013-10

    IR 

  • FEM Stress Analysis and the Sealing Performance Prediction of Pipe Flange Connections under External Bending Moments and Internal Pressure

    TAKAGI Yoshio , TORII Hiroyasu , OMIYA Yuya , KOBAYASH Takashi , SAWA Toshiyuki

    … The contact gasket stress distribution and the hub stress of pipe flange connection under external bending moment and internal pressure are analyzed using three dimensional elasto-plastic FEM. … The effect of external bending moment on the sealing performance is evaluated and the amount of the leakage is predicted using the contact gasket stress distribution. …

    Journal of Solid Mechanics and Materials Engineering 7(4), 486-495, 2013

    J-STAGE 

Page Top