Search Results 1-20 of 46

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  • A Preliminary Study on 3D Printing of Variable-Stiffness Fiber Reinforced Thermoplastic Composites with Spline Curved Orientation and Volume Fraction of Fibers as Design Variables  [in Japanese]

    SUZUKI Kohji , WANG Zun , HONDA Shinya

    … <p>Carbon fiber reinforced plastic's performance is clearly different depending on the orientation type of the reinforcing fiber. … Composite materials oriented from conventional straight lines are now widely used, but they are not optimal in situations where fiber damage or stress concentration occurs due to drilling. …

    The Proceedings of the Dynamics & Design Conference 2020(0), 110, 2020

    J-STAGE 

  • Modeling and Design Proposal for Variable-Stiffness Fiber Reinforced Composites with Spline Curved Orientation and Volume Fraction of Fibers as Design Variables  [in Japanese]

    WANG Zun , SUZUKI Kohji , MORITA Chihiro

    … <p>Carbon fiber reinforced plastic's performance is clearly different depending on the orientation type of the reinforcing fiber. … Composite materials oriented from conventional straight lines are now widely used, but they are not optimal in situations where fiber damage or stress concentration occurs due to drilling. …

    The Proceedings of Conference of Kanto Branch 2020(0), 17A01, 2020

    J-STAGE 

  • Progressive Damage Simulation for a 3D-printed Curvilinear Continuous Carbon Fiber Reinforced Thermoplastic Based on Continuum Damage Mechanics  [in Japanese]

    ICHIHARA Naruki , UEDA Masahito , URUSHIYAMA Yuta , TODOROKI Akira , MATSUZAKI Ryosuke , HIRANO Yoshiyasu

    … <p>Continuum damage mechanics (CDM)-based finite element analysis was performed to predict the mechanical behavior of a 3D-printed curvilinear continuous carbon fiber reinforced thermoplastic (c-CFRTP). … Then, an S-shaped curvilinear c-CFRTP was 3D-printed and tested under monotonic tensile loading conditions. …

    Journal of the Japan Society for Composite Materials 45(4), 155-163, 2019

    J-STAGE 

  • Improvement of buckling load for variable stiffness composite with reinforcing fibers placed in the principal stress direction  [in Japanese]

    YASUDA Masaki , HONDA Shinya , SASAKI Katsuhiko , TAKEDA Ryo

    … <p>Variable stiffness composites induced by curvilinear reinforcing fibers have become possible to be manufactured due to improving fiber orientation technology. … In this study, In general, the metaheuristics has been used to design curved fiber shapes. … However, it is extremely computationally expensive, and a simple method for designing curved fiber shapes by referring to the principal stress direction has also been proposed. …

    The Proceedings of the Materials and Mechanics Conference 2019(0), OS1906, 2019

    J-STAGE 

  • Sequential Approximate Optimization for Fibrous Composites by using RBF Network  [in Japanese]

    NAKAYA Shota , HONDA Shinya , SASAKI Katsuhiko , TAKEDA Ryo

    … <p>Carbon fiber reinforced plastics (CFRP) has strong anisotropy in addition to high specific strength and specific rigidity. … Also, in recent years, it has become possible to create CFRP structures with curvilinear reinforcing fibers, and the degree of freedom for optimum design is further increased. …

    The Proceedings of Mechanical Engineering Congress, Japan 2019(0), J04218P, 2019

    J-STAGE 

  • Plypass Optimization Design of Variable Stiffness CFRP laminates  [in Japanese]

    WANG Zun , SUZUKI Kohji

    … In this article, we will explain laying fiber curve, the preparation process of composite laminated plate method. … Using this method, in the laminated plate layer fiber after using the appropriate path, its internal stress and strain will also corresponding change, to make the composite board get better mechanical properties. …

    The Proceedings of the Dynamics & Design Conference 2019(0), 105, 2019

    J-STAGE 

  • Optimum design of reinforcement shapes around open-hole in laminate composite with Curvilinear fibers  [in Japanese]

    KIM Daekwi , HONDA Shinya , SASAKI Katsuhiko , TAKEDA Ryo

    … <p>This study aims to design optimum partial reinforcement with curvilinear fibers to maximize tensile strength of laminate composites with an open-hole. … In the numerical study, optimum shape of reinforcement fiber is determined by using Distributed Genetic Algorithm. … Obtained fiber shape reduce maximum principal strain by 36 % compared with without reinforcement. …

    The Proceedings of the Materials and Mechanics Conference 2018(0), OS0730, 2018

    J-STAGE 

  • 3D Printing of Variable-stiffness Composite Plate and Bolt Joint Tensile Test  [in Japanese]

    SUGIYAMA Kentaro , MATSUZAKI Ryosuke , MALAKHOV Andrei , POLILOV Alexander

    The Proceedings of the Materials and processing conference 2018.26(0), 121, 2018

    J-STAGE 

  • The effect of curvilinear carbon fiber arrangement on the mechanical properties of CFRP manufactured by electro-activated deposition molding  [in Japanese]

    KATAGIRI Kazuaki , KAWAKITA Sonomi , KIMURA Takahiro , TAKEMURA Mamoru , YOSHIOKA Yayoi , SASAKI Katsuhiko , HONDA Shinya , MINAMI Sayaka , KIM Daiki , YAMAGUCHI Shimpei , EHIRO Takuya , SONOMURA Hirosuke , OZAKI Tomoatsu

    … In this method, the carbon fiber fabric with curvilinear carbon fiber arrangement could be easily manufactured. … The arbitrary arrangement of carbon fiber fabric can be woven by using embroidery machine, and was immersed in an electrodeposition solution containing an epoxy group and energized. …

    The Proceedings of Mechanical Engineering Congress, Japan 2018(0), J0430303, 2018

    J-STAGE 

  • Vibration characteristics of variable stiffness composite with curvilinear fibers along principal stress direction  [in Japanese]

    YASUDA Masaki , HONDA Shinya , SASAKI Katsuhiko , TAKEDA Ryo

    … <p>Variable stiffness composites induced by the curvilinear reinforcing fibers came to be able to be manufactured by using a tailored fiber placement (TFP) machine. … The experimental results showed that more information including variable thicknesses, fiber densities is necessary to improve the accuracy of numerical analysis.</p> …

    The Proceedings of the Dynamics & Design Conference 2018(0), 143, 2018

    J-STAGE 

  • Production and Evaluation of Curvilinear Fiber Composite Material approximated by linear Elements  [in Japanese]

    SUGAHARA Kyoichi , HONDA Shinya

    … <p>Herein, a new method for approximating curvilinear fiber only by linear elements is introduced. … In this approach, fiber angles in each region is uniquely determined by fixing the boundary line which divides the plate. … FRP designed by this method has low production cost and advantage of curvilinear fibers. …

    The Proceedings of the Materials and Mechanics Conference 2017(0), PS24, 2017

    J-STAGE 

  • Effect of adding cellulose nanofibers to CFRP manufactured by using electrodeposition  [in Japanese]

    KATAGIRI Kazuaki , YOSHIOKA Yayoi , KAKITSUJI Atsushi , SASAKI Katsuhiko , HONDA Shinya , TOMIZAWA Yusuke , MINAMI Sayaka , YAMAGUCHI Shimpei , EHIRO Takuya , OZAKI Tomoatsu , SONOMURA Hirosuke

    … The process was, firstly, the non-crimp carbon fiber fabric was immersed in an electro-activated deposition solution which includes epoxy groups. …

    The Proceedings of the Materials and Mechanics Conference 2017(0), OS1023, 2017

    J-STAGE 

  • Vibration characteristics of CFRTP with curvilinear reinforcing fibers  [in Japanese]

    MIYAIIMA Wataru , MURAKAMI Daichi , HONDA Shinya

    … The present study proposes a new fabrication method of carbon fiber reinforced thermos-plastic (CFRTP) laminates with curvilinear fiber shapes. … Preforms with curved fibers are fabricated by using a tailored fiber placement (TFP) machine which is an application of embroidering technique and enables us to change the fiber orientation angles continuously during placement process. …

    The Proceedings of the Dynamics & Design Conference 2017(0), 340, 2017

    J-STAGE 

  • Optimum design of laminated composite with partial reinforcement by curvilinear fibers  [in Japanese]

    KIMU Daiki , HONDA Shinya

    … This study aims to design optimum partial reinforcement with curvilinear fibers to maximize natural frequencies of laminated composites. … The test specimens are fabricated by the tailored fiber placement machine and VaRTM method, where two kinds of test specimens are prepared based on the optimum design obtained by the numerical calculation. …

    The Proceedings of the Dynamics & Design Conference 2017(0), 338, 2017

    J-STAGE 

  • Evaluation of fiber-spacing and vibration characteristics of CFRP plates fabricated by Tailored Fiber Placement Machine  [in Japanese]

    MINAMI Sayaka , HONDA Shinya

    … The present study fabricates fibrous composite with curvilinear fiber shape by using tailored fiber placement machine which is an application of embroidering machine. … The composite with curved fibers has variable mechanical properties depending on fiber curvature. … Due to this curvature, the overlapping of fiber tows often occurs. …

    The Proceedings of the Dynamics & Design Conference 2017(0), 343, 2017

    J-STAGE 

  • Vibration Characteristics of laminated composite with curvilinear fiber fabricated by tailored fiber placement  [in Japanese]

    HAYASHI Toshiya , TAMAI Kazutoshi , HONDA Shinya , NARITA Yoshihiro

    … <p>The present study fabricates fibrous composite with curvilinear fiber shape by using tailored fiber placement machine which is an application of embroidering machine. … The composite with curved fibers has variable mechanical properties depending on fiber curvature. … First the relationships among fiber density, thickness and curvature are revealed by experimental study with test specimens that has various curvatures. …

    The Proceedings of the Dynamics & Design Conference 2016(0), 157, 2016

    J-STAGE 

  • Optimization of in-plane curvilinear fiber for 3D printed composites  [in Japanese]

    YAMANAKA Yusuke , TODOROKI Akira , UEDA Masato , HIRANO Yoshiyasu , MATSUZAKI Ryosuke

    … However, because of its orthotropic mechanical properties, fiber orientation have to be considered in the design process. … Which enabled to place carbon fiber filament curvilinearly. … Thus in present paper, optimization of in-plane curvilinear fiber placement for the 3D printing and discussion of the manufacturability was conducted. …

    The Proceedings of the Materials and Mechanics Conference 2016(0), OS12-18, 2016

    J-STAGE 

  • J1010202 Multi-objective Optimization of Productivity and Dynamics Strength of Fibrous Composite with Curvilinear Fibers  [in Japanese]

    HAYASHI Toshiya , HONDA Shnya , NARITA Yoshihiro

    … The present study proposes a multi-objective optimization method of productivity and dynamic strength for the fibrous composite plate with curvilinear fibers. … The productivity decreases and fiber density becomes nonuniform with increase in the maximum curvature of curvilinear fibers. …

    The Proceedings of Mechanical Engineering Congress, Japan 2015(0), _J1010202--_J1010202-, 2015

    J-STAGE 

  • F102005 Optimization of composite wing structure by using curvilinear fiber  [in Japanese]

    HONDA Shinya , NARITA Yoshihiro

    … A formulation method of arbitrary shaped curvilinear fibers for laminated fibrous composites is proposed and applied to the multi-objective optimization problem. … Two conflicting objectives employed here are the maximum principal strain around circular hole as a mechanical property and throughput of productivity relating to fiber curvatures. …

    The Proceedings of Mechanical Engineering Congress, Japan 2015(0), _F102005-1-_F102005-3, 2015

    J-STAGE 

  • Multi-objective optimization of curvilinear fiber shapes for laminated composite plates by using NSGA-II

    Honda Shinya , Igarashi Teruki , Narita Yoshihiro

    Composites Part B: Engineering 45(1), 1071-1078, 2013-02

    IR 

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