Faculty Profiles - ISHIHARA Daisuke

Papers - ISHIHARA Daisuke

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General scenario of the selective mesh stiffening in the pseudoelastic mesh-moving Reviewed

20 - 23 4pages 2018.09

Coupled Finite Element Analysis Model of Structural and Electrical Coupled Analysis for Electrical Contact Resistance

2018.07

A study on the partition method for the maneuverability of insect's flapping flight

ONISHI Minato, ISHIHARA Daisuke, HORIE Tomoyoshi

The Proceedings of The Computational Mechanics Conference ( The Japan Society of Mechanical Engineers ) 2018 ( 0 ) 2018.01

Language：Japanese Publishing type：Research paper (other academic)

Insects have developed their high-performance maneuverability using flapping flight in the process of their evolution. In this study, a partitioned method based on our partition model for their flapping flight, which consists of the subsystems of the wings, the body and the control, is proposed to analyze their maneuverability. Here, the proposed method is applied for a maneuver, which is assumed as the perturbation from the static hovering state. In this case, a specific analysis procedure reduced from the proposed method is the one way coupling from the wing to body subsystems, i.e. the insect flapping wings are analyzed using a finite element method for the fluid-structure interaction, the resulted thrust force acts on the insect's body, and its motion is calculated using the equation of motion of a rigid body. The fundamental performance of the proposed method is demonstrated from the comparison between the present results and the actual observation with respect to the yaw, roll, and pitch as three basic modes of maneuver.

DOI： 10.1299/jsmecmd.2018.31.225

CiNii Article

Other Link： https://ci.nii.ac.jp/naid/130007653641

Polymer-micromachining and driving test of a transmission for insect-like flyer

URAKAWA Kohei, ISHIHARA Daisuke, TAKAGI Masakatsu, MURAKAMI Sunao, UEO Junpei, KUMAGAI Takeru, HORIE Tomoyoshi

The Proceedings of Mechanical Engineering Congress, Japan ( The Japan Society of Mechanical Engineers ) 2018 ( 0 ) 2018.01

Partitioned Iterative Method for Composite Piezoelectric Bimorph Using Structural Shell and Electric Solid Elements

TAKATA Rei, ISHIHARA Daisuke, Chigahalli Ramegowda Prakasha, NIHO Tomoya, HORIE Tomoyoshi

The Proceedings of The Computational Mechanics Conference ( The Japan Society of Mechanical Engineers ) 2018 ( 0 ) 2018.01

Language：Japanese Publishing type：Research paper (other academic)

In general, piezoelectric bimorph for actuators and sensors is thin and includes electrodes and shim plates. Therefore, this study deals with the thin composite piezoelectric bimorph. Solid elements can describe the various type of distributions of electric potential over the thickness. However, shell elements are more appropriate for the thin structural analysis. Therefore, instead of using piezoelectric solid elements or piezoelectric shell elements, solid elements and shell elements are used to simulate the electrical field and the structural field, respectively. The coupled algorithm is based on the block Gauss-Seidel method and a novel transformation method between the solid and shell variables. In the structural analysis, the rule of mixtures about the bending rigidity and the mass is used. In the electrical analysis, the single piezoelectric solver is used to obtain the potential distribution in the composite piezoelectric bimorph using a pseudo-piezoelectric treatment for the conductor. Finally, this study illustrates the very accurate potential distributions in the actuator and sensor modes of the thin composite piezoelectric bimorph.

DOI： 10.1299/jsmecmd.2018.31.236

CiNii Article

Other Link： https://ci.nii.ac.jp/naid/130007653661

A shape simplification modeling of the cambering in insect’s flapping wings using beam and shell Reviewed

Ishihara D., Yokota J., Onishi M., Niho T., Horie T.

Transactions of the Japan Society for Computational Engineering and Science 2018 2018.01

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

In this study, a shape simplification modeling of insect flapping wings is proposed in order to reveal the mechanical roles of the veins in their cambering, since it seems to be unclear how the elastic deformation of insect wings caused by the aerodynamic force results in their camber. In the proposed modeling, the veins are divided into the areas according to their functions, and the macroscopic constitutive relationship in each area is described using the corresponding beam. Furthermore, the wing membrane supported by the veins is described using a rectangular shell. The aerodynamic pressure dominant in the cambering is considered in the static deformation of the model wing. The finite element analysis taking into account the geometric nonlinearity is applied to the proposed model with the setup consistent with the actual insect. As the result, the mechanical roles of the veins in the cambering of insect flapping wings are revealed.

DOI： 10.11421/jsces.2018.20180018

Scopus

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85120066952&origin=inward

Large scale simulation of microscale contact deformation and electric current coupled finite element analysi for electrical contact resistance

NIHO Tomoya, KURAMAE Hiroyuki, YATUDUKA Ryosuke, HORIE Tomoyoshi, ISHIHARA Daisuke

The Proceedings of The Computational Mechanics Conference ( The Japan Society of Mechanical Engineers ) 2018 ( 0 ) 2018.01

Language：Japanese Publishing type：Research paper (other academic)

Electrical contact resistance plays important role in melting and bonding of steel sheets interface for resistance spot welding. Although many researchers have proposed theoretical models of electrical contact resistance, microscale structural and electrical coupled finite element analysis is required to evaluate electrical contact resistance because its characteristics depend on the real contact surface, elasto-plastic large deformation contact behavior, electric current and temperature. In this study, we discuss a microscale structural and electrical coupled finite element analysis for the electrical contact resistance. In this analysis, the structural analysis with elasto-plastic, large deformation and contact effect is performed using measured surface based finite element analysis model and temperature dependent material properties. Deformed shape obtained by the structural analysis is used for the electrical analysis considering temperature dependent electrical resistivity. The electrical contact resistance analyses are performed to discuss the SS–RVE (Statistically Similar Representative Volume Element) size and computational cost, and to confirm the validity of the proposed analysis method. The dependency of the electrical contact resistance on the contact pressure and the temperature are compared with those of Babu's model and experimental results from the viewpoint of these path dependencies.

DOI： 10.1299/jsmecmd.2018.31.257

CiNii Article

Other Link： https://ci.nii.ac.jp/naid/130007653677

Prototyping of Insect-like micro flyer with 2.5-dimensional structure

TAKAGI Masakatsu, ISHIHARA Daisuke, OHIRA Naoto, MURAKAMI Sunao, HORIE Tomoyoshi

The Proceedings of the Bioengineering Conference Annual Meeting of BED/JSME ( The Japan Society of Mechanical Engineers ) 2018 ( 0 ) 2018.01

Microfabrication of hybrid structure composed of rigid silicon and flexible PI membranes Reviewed

Murakami S., Ishihara D., Araki M., Ohira N., Ito T., Horie T.

Micro and Nano Letters 12 ( 11 ) 913 - 915 2017.11

Microfabrication of hybrid structure composed of rigid silicon and flexible polyimide membranes Reviewed

Murakami S., Ishihara D., Araki M., Horie T., Ohira N., Ito T.

2017 IEEE 12th International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2017 840 - 843 2017.08

Strongly Coupled Finite Element Analysis of Electric-Structure-Fluid Interaction in MEMS

No.OS8-02-02, 2pages 2017.08

Design of micro flexible wing mimicking insect flapping flight using fluid-structure interaction analysis Invited

111 - 112 2017.05

表面マイクロマシニングに基づく昆虫規範型マイクロ飛行体の試作

高木方勝，大平直人，石原大輔，村上直，堀江知義

電磁力関連のダイナミクスシンポジウム論文集 13 - 14 2017.05

Passive mechanism of pitch recoil in flapping insect wings Reviewed

Ishihara D., Horie T.

Bioinspiration and Biomimetics 12 ( 1 ) 2017.02

MEMS技術に基づく微小羽ばたき翼の変位変換システムの設計と試作

大平直人, 石原大輔, 村上直, 堀江知義

日本機械学会第29回バイオエンジニアリング講演会論文集 No.16-76 2F23, 2pages 2017.01

Stability analysis and evaluation of staggered coupled analysis methods for electromagnetic and structural coupled finite element analysis Reviewed

Niho T., Horie T., Uefuji J., Ishihara D.

Computers and Structures 178 129 - 142 2017.01

Triply Coupled Effect of Elasto-Plastic Contact Deformation, Electric Current and Thermal Conduction of Steel Sheets Interfaces for Three Sheets Resistance Spot Welding Reviewed

NIHO Tomoya, HORIE Tomoyoshi, IKEGAMI Kyohei, ISHIHARA Daisuke, MATSUNAGA Kenichi, SHU Tokurin

QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY ( JAPAN WELDING SOCIETY ) 35 ( 2 ) 63 - 72 2017.01

Language：English Publishing type：Research paper (scientific journal)

Resistance spot welding of three steel sheets is used in automotive manufacturing. The determination of welding conditions for three steel sheets welding is more difficult than that for two steel sheets welding because in the former case, two interfaces are simultaneously welded. The welding condition to improve the weld strength of thin and thick sheets' interface is required for thin, thick, and thick sheets welding. In addition, avoiding weld spatter is an important technical concern for the three sheets welding. This paper discusses the triply coupled effects of elasto-plastic large deformation contact, electric current, and thermal conduction for the three sheets welding via triply coupled finite element analyses. The triply coupled effects of thin and thick sheets' interface and those of thick and thick sheets' interface are compared to discuss the special characteristics of the triply coupled effects of three sheets welding. The nugget diameter of the thick and thick sheets' interface is larger than that of the thin and thick sheets' interface because the electrical contact resistance and the base electrical resistance of high-strength steels are higher than those of general-strength steels. Furthermore, the chain of the coupled effects of electrical resistances, Joule heat generation, temperatures, and electrical resistances is strong. As the effect of welding current on temperature by the coupling effect for the thick and thick sheets' interface is stronger than that for the thin and thick sheets' interface, the possibility of spatter increases. Increasing the nugget diameter solely for the thin and thick sheets' interface using electrode force is difficult because the effect of the electrode force on the nugget diameter is approximately the same for both interfaces. On the contrary, material characteristics can affect the nugget diameter solely for either of the interfaces. The possibility of spatter increases for the welding condition with a sheet gap because the temperature of the contact edge for the sheets' interface increases.

DOI： 10.2207/qjjws.35.63

Scopus

CiNii Article

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85048223175&origin=inward

Microscale electrical contact resistance analysis for resistance spot welding Reviewed

Niho T., Kubota K., Aramaki H., Kuramae H., Ishihara D., Horie T.

Proceedings of the 7th International Conference on Coupled Problems in Science and Engineering, COUPLED PROBLEMS 2017 2017-January 1152 - 1158 2017.01

Fluid-Structure Interaction Design Approach for Insect-Inspired MEMS Wings

ISHIHARA Daisuke, ARAKI Masateru, OHIRA Nato, MURAKAMI Sunao, HORIE Tomoyoshi

NCTAM papers, National Congress of Theoretical and Applied Mechanics, Japan ( National Committee for IUTAM ) 64 ( 0 ) OS8 - 02-01 2017.01

Authorship：Lead author Language：Japanese Publishing type：Research paper (other academic)

In this study, a FSI design approach of an insect–inspired MEMS wing is proposed. Similar to actual insects, the proposed design actively uses the FSI to create the passive wing motion. Each design solution has a so-called 2.5–D structure for the MEMS technology. The 3–D unsteady monolithic FSI equation system is solved to find the satisfactory design solutions using a projection method. An area of satisfactory design solutions in a design parameter space is found. Each design solution in this area can generate the thrust sufficient to support the weight of the model insect.

DOI： 10.11345/japannctam.64.0_OS8-02-01

CiNii Article

Other Link： https://ci.nii.ac.jp/naid/130007510260

A numerical study on fluid-structure interaction cause of tip path in flapping flexible wings

ISHIHARA Daisuke, HORIE Tomoyoshi

The Proceedings of The Computational Mechanics Conference ( The Japan Society of Mechanical Engineers ) 2017 ( 0 ) 2017.01

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Papers - ISHIHARA Daisuke