Honda Giken Kogyo Kabushiki Kaisha

Honda Motor Co., Ltd.

Keiichi Sato

Yuki Kasahara

Makoto Nasu

Hideaki Murayama

Junichi Kondo

Daiya Yamashita

Nobuo Matsui

Kazuro Kageyama

Shun Kawabe

Hiroshi Kato

Hiroshi Akita

Keizo Matsumoto

Toshiyuki Ohashi

Kazuhiro Miura

Koji Shiraishi

Toshiaki Fujii

Haruo Nakayama

Shinichi Kuroda

Takahiko Kawai

A water-repellent film is formed on a first joint surface of a first member that contains any one of a macromolecular material, a metallic material, and an inorganic material. The water-repellent film is subjected to an activation treatment, and is thereby converted into a film having a high hydrophilicity and a nylon 6 contact angle of less than 25&#xb0;. A second joint surface of a second member that contains at least a thermoplastic resin, which differs from the macromolecular material, is placed on the first joint surface having the film, whereupon the second member is heated and melted. Then, the molten second member is cooled and solidified in order to bond the first joint surface and the second joint surface.

Bonded body made from different materials and method for producing the same

Linking parts are formed on one end of a first resin composite member and on one end of a second resin composite member in order to bond the ends together. For example, the linking parts may be wavy parts containing concave portions and convex portions. In this case, the wavy parts initially are heated and softened. Then, in a molding unit, respective pairs of confronting convex portions are overlapped with each other, and respective pairs of confronting concave portions are utilized to form a non-overlapping space. The overlapped convex portions are pressed and crushed, such that a base thermoplastic resin and fibers contained therein flow toward the non-overlapping space. Thereafter, the thermoplastic resin is cooled and hardened, whereby the first resin composite member and the second resin composite member are bonded integrally to obtain a resin composite structure.

Resin composite structure and method for producing the same

A method for measuring shear load of a fastening tool, which comprises the steps of: positioning an optical fiber sensor on a surface of a fastening tool to be subjected to a measurement, or within the tool but near the surface thereof, so that the optical fiber sensor is positioned along a direction of an axis the fastening tool; and measuring the shear load acting on the fastening tool on the basis of a change in an optical characteristic of the optical fiber sensor that directly corresponds to a deformation of the fastening tool when the shear load is applied to the fastening tool.

Method for measuring shear load of fastening tool

A method is disclosed wherein a portion of a sensor part of an optical fiber sensor is embedded in an adhesive between two joined members, and peeling in an adhesive joint of the two members is detected on the basis of measuring optical characteristics from the optical fiber sensor when the optical fiber sensor is irradiated with light from a light source while one member is vibrated by vibration means. The method comprises the steps of determining the temperature of the two members during measurement on the basis of the optical characteristics from the sensor part exposed outside of the adhesive; determining, on the basis of the temperature determined during the measurement, the measurement range in which the optical characteristics from the optical fiber sensor are measured; and measuring the variation in the optical characteristics from the optical fiber sensor within the determined measurement range while the member is being vibrated by the vibration means.

Method for inspecting peeling in adhesive joint

An object is to provide a process for producing a carbon nanotube (CNT) reinforced composite material, wherein CNT is homogeneously dispersed in a resin to obtain the composite material having an excellent mechanical strength. Hydrophilic CNTsare dispersed in a first solventto prepare a first dispersion liquid. The dispersion liquidand a synthetic resin raw materialare added to a second solventand the resulting mixture is stirred to prepare a third dispersion liquidwhere a second dispersion liquidin which the synthetic resin raw materialis dissolved in the dispersion liquidis dispersed in the solvent. The solventsandare removed from the dispersion liquidto obtain a mixture of the hydrophilic CNTsand the synthetic resin raw materialThe mixture is molded to obtain the composite material in which the synthetic resin is reinforced with the hydrophilic CNTsThe second solventhas smaller solubility of the synthetic resin raw materialthan that of the solventis substantially not compatible to the solventand has volume larger than that of the solventThe dispersion liquidis sprayed on a substrate and the solventsandare removed to obtain the mixture and simultaneously to conduct molding of the mixture.

Process for producing carbon nanotube reinforced composite material

A bond separation inspection method using an optical fiber sensor. The method includes a step of embedding a sensor part of an optical fiber sensor in an adhesive joining a plurality of members together. The sensor part is embedded in the adhesive in such a way that the sensor part undergoes a compressive strain. Separation of the bond is detected on the basis of an optical characteristic of the sensor part when light from a light source is directed into the optical fiber sensor.

Bond separation inspection method using compressive thermal strain in optical sensor part

A method for bonding a plurality of non-magnetic members includes the steps of (1) mating the non-magnetic members via an uncured adhesive interposed between their surfaces to be bonded; (2) applying pressure to their mated portions between a pressing magnet jig and a pressure-receiving, soft-magnetic jig; and (3) curing the adhesive while applying pressure.

Method for bonding non-magnetic members

A shear test apparatus for testing a shear characteristic of a curved panel is provided. The shear test apparatus includes a frame made up of first and second curved side bearing members for bearing a pair of curved sides of the curved panel and first and second flat side bearing members for bearing a pair of flat sides of the curved panel. The second curved side bearing member has an arm extending in a direction perpendicular to the face of the curved panel. The arm has an external force loading point in a position coincident with the center of shear of the curved panel, to prevent twisting of the curved panel.

Curved panel shear test apparatus

A method for producing an intermediate product made of a fiber-reinforced composite composed of a reinforcing fiber impregnated with a thermosetting resin or a thermoplastic resin, comprising: (a) the first process where a plurality of sheets made of the fiber-reinforced composite are laminated to each other, heated under a pressure, and cooled under a pressure to provide a flat plate-shaped laminate; (b) the second process where the flat plate-shaped laminate is cut into a plate; and (c) the third process where the plate is softened by heating, placed on a forming tool, and formed by cooling under a pressure.

Method for producing intermediate product made of fiber-reinforced composite

A honeycomb sandwich panel is produced by (a) mounting a honeycomb core on a lower prepreg laminate skin placed on a forming die, (b) superimposing thereon an upper prepreg laminate skin to cover the honeycomb core, (c) mounting flat plate-shaped elastic jigs on a portion of the resulting assembly where the lower prepreg laminate skin and the upper prepreg laminate skin are overlapping each other, (d) superimposing flat plate-shaped press jigs on the elastic jigs, and (e) heating the assembly under pressure for adhesion forming.

Method for producing honeycomb sandwich panel

An auxiliary jig used with a couple of jigs for forming a structure made of a fiber-reinforced composite by heating under a pressure. The auxiliary jig is provided between the jigs while heating the structure under a pressure to prevent the jigs from falling down and to restrain a resin contained in the fiber-reinforced composite from flowing out from an interspace between the jigs.

Auxiliary jig

A forming jig used for forming a fiber-reinforced composite structure from a plurality of first fiber-reinforced composite preforms la, . . . linearly arranged at given intervals and one or more second fiber-reinforced composite preforms . . . passing through gaps between adjacent two first preforms and intersecting a row of the first preforms . . . comprises a combination of (a) elastic jigs engageable with the intersections of the row of the first preforms . . . and the second preforms . . . , and (b) rigid jigs &prime; attachable to the first preforms . . . and the second preforms in portions of these preforms other than the intersections.

Jig used for formation of fiber-reinforced composite structure and method for formation of fiber-reinforced composite structure using jig

A leading edge structure for an aircraft has an outer wall, an inner wall disposed within the outer wall and including a partition with, the outer wall, the inner wall and the partition jointly defining a hot-air chamber, and a plurality of flow-rectifying fins or disposed in the hot-air chamber and compartmentalizing the hot-air chamber into a plurality of hot-air passages. The outer wall and the flow-rectifying fins are made of a fiber-reinforced synthetic resin and joined to each other by curing. The inner wall and the partition comprise a single component which is made of a fiber-reinforced synthetic resin, and being bonded to the outer wall. Alternatively, the inner wall and the partition are separate from each other and are joined to each other.

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Wako, Japan

Keiichi Sato