Abstract: Provided is a composite material assembly (100) includes: a first composite material member (1) in which a first hole (51) is formed, a second composite material member (2) in which a second hole (52) is formed, and a fastener (3) that is to be inserted through the first hole (51) and second hole (52) to thereby connect the first composite material member (1) to the second composite material member (2). A first chamfered section (51C) is formed on at least one of both ends of the first hole (51), and a second chamfered section (52C) is formed on at least one of both ends of the second hole (52).

Abstract: An object of the present invention is to prevent accumulation of moisture which has entered inside a honeycomb sandwich panel used for a stressed-skin structure of an aircraft. A reinforcing structure includes an outer panel constituting an outer shell of a tailplane and a honeycomb sandwich panel reinforcing the outer panel. The honeycomb sandwich panel includes a honeycomb core having a plurality of cells, an outer skin joined on the front side of the honeycomb core and disposed on the side of the outer panel, and an inner skin joined on the back side of the honeycomb core and disposed on the inner side of the tailplane. The inner skin has drainage channels formed therein through which each of the plurality of cells communicates with the outside of the honeycomb sandwich panel.

Abstract: Provided is a composite material assembly (100) includes: a first composite material member (1) in which a first hole (51) is formed, a second composite material member (2) in which a second hole (52) is formed, and a fastener (3) that is to be inserted through the first hole (51) and second hole (52) to thereby connect the first composite material member (1) to the second composite material member (2). A first chamfered section (51C) is formed on at least one of both ends of the first hole (51), and a second chamfered section (52C) is formed on at least one of both ends of the second hole (52).

Abstract: To reduce a time required for repairing a honeycomb core sandwich panel. A repair method according to the present invention is a repair method, in which a repair patch 20 is disposed on a repair target portion that exists on the side of a repair surface 1A of a honeycomb core sandwich panel 1, the honeycomb core sandwich panel 1 being formed by sandwiching a honeycomb structured core 10 with a plurality of cells between skins 11 and 12, the method including: a heating step of heating the repair patch 20; and a cooling step of cooling the honeycomb core sandwich panel 1 from the side of a second surface 1B opposing the repair surface 1A of the honeycomb core sandwich panel 1.

Abstract: The present invention sufficiently heats a repairing material while preventing change in quality of a base material provided with the repairing material so as to securely bond the repairing material to a repair target portion. The repair method of the present invention, in order to repair a repair target portion 14 existing in an outer panel 1, includes: a repairing material disposing step of disposing a repairing patch 21 including a resistance heating element 23 and a carbon fiber reinforced resin, and an adhesive 22A including a thermosetting resin before being hardened for bonding the repairing patch 21 on the repair target portion 14; and a heating-hardening step of heating and hardening the thermosetting resin of the adhesive 22A by causing the resistance heating element 23 to generate heat through supply of electricity thereto.

Abstract: The present invention provides a device which can uniformize heat distribution by using an existing heater mat for repairing or joining members. A heat dispersion device includes a bag with a fluid sealed inside, and is disposed on a second surface of a heater mat which has a first surface to be directed toward an object to be heated and the second surface opposite to the first surface. The fluid inside the bag is preferably heated with a heat source.

Abstract: The present invention provides a method for repairing a lightning protection material that is made of a metal material and is provided along a surface of a member formed by using a fiber reinforced resin includes: bonding a repair material made of a metal material over a lost region of the member where the lightning protection material is lost by using a liquid adhesive and a sheet-shaped holder that contains and holds the adhesive and is arranged at the lost region.

Abstract: The present invention sufficiently heats a repairing material while preventing change in quality of a base material provided with the repairing material so as to securely bond the repairing material to a repair target portion. The repair method of the present invention, in order to repair a repair target portion 14 existing in an outer panel 1, includes: a repairing material disposing step of disposing a repairing patch 21 including a resistance heating element 23 and a carbon fiber reinforced resin, and an adhesive 22A including a thermosetting resin before being hardened for bonding the repairing patch 21 on the repair target portion 14; and a heating-hardening step of heating and hardening the thermosetting resin of the adhesive 22A by causing the resistance heating element 23 to generate heat through supply of electricity thereto.

Abstract: The present invention sufficiently heats a repairing material while preventing change in quality of a base material provided with the repairing material so as to securely bond the repairing material to a repair target portion. The repair method of the present invention, in order to repair a repair target portion 14 existing in an outer panel 1, includes: a repairing material disposing step of disposing a repairing patch 21 including a resistance heating element 23 and a carbon fiber reinforced resin, and an adhesive 22A including a thermosetting resin before being hardened for bonding the repairing patch 21 on the repair target portion 14; and a heating-hardening step of heating and hardening the thermosetting resin of the adhesive 22A by causing the resistance heating element 23 to generate heat through supply of electricity thereto.

Abstract: To provide a structure maintenance supporting system that can accurately and quickly associate any position on a structure with a position in the drawing of the structure that is referred to at the time of maintenance. A maintenance supporting system includes an image displaying device that displays an image of a structure to be referred to when any damaged position on the structure is maintained, and a processing unit that performs calculation to associate the damaged position with a position in the image. The processing unit includes a damaged position calculating section that calculates a target coordinate which is the coordinate of the damaged position using known coordinates given to a plurality of reference points, and a position specifying section that specifies a position in the image corresponding to the target coordinate with an indication on the image displaying device.

Abstract: There is provided a drainage system of an aircraft which discharges moisture having entered inside horizontal tails, which are structures of an airframe of an aircraft, toward the rear end of a fuselage, the drainage system including: a drainage channel which includes an introduction end and a discharge end, and by a capillary action delivers moisture introduced from the introduction end toward the discharge end; and a heater which heats and dries the moisture delivered through the drainage channel. The drainage channel of the present invention is preferably composed of a paper drainage material. It is also preferable that the introduction end of the drainage channel is provided in a lowermost region in the vertical direction within an area in which moisture can accumulate inside the horizontal tails while the aircraft is parked.

Abstract: The present invention sufficiently heats a repairing material while preventing change in quality of a base material provided with the repairing material so as to securely bond the repairing material to a repair target portion. The repair method of the present invention, in order to repair a repair target portion 14 existing in an outer panel 1, includes a repairing material disposing step of disposing a repairing patch 20 and an adhesive 21A to the repair target portion 14; and a heating-hardening step of heating and hardening the adhesive 21A by irradiating it with electromagnetic waves.

Abstract: The present invention relates to a repair method using a pre-cured repairing patch, and a repaired product obtained from repairing using the repairing patch, and the present invention securely bonds a repairing patch, where an out-of-plane stiffness is required, to a repair target. In order to cover a repair target portion 23 formed in an outer panel 2 with a repairing patch 30, and bond the repairing patch 30 to a repair target, repairing plates 31, 32 that are formed of fibers and thermosetting resin, and pre-cured before repairing are used as the repairing patch 30, and a laminating step S4 of laminating the repairing plates 31, 32, and a bonding step S7 of bonding the repairing plates 31, 32 to each other are performed.

Abstract: An object of the present invention is to visualize an internal structural members, which are covered with a skin and therefore unrecognizable to the naked eye, from the outside of the skin. There is provided an internal structure visualization method applied to a main wing of an aircraft, which includes a skin with a front surface and a back surface and structural members supporting the skin from the back surface side, to display, when necessary, a trace map composed of lines extending along projection regions of the structural members, wherein functional lines, which are a developing element of the trace map, are provided along the projection regions of the front surface, and the trace map is displayed by performing a predetermined process on a predetermined region of the front surface where the functional lines are provided.

Abstract: An object of the present invention is to prevent accumulation of moisture which has entered inside a honeycomb sandwich panel used for a stressed-skin structure of an aircraft. A reinforcing structure includes an outer panel constituting an outer shell of a tailplane and a honeycomb sandwich panel reinforcing the outer panel. The honeycomb sandwich panel includes a honeycomb core having a plurality of cells, an outer skin joined on the front side of the honeycomb core and disposed on the side of the outer panel, and an inner skin joined on the back side of the honeycomb core and disposed on the inner side of the tailplane. The inner skin has drainage channels formed therein through which each of the plurality of cells communicates with the outside of the honeycomb sandwich panel.

Abstract: There is provided a drainage system of an aircraft which discharges moisture having entered inside horizontal tails, which are structures of an airframe of an aircraft, toward the rear end of a fuselage, the drainage system including: a drainage channel which includes an introduction end and a discharge end, and by a capillary action delivers moisture introduced from the introduction end toward the discharge end; and a heater which heats and dries the moisture delivered through the drainage channel. The drainage channel of the present invention is preferably composed of a paper drainage material. It is also preferable that the introduction end of the drainage channel is provided in a lowermost region in the vertical direction within an area in which moisture can accumulate inside the horizontal tails while the aircraft is parked.

Abstract: A repair method according to the present invention is a method for repairing a honeycomb core sandwich panel, the method including: a repair patch disposing step of disposing a repair patch and an adhesive on at least one of a first surface and a second surface of the panel, the first outer skin being located on the first surface, and the second outer skin being located on the second surface; a panel restraining step of sandwiching the panel and the repair patch from both surface sides of the first surface and the second surface and thereby restraining the panel; and a heating step (thermal curing step) of heating the adhesive while the panel is restrained.

Abstract: An aircraft appearance inspection method includes an initial data acquisition step of acquiring initial data at an initial time, an inspection data acquisition step of acquiring inspection data at the time of inspection, and a difference acquisition step of acquiring differences between the initial data and the inspection data. A first step through a third step are performed at the initial time and at the time of inspection. The first step is to radiate light toward an applicable area of an airframe of an aircraft through a member having a repetitive pattern, in which a predetermined shape is repeated, to display on the airframe a repetitive pattern corresponding to the repetitive pattern of the member. The second step is to image the applicable area over which the repetitive pattern is displayed. The third step is to acquire data of an image taken of the applicable area.

Abstract: A method of repairing a composite material is provided in which a frustum-shaped portion of a composite material is removed, and the composite material and a repair material are bonded with each other while evacuating. The repair method includes step S2 of removing a damaged part 11 from the front side so as to pass through in the thickness direction while leaving a support wall protruding inward in the radial direction from the periphery of the top face of the frustum-shaped portion; step S3 of sealing the back side by placing a sealing plate, which is inserted from the front side into a through hole formed by the removing step, on the support wall; step S5 of placing the repair material through an adhesive on the composite material where the frustum-shaped portion has been removed; and step S6 of evacuating in a state in which the front side is sealed.

Abstract: The present invention provides a method for repairing a lightning protection material that is made of a metal material and is provided along a surface of a member formed by using a fiber reinforced resin includes: bonding a repair material made of a metal material over a lost region of the member where the lightning protection material is lost by using a liquid adhesive and a sheet-shaped holder that contains and holds the adhesive and is arranged at the lost region.