An aircraft water tank includes a conical surface of a skirt portion and a conical surface of an inner liner attached together using an adhesive, with an identical adhesive used in forming a fiber-reinforced resin layer on the inner liner via a filament winding method. When attaching with the adhesive, the adhesive is expelled at the outer circumferential edge of the skirt portion from between the conical surface of the skirt portion and the conical surface of the inner liner. Reinforcement fibers are applied on top of the protruding adhesive, and the adhesive impregnates into the reinforcement fibers. The protruding adhesive and the reinforcement fibers form a reinforcing member which connects a uniform stress surface of the skirt portion to a uniform stress surface of the inner liner located radially outward of the skirt portion.

A FRP tubular body includes a tubular fiber structure formed by winding a reinforced fiber sheet made of fabric. The reinforced fiber sheet includes first reinforced fiber bundles arranged such that a yam main axis direction extends in a circumferential direction of the fiber structure and second reinforced fiber bundles arranged such that a yarn main axis direction extends in an axial direction of the fiber structure. The reinforced fiber sheet includes a starting end, a finishing end, and a general portion located between the starting end and the finishing end. The general portion includes the first reinforced fiber bundles and the second reinforced fiber bundles. At least one of the starting end or the finishing end is a decreased portion that is smaller than the general portion in an amount of reinforced fibers per unit length in the circumferential direction of the fiber structure.

A dynamic correction system of a manufacturing process using wire is provided. The dynamic correction system includes a driving device, a path sensor, and a controller. The driving device is configured to: drive a carrier with a motion parameter and encapsulate the carrier with a wire. The path sensor is configured to obtain an actual path information of the wire encapsulating the carrier. The controller is configured to: obtain an actual path of the wire encapsulating the carrier according to the actual path information; obtain an actual path difference between a target path and the actual path; determine whether the actual path difference is greater than a predetermined error; and, when the actual path difference is greater than the predetermined error, control the driving device to change the motion parameter to cause the actual path of the wire encapsulating the carrier to approach the target path.

A method for manufacturing a high pressure tank capable of uniformly heating a thermosetting resin in a short time is provided. A method for manufacturing a high-pressure tank including: a step (a) of preparing a tank intermediate product including a fiber-reinforced resin layer formed by winding a carbon fiber impregnated with a thermosetting resin around a liner including a cap attached thereto; and a step (b) of performing a process for thermosetting the fiber-reinforced resin layer of the tank intermediate product by induction-heating the fiber-reinforced resin layer using induction-heating means, in which: the induction-heating means includes first induction-heating means for induction-heating a trunk part of the tank intermediate product and second induction-heating means for induction-heating a dome part of the tank intermediate product; and a temperature of the trunk part of the tank intermediate product and a temperature of the dome part thereof are controlled independently.

Disclosed are a method for producing a laminate including a step of laminating a resin impregnated fiber reinforced composition layer on a metal member, wherein the method includes a step of forming a resin coating on the metal member and a step of laminating a resin impregnated fiber reinforced composition layer containing a resin impregnated fiber reinforced composition containing (I) 20 to 80% by mass of a polymer having a melting point and/or a glass transition temperature of 50 to 300° C., and (C) 20 to 80% by mass of a reinforcing fiber
(provided that the sum of the component (I) and the component (C) is taken as 100% by mass) via the above resin coating; and a laminate obtained by the method.

The present invention is directed to a new concept for an internal metallic tank of large-scale high-pressure gasholder in which pluralities of internal tanks have been accumulated like a honeycomb structure and for the manufacturing processes of the internal metallic tank.

The high pressure tank includes a liner, a hoop layer, and a helical layer. The liner includes a cylindrically-shaped trunk portion and dome portions disposed on both ends in an axial direction of the trunk portion. In the hoop layer, a fiber impregnated with a resin is wound in hoop winding and laminated to cover the trunk portion. In the helical layer, a fiber impregnated with a resin is wound in helical winding and laminated to cover at least the dome portions. An interface strength between the fiber and the resin on the hoop layer covering the trunk portion has a low fatigue strength and a high tensile strength compared with an interface strength between the fiber and the resin on the helical layer covering the dome portions.

A method of manufacturing a wrapped object, having a first segment and a second segment connected to each other by a curved transition segment having a common tangent with the first segment and a common tangent with the second segment, respectively. The method includes providing a mandrel with a surface structure to define at least part of the shape of the first segment, of the shape of the second segment and of the shape of the transition segment in between, and wrapping, one or more elongate elements over the mandrel and bonding the elongate element(s) to itself and/or each other so as to provide the first segment, the second segment and the transition segment as a continuous structure. The mandrel is provided with a fortification to support the element(s) forming the transition segment against inward-directed forces while wrapping and/or bonding the element(s) to form the transition segment.

A gas tank liner comprises: a cylindrical section formed using a first resin; and a dome section formed using a second resin, the dome section being arranged at each axially opposite end of the cylindrical section, wherein either one of the first resin or the second resin has a higher linear expansion coefficient and higher yield strain than the other, the yield strain being the threshold of strain that, when met, makes the first resin or the second resin incapable of restoring its original state if the first resin or the second resin strains and yields in response to the application of external force.

A method for manufacturing a high pressure tank capable of uniformly heating a thermosetting resin in a short time is provided. A method for manufacturing a high-pressure tank including: a step (a) of preparing a tank intermediate product including a fiber-reinforced resin layer formed by winding a carbon fiber impregnated with a thermosetting resin around a liner including a cap attached thereto; and a step (b) of performing a process for thermosetting the fiber-reinforced resin layer of the tank intermediate product by induction-heating the fiber-reinforced resin layer using induction-heating means, in which: the induction-heating means includes first induction-heating means for induction-heating a trunk part of the tank intermediate product and second induction-heating means for induction-heating a dome part of the tank intermediate product; and a temperature of the trunk part of the tank intermediate product and a temperature of the dome part thereof are controlled independently.