摘要:
A cap (9) is applied to a securing structure part (1) for securing structure elements (3, 3) using a fastener (5) passed through through-holes (3a) formed in the structure elements (3, 3), and a collar (7) fastened to the tip part (5a) of the fastener (5), and is mounted in a non-engaged state to the tip part (5a) of the fastener (5) and the collar (7). A filler engaging part (91) for engaging with a cured filler (11), said engaging part (91) configured with a female thread that turns about a center axis (CL), is formed on the inner peripheral surface (9e) of the cap (9). The filler engaging part (91) is provided with: a first helical engagement part (91a) formed in the region near the cap inner part of the inner peripheral surface (9e) in the center axis (CL) direction; and a second helical engagement part (91b) formed in the region near the cap opening-end part (9a) in the center axis (CL) direction, the inner diameter of the second helical engagement part (91b) being greater than that of the first helical engagement part (91a), and having a helical direction that is opposite to that of the first helical engagement part (91a).
摘要:
Damage can be prevented even when a large current and high voltage load is imposed. A current generation device (1) uses the power supplied from a power supply device (2) to supply, to a test piece (9) under lightning protection test, current that simulates current flowing when lightning occurs. The current generation device (1) comprises: an electric double-layer capacitor that stores power supplied from the power supply device (2) and discharges the stored power; a semiconductor switch (3) for switching whether the power stored on the electric double-layer capacitor is supplied to the test piece (9) or not; and a protection portion (4) connected between the semiconductor switch (3) and the test piece (9) and used for, when current having a predetermined value or more flows through the semiconductor switch (3), disconnecting the connection between the semiconductor switch (3) and the test piece (9).
摘要:
In order to simplify the equipment for heating a thermosetting resin or a thermoplastic resin and to reduce manufacturing costs of a molded resin article by saving energy, this resin composite material (1A-1I) is formed by combining a fibrous reinforcing material (2) and a thermosetting or thermoplastic matrix resin (3), wherein a metal nanomaterial (4) which self-heats after absorbing electromagnetic waves is added to the matrix resin (3). The frequency of the electromagnetic waves is preferably within the range of 3 MHz to 3 GHz. The metal nanomaterial (4) is preferably nanofibers or nanocoils, and the material is preferably platinum or gold.
摘要:
The purpose of the present invention is to provide a fuel tank, main wings, an aircraft fuselage, an aircraft, and a moving body, which enable working hours and costs involved in a manufacturing process to be reduced, and weight increases to be prevented. The fuel tank comprises a structural member in which carbon fiber reinforced plastic (CFRP) (15) is used, the carbon fiber reinforced plastic (CFRP) (15) comprising a reinforcing material that includes carbon fibers and a matrix that includes plastic. The structural member is formed by laminating a conductive sheet (17) between prepregs of the carbon fiber reinforced plastic (CFRP) (15). In this case, a cut surface (11a) of the structural member formed by cutting the structural member may be exposed on the inside in which fuel is stored.
摘要:
A member is provided with a first composite member (11) which is made from a plastic that is reinforced with heat-conductive carbon fibers comprising metal-coated carbon fibers and/or pitch-based carbon fibers, wherein one end or the heat-conductive carbon fibers is arranged at a heat-generating section and the other end of the heat-conductive carbon fibers is arranged at a heat-dissipating section as observed in the fiber direction.
摘要:
The purpose of the present invention is to provide a fuel tank, main wings, an aircraft fuselage, an aircraft, and a moving body, which enable working hours and costs involved in quality management to be reduced, and weight increases to be prevented. The fuel tank comprises a structural member that uses a carbon fiber reinforced plastic (CFRP) (15) including a reinforcing material containing carbon fiber and a matrix containing plastic. The structural member is formed by laminating conductive sheets (17) between prepregs of the carbon fiber reinforced plastic (CFRP) (15), and being formed with a fastening hole (22) in which a bolt is fastened.
摘要:
The purpose of the present invention is to provide a method for evaluating the bonding state of a bonding section by inspecting a kissing bond using a non-destructive method. Disclosed is a bonding section evaluation method for evaluating the bonding state of a bonding section of a composite material that has the bonding section where a material to be bonded and another material to be bonded are bonded to each other with an adhesive therebetween. In the method, an alternating current signal is applied to the bonding section, a current and a voltage are measured by changing the frequency, evaluation values relating to predetermined electric characteristics are derived on the basis of the current value and the voltage value, which have been obtained by the measurement, the evaluation values are compared with reference relating to the predetermined electric characteristics, and the bonding state of the bonding section is evaluated according to the deviation quantities of the evaluation values from the reference.
摘要:
The objective of the present invention is to provide: a fuel tank that can prevent an increase in weight and can have reduced cost and working time during a production process, a main wing; an aircraft fuselage; an aircraft, and a mobile body. The fuel tank is provided with a structural member that uses a carbon-fiber-reinforced plastic of which the reinforcing material (15) contains carbon fibers and the matrix (17) contains plastic. The matrix (17) is imparted electrical conductivity. Also, a cut surface (11a) That is of the structural member and that is formed by the strcutural member being cut may be exposed within the fuel tank where a fuel is housed.