Disclosed herein are a thermoplastic resin sheet having excellent mechanical strength and excellent conformability during molding, a laminated sheet using such a thermoplastic resin sheet, and a molded body. The thermoplastic resin sheet includes a thermoplastic resin containing a polyolefin resin, a polyamide resin, and a compatibilizer, wherein the compatibilizer is a modified elastomer having a reactive group that reacts with the polyamide resin. The laminated sheet includes a base layer containing a polyolefin resin and the thermoplastic resin sheet bonded to one surface of the base layer. The molded body includes a base body containing a polyolefin resin and the thermoplastic resin sheet or the laminated sheet bonded to one surface of the base body.

In an example, a composite structure having a variable gage is described. The composite structure includes a first end having a first gage, a second end having a second gage, which is less than the first gage, a plurality of continuous plies, and a plurality of drop-off plies. Each continuous ply extends from the first end to the second end. Each drop-off ply includes a tip having a tapered shape. Each drop-off ply extends from the first end to a respective position of the tip of the drop-off ply between the first end and the second end. The tips of the plurality of drop-off plies are arranged in a monotonically-inward pattern.

In an example, a composite stringer assembly includes a composite stringer, a radius filler, and an overwrap layer. The composite stringer includes: (i) a skin flange configured to be coupled to a support structure, (ii) a web, (iii) a lower corner portion of the composite stringer extending from the skin flange to the web, and (iv) an inner surface of the composite stringer extending along the skin flange, the lower corner portion, and the web. The radius filler includes a first surface coupled to the inner surface at the lower corner portion, a second surface configured to couple to the support structure, and a third surface extending between the first surface and the second surface. The overwrap layer is coupled to the inner surface at the web, the third surface of the radius filler, and the support structure.

The present disclosure relates to custom additively manufactured core structures and the manufacture thereof In one aspect, a panel for use in a transport structure includes first and second face sheets, and an additively manufactured (AM) core affixed between the first and second face sheets. The AM core is foldable such that at least one portion of the AM core is movable between a folded position and an unfolded position. In another aspect of the disclosure, a method for producing a panel for use in a transport structure includes additively manufacturing a core is disclosed.

A prepreg including an epoxide resin matrix system and fibrous reinforcement, at least partially impregnated by the epoxide resin matrix system, the epoxide resin matrix system having the components: a. a mixture of (i) at least one epoxide-containing resin and (ii) at least one catalyst for curing the at least one epoxide-containing resin; and b. a plurality of solid fillers for providing fire retardant properties to the fibre-reinforced composite material formed after catalytic curing of the at least one epoxide-containing resin, and wherein the fibrous reinforcement is a woven fabric ply of an interwoven mixture of glass fibres and carbon fibres, the woven fabric ply has a weight of from 350 to 550 g/m.sup.2 and is from 40 to 95 wt % glass fibres and from 5 to 60 wt % carbon fibres, each based on the weight of the woven fabric ply, and the proportion by weight of carbon fibres, expressed as C in wt %, in the woven fabric ply is defined by the formula:

[00001]$C\ge \left(-0.0048W+2.0858\right)\times 100\%,$ where W is the weight of the woven fabric ply in g/m.sup.2,
and the proportion by weight of glass fibres, expressed as G wt %, in the woven fabric ply is defined by the formula: G=(100−C) %.

The present invention relates to the field of materials science, applied to the body of a wagon for transporting loads, also including the systems of hoppers and hatches, if applicable, manufactured from composite materials that provide reduced weight in comparison to the similar conventional parts thereof manufactured from steel. The present invention also relates to the development of wagon bodies and the systems thereof such as hoppers and hatches, if applicable, which dispense with the need to use structural metal materials, contributing to the reduced weight thereof, providing lightness during operation and corrosion resistance, and to a specific design, which makes the lightweight material capable of withstanding the loads and forces to which the wagons are subjected during operation.

An item comprising a body which comprises a fiber composite structure incorporating at least one sensor for sensing a parameter and/or at least one antenna for wireless communication, and circuitry, wherein the fiber composite structure is formed of a plurality of structural layers or laminations which are formed from a sheet which is impregnated with a graphene-containing resin.

The present invention addresses the problem of providing a method for molding, using a honeycomb core, a composite material structure that is high-quality, low cost, and leaves less voids. The present disclosure addresses the problem of providing a method for molding, using a honeycomb core, a composite material structure with which it is possible to reduce dimples in a composite material skin at low cost. According to a method for molding a composite material structure of the present disclosure, an uncured composite material honeycomb sandwich panel in which prepreg is laminated on upper and lower surfaces of a honeycomb core via an adhesive is covered with a vacuum bag and placed in an autoclave. After that, the vacuum bag is evacuated and, while the evacuation is being continued, is heated and pressurized by the autoclave to cure a matrix resin of the prepreg and achieve adhesion to the honeycomb core.

A prepreg having high processability and laminating performance and a method to produce such a prepreg in an industrially advantageous way is described, the prepreg comprising at least the components [A] to [E] shown below, and having a structure incorporating a first layer composed mainly of the component [A] and a first epoxy resin composition that contains the components [B] to [D] but which is substantially free of the component [E], and a second layer composed mainly of a second epoxy resin composition that contains the components [B] to [E] and which is disposed adjacent to each surface of the first layer, the second epoxy resin composition being characterized in that its component [D] has a weight-average molecular weight of 2,000 to 30,000 g/mol and accounts for 5 to 15 parts by mass relative to the total quantity of its components [B] to [E], which accounts for 100 parts by mass, [A] carbon fiber, [B] epoxy resin, [C] curing agent, [D] thermoplastic resin, and [E] particles containing a thermoplastic resin as primary component and having a volume-average particle diameter of 5 to 50 μm.

An object of the present invention is to provide a sound insulating sheet member that has high sound-insulating performance which exceeds mass law while being relatively light weight, that is highly flexible in design, excellent in versatility, and easy to manufacture so that productivity and economic efficiency can be improved, and a sound insulating structural body or the like using the same. The object thereof is achieved by using a sound insulating sheet member comprising at least a sheet having rubber elasticity and a plurality of resonant portions, wherein the resonant portions are provided in contact with a sheet surface of the sheet, each of the resonant portions including a base part and a weight part, and the weight part being supported by the base part and having a larger mass than the base part.