A composite structure and method of assembling a composite structure is provided. The composite structure includes a base member having an outer surface and an inner surface. The inner surface defines a channel therethrough. The composite structure further includes a support member coupled to the outer surface. A fabric overwrap is coupled to the support member.

A composite structure and method of assembling a composite structure is provided. The composite structure includes a base member having an outer surface and an inner surface. The inner surface defines a channel therethrough. The composite structure further includes a support member coupled to the outer surface. A fabric overwrap is coupled to the support member.

A dispenser apparatus for a curable liquid material is disclosed. The apparatus comprises a flexible bag defining a first compartment for accommodating a first component of a curable liquid material, and a second compartment for accommodating a second component of the curable liquid material and adapted to communicate with the first chamber to enable mixing of the first and second components to initiate curing of the curable liquid material. A first clamp temporarily prevents mixing of the first and second components, and an elongate nozzle communicates with the second compartment to dispense the mixed curable liquid material therefrom. A second clamp temporarily prevents passage of the curable liquid material from the second compartment to the nozzle.

A composite element and a method of manufacturing the same. The composite element comprises a first skin plate and second skin plate, which are manufactured as separate pieces and are assembled in a separate phase. At least the first skin plate comprises several protrusions on an outer surface of the plate. The protrusions serve as local stiffeners and are further stiffened by means of one or more additional composite structures arranged inside the protrusions.

A composite element and a method of manufacturing the same. The composite element comprises a first skin plate and second skin plate, which are manufactured as separate pieces and are assembled in a separate phase. At least the first skin plate comprises several protrusions on an outer surface of the plate. The protrusions serve as local stiffeners and are further stiffened by means of one or more additional composite structures arranged inside the protrusions.

An apparatus for securing first and second skins to a core in a composite rotor blade includes an elongated member configured to be installed through a passage in the core of the composite rotor blade. The elongated member has a first end configured to be attached to an outer surface of the first skin and a second end configured to be attached to an outer surface of the second skin. The apparatus also includes a first patch configured to adhere the first end to the outer surface of the first skin, and a second patch configured to adhere the second end to the outer surface of the second skin such the elongated member extends from the outer surfaces of the first and second skins through the passage in the core.

A friction disk may comprise a first wear surface formed from a carbon fiber-carbon matrix composite material. A wear plug may be located in an opening defined by the carbon fiber-carbon matrix composite material. The wear plug may extend axially from the wear surface. The wear plug may comprise a rod or a particulate.

A friction disk may comprise a first wear surface formed from a carbon fiber-carbon matrix composite material. A wear plug may be located in an opening defined by the carbon fiber-carbon matrix composite material. The wear plug may extend axially from the wear surface. The wear plug may comprise a rod or a particulate.

According to one embodiment, a method, computer system, and computer program product for 3D printing is provided. The present invention may include identifying one or more physical objects to be infused within an object being 3D printed; generating at least one digital model of the one or more identified physical objects; analyzing a digital model of the object being 3D printed; determining one or more identified physical object that can be infused within the object being 3D printed; modifying the digital model of the object being 3D printed to comprise an internal physical object infused within the object being 3D printed; and printing the object being 3D printed over the internal physical object. Additionally, according to one embodiment, a method for manufacturing a three-dimensional product is provided. Additionally, according to one embodiment, a data processing device for 3D printing is provided.

Examples relate to automated stringer compaction and forming techniques. An example technique involves heating one or more layers of fibrous material having thermally activatable material above an activation temperature of the thermally activatable material and forming, by a forming tool, the one or more layers having thermally activatable material into a first fabric subelement. The forming tool is adjusted based on a first set of dimensions corresponding to the first fabric subelement. The technique also involves removing the first fabric subelement from the forming tool, integrating the first fabric subelement into a preform to form a complete element where the preform includes at least the first fabric subelement and a second fabric subelement. The technique further involves infusing, within a mold tool, the complete element with resin, and curing the complete element infused with resin to form the composite structure (e.g., a composite stringer).