A zero-Poisson-ratio honeycomb structure and an interlocking assembly manufacturing method thereof are provided. The honeycomb structure is formed by combining a four-pointed star shaped structure and horizontal and vertical honeycomb wall arrays at star corners. The zero-Poisson-ratio honeycomb structure not only has the zero-Poisson-ratio characteristic, but also can achieve respective design of in-plane and out-of-plane mechanical properties. Meanwhile, due to the existence of the horizontal honeycomb walls and the vertical honeycomb walls, the connection of multiple honeycomb walls at angular points in the honeycomb structure is avoided. Moreover, a novel manufacturing mode is provided for the honeycomb structure in addition to prepare the honeycomb structure by utilizing a 3D printing process. The honeycomb structure can be manufactured by combining an interlocking assembly process with resin matrix composites. The performance of the honeycomb structure is further improved at the material level.

An acoustic attenuation panel for a propulsion assembly includes an acoustic front skin having perforations, and a central structure formed from partitions arranged perpendicularly in order to make up cells, wherein the front skin and the central structure form the panel which is made as a single piece and is provided for directly covering a surface of an element of the propulsion assembly forming a rear skin which closes the cells of the central structure at the rear.

The invention relates to a timepiece component made of composite material including at least one reinforcement and one matrix, the reinforcement having a three-dimensional honeycomb structure with a plurality of cells into which the matrix is injected. The invention also concerns a method for manufacturing such a timepiece component.

Certain configurations of multilayer assemblies are described. In certain embodiments, the multilayer assembly can include a core layer, a skin layer and one or more depressions in a surface of the multilayer assembly. In other configurations, the multilayer assembly can include a core layer, a skin layer, one or more depressions in a surface of the multilayer assembly and one or more additional layers.

Adhesive bondlines in a cell-based structural array are thermally cured using tooling blocks inserted into the cells. The tooling blocks have embedded susceptors that are inductively heated by an alternating electromagnetic field generated by an electromagnet.

A method of injecting potting material into at least a portion of a workpiece, comprises positioning a potting press, containing the potting material, over a target area of the workpiece. The target area contains openings, passing entirely through the workpiece. Simultaneously with positioning the potting press over the target area of the workpiece, the potting material is injected into each one of the openings within the target area.

Provided herein are methods for using hempcrete. In some instances, the present disclosure provides methods for 3D printing hempcrete. The 3D printed hempcrete may be printed in tandem with other materials, including hemp-based plastics. Hempcrete formulation may be 3D printed to form a building scaffolding.

A preform for forming a composite structure, such as, but not limited to a panel for a building, house or the like includes a body substantially formed of a reinforcing material. The reinforcing material defines one or more compartments or sections. The compartments are fillable with a granular filler material through which settable liquid matrix material is impregnatable to form the composite structure. There is also disclosed a composite structure, a panel and related methods of forming the preform, the composite structure and the panel.

The present invention provides a self-adhesive prepreg which is characterized by comprising: a base prepreg that is composed of reinforcing fibers and a thermosetting resin composition (I), some or all of which is impregnated into a reinforcing fiber layer that is formed of the reinforcing fibers; an adhesive layer that is composed of a nonwoven fabric which is laminated on at least one surface of the base prepreg so as to be integrated with the base prepreg and a thermosetting resin composition (II) which is laminated on the surface of the nonwoven fabric so as to be integrated with the nonwoven fabric.

A method for manufacturing a cylindrical honeycomb fired body including: preparing a cylindrical honeycomb formed body; obtaining a cylindrical honeycomb dried body by drying the cylindrical honeycomb formed body; calculating predetermined parameters (E.sub.AVE1, E.sub.AVE2, E.sub.AVE3 and E.sub.AVE4) from average values of distance between a center of gravity position O and an outer peripheral contour in a plurality of predetermined angle ranges; specifying a minimum value of the predetermined parameters; obtaining a cylindrical honeycomb fired body by placing the cylindrical honeycomb dried body on a shelf plate and firing it while passing it through a continuous firing furnace, such that the direction in which the cells of the cylindrical honeycomb dried body extend vertically, and a particular location on the outer peripheral side surface determined according to the minimum value is positioned at the front.