A honeycomb structural body includes multiple cores, at least face sheet, and at least one reinforcement sheet. The multiple cores each have a honeycomb structure, and are bonded to each other with foamed adhesive in a direction in which the number of multiple pores formed by the honeycomb structure increases. The at least one face sheet is adhered to the multiple cores so as to cover the multiple pores. The reinforcement sheet is placed between the multiple cores and the at least one face sheet, at a position where the reinforcement sheet covers the foamed adhesive.

A sandwich structure configured to be secured with a mechanical fastener includes a core assembly, which includes a polymer component configured for supporting a mechanical fastener connector insert. The core assembly further includes an open cellular component formed from a plurality of self-propagating photopolymer waveguides positioned around the polymer component, wherein a first portion of the plurality of self-propagating photopolymer waveguides is secured to and extends from the polymer component. Further included is a first face sheet secured to a first side of the core assembly, wherein the first portion of the plurality of self-propagating photopolymer waveguides has a distal end spaced apart from the polymer component and secured to the second face sheet.

A container that provides for control of fluid flow in the event of a failure of the container is disclosed. In accordance with embodiments of the present invention, a container is presented that includes a container wall; and one or more flow impeding structures coupled to the container wall, wherein at least one of the one or more flow impeding structures is a multi-sheet layer that deforms to impede flow in a failure of the container wall. In some embodiments, the multi-sheet layer includes cavities formed between individual sheets.

An acoustic liner for a turbine engine, the acoustic liner includes a support layer that includes a set of partitioned cavities with open faces, a perforated sheet that includes a set of perforations with corresponding inlets, the perforated sheet supported by the support layer such that perforations are in overlying relationship with the open faces to form paired perforations and cavities that define acoustic resonator cells, and a coating applied to the perforated sheet.

A medical use honeycomb structure having a plurality of through-holes extending in one direction, wherein an outer peripheral section of the medical use honeycomb structure has a through-hole groove formed by incomplete side walls of the through-hole, and a through-hole inlet adjacent to the through-hole groove.

A flexible energy absorbing system comprising a material coated, impregnated and/or combined with a strain rate sensitive substance is disclosed. It is formed so as to define repeating adjacent cells, each cell having a re-entrant geometry such that, upon impact, the material locally densifies at the impact site.

A roofing material comprising a substrate constructed at least in part of a carbon fiber material and a weather-resistant or water-proof coating affixed or applied to the substrate. Aesthetic or reflective materials may be applied to the exposed portion of said roofing material. The substrate may include woven and/or nonwoven fibers. The substrate may comprise a single layer or two or more layers of carbon-fiber material laminated by one or more binding layer. In addition, the present roofing material may include a bonding agent or primer for promoting adhesion between one or more carbon fiber substrate layers and/or a carbon fiber substrate layer and the weather-resistant or water-proof coating.

A composite body of the present invention includes a base and an oxide layer arranged on the base, the oxide layer containing more than 45% by volume of a perovskite-type oxide phase. The composite body may include a first member, a second member, and a joining portion that joins the first member and the second member, at least one of the first member and the second member serving as the base, and the joining portion serving as the oxide layer. The composite body may include the base and a covering portion that covers the whole or part of a surface of the base, the covering portion being formed of the oxide layer.

A honeycomb core having a lattice structure which includes a resin-impregnated matrix, a method for producing such a honeycomb core, a sandwich panel having such a honeycomb core, and use of such a honeycomb core or such a sandwich panel in automobile construction. The matrix is impregnated inhomogeneously with the resin.

According to some illustrative embodiments, a protective product is provided that includes: an envelope having a two-layer wall structure, the two-layer wall structure including a) a first outer paper layer, and b) a second inner paper layer, wherein the second inner paper layer includes width-wise positional variations of the side surface of the second inner sheet that cushions items placed within an inner pouch of the envelope, and forms an interior wall of the inner pouch of the envelope and directly contacts the items placed within the inner pouch of the envelope. In some preferred implementations, the width-wise positional variations of the side surface of the second inner paper layer includes pleats, undulations and/or embossments, and, preferably, the pleats, undulations and/or embossments include ridges that extend perpendicular or substantially perpendicular to an outlet of the envelope.