An acoustic attenuation structure comprises a gas permeable composite facesheet, a cellular core, and an impermeable backing. The gas permeable composite facesheet has a designated porosity. The designated porosity causes the permeability of the gas permeable composite facesheet. The gas permeable composite facesheet comprises a carbon fiber fabric. The cellular core is bonded to the gas permeable composite facesheet using a resin of the gas permeable composite facesheet without any additional adhesive. The impermeable backing is connected to the cellular core.

Described is a micro-lattice damping material and a method for repeatable energy absorption. The micro-lattice damping material is a cellular material formed of a three-dimensional interconnected network of hollow tubes. This material is operable to provide high damping, specifically acoustic, vibration or shock damping, by utilizing the energy absorption mechanism of hollow tube buckling, which is rendered repeatable by the micro-lattice architecture.

The present disclosure relates to a bonding system comprising a first substrate, a second substrate, an adhesive, in contact with a first contact surface and a second contact surface, and a plurality of solder elements positioned in the adhesive. Each solder element has a plurality of indentations located on the perimeter of the solder element and the plurality of indentations receiving a portion of the adhesive. Also, the present disclosure relates to a bonding method to produce a solder-reinforced adhesive bond joining a first substrate and a second substrate.

An acoustic insert comprises a sleeve having a first end and a second end. The sleeve comprises segments between the first end and the second end. A first acoustic septum is placed within the sleeve at a first depth. A second acoustic septum placed within the sleeve at a second depth.

The present invention proposes a novel construction system consisting of the attachment of modified hyperboloid shaped-structural elements called laminate cells which, when working together, create a structural system with integrated cover having the capacity of absorbing and transmitting stresses in all directions and orientations.

An autonomous vessel comprises a hull. The hull contains a plurality of subsystems. The subsystems comprise a sensor subsystem configured to sense potential target information regarding a potential target, a database subsystem configured to store target characterization information, a processing subsystem coupled to the sensing subsystem and to the database subsystem, and an ordnance subsystem. The processing subsystem is configured to process the potential target information according to the target characterization information to confirm the potential target as being a confirmed target. The ordnance subsystem comprises an ordnance magazine configured to store ordnance, the ordnance deliverable by an unmanned combat aerial vehicle (UCAV). The ordnance is deployable against the confirmed target.

A subsea system having a coated insert at least partially embedded within a buoyant member of the device. The insert includes a retention member configured to attach a peripheral device to the buoyant member. The compliant layer on the insert is disposed between the insert and the buoyant member.

Protrusion portions and recess portions are formed on a metal layer. The protrusion portions are repeatedly formed in a lattice shape at a pitch of P. Similarly, the recess portions are repeatedly formed in the lattice shape at the pitch of P. The protrusion portions and the recess portions are arranged in the same arrangement direction and arranged shifted to each other by half the pitch in the arrangement direction. The protrusion portions and the recess portions are formed independently of each other without contacting each other. In order to allow a multilayer tape to reliably follow the bending deformations of a power cable (submarine cable) in all directions, in an arbitrary cross-section taken in the longitudinal direction of the multilayer tape (in the axial direction of an impermeable layer), the protrusion portions or the recess portions are necessarily arranged at predetermined intervals.

The present invention provides an adhered structure in which members of the same or different materials are adhered to each other with a high adhesive strength and a method for producing the adhered structure. The adhered structure of the present invention comprises a first solid member, a second solid member, and an adhesive member. The first solid member and the second solid member are adhered to each other through the adhesive member. The adhesive member contains a polymer. The polymer is chemically bonded to the first solid member and the second solid member.

A laminate structure may include: an aluminum layer; a glass composite layer adjacent to the aluminum layer; and/or a carbon composite layer adjacent to the glass composite layer, opposite to the aluminum layer. The glass composite layer may include one or more glass-fiber-reinforced thermoplastic prepreg plies. The carbon composite layer may include one or more carbon-fiber-reinforced thermoplastic prepreg plies. A laminate structure may include: a first aluminum layer; a first glass composite layer adjacent to the first aluminum layer; a first carbon composite layer adjacent to the first glass composite layer, and opposite to the first aluminum layer; and/or a second glass composite layer adjacent to the first carbon composite layer, and opposite to the first glass composite layer. The first glass composite layer may include one or more glass-fiber-reinforced thermoplastic prepreg plies. The first carbon composite layer may include one or more carbon-fiber-reinforced thermoplastic prepreg plies.