The invention relates in general terms to a device for production of a packaging precursor, wherein the packaging precursor consists to an extent of at least 80% by weight, based on the packaging precursor (1000), of a sheetlike composite, wherein the sheetlike composite includes: i. a composite plastic layer, ii. a composite carrier layer, iii. a first composite edge region, iv. a second composite edge region, wherein the device includes, as device constituents in a flow direction: a) a flat transport unit designed to transport the flat sheetlike composite, wherein the transport unit includes a transport surface designed to bear the composite; downstream of that b) a first heating unit designed to heat the first composite edge region, where the first heating unit includes energy release segments; downstream of that c) a contacting unit designed to bond the first composite edge region to the second composite edge region;
wherein the first heating unit is designed to release energy in the flow direction. The invention further relates to a method, to a packaging precursor obtainable by the method, to a packaging precursor and to a use of the device.

A fiber composite component assembly (100) includes a fiber composite component (3) including a base material and a fiber material, and a tolerance compensation layer (5) for joining the fiber composite component (3) to a further component (1), the tolerance compensation layer (5) including a fiber composite portion (17) and/or a further layer portion (7). A fiber composite component system (200) including a fiber composite component assembly (100) and a further component (1) joined to the fiber composite component assembly (100), as well as a method for producing a fiber composite component system (200), is also provided.

A method for surface preparation of composite substrates prior to adhesive bonding. A curable surface treatment layer is applied onto a curable, resin-based composite substrate, followed by co-curing. After co-curing, the composite substrate is fully cured but the surface treatment layer remains partially cured. The surface treatment layer may be a resin film or a removal peel ply composed of resin-impregnated fabric. After surface preparation, the composite substrate is provided with a chemically-active, bondable surface that can be adhesively bonded to another composite substrate to form a covalently-bonded structure.

A metallic end fitting for a given tubular component made of fibre reinforced polymer matrix composite material includes first and second concentric surfaces extending longitudinally along a central axis to form a socket for receiving an end of the tubular component. The socket has an outer diameter defined by the first surface, and an inner diameter defined by the second surface, wherein the outer diameter and inner diameter are chosen to provide an interference fit with respective outer and inner of the given tubular component when the component is press fitted into the socket. Each of the first and second concentric surfaces comprises one or more longitudinal cutting teeth. When the given tubular component is press fitted into the socket, the one or more longitudinal cutting teeth are designed to cut one or more longitudinal grooves into respective outer and inner surfaces of the composite material tubular component.

A method is described for opening a heat bonded sterile connection that includes a skin of material blocking flow between the connection site. The method includes applying external pressure to the connection site.

A method for preparing a pre-bond surface of a composite structure includes the steps of: (1) separating a peel ply, co-cured with a composite substrate, from the composite substrate; and (2) transferring an identifiable marking agent from the peel ply to the composite substrate upon separation of the peel ply from the composite substrate. Residue of the peel ply, transferred from the peel ply to the composite substrate upon separation of the peel ply from the composite substrate, is layered on the identifiable marking agent.

A method of manufacturing a rotor blade component for a rotor blade of a wind energy installation, a rotor blade component, and a wind energy installation comprising such a rotor blade component. The method includes manufacturing a layer system including a first layer of a first material and a second layer of a second material. The second material has a smaller modulus of elasticity than the first material, and the second layer extends at least partially along the first layer. The layer system is beveled at least at one end with the aid of at least one separation process such that the second layer projects beyond the first layer at the at least one end of the layer system. The layer system is connected to at least one other such layer system so as to form the rotor blade component.

An open-channel stiffener for stiffening a panel has a bonding flange for bonding the stiffener to the panel through a bondline formed between the bonding flange and the panel to form a stiffened panel. The open-channel stiffener has a cross-sectional shape that aligns, or substantially aligns, a shear center of the stiffener with a centroid of the stiffener and aligns the shear center proximate an edge of the bondline, and removes the need for a radius filler noodle. A plurality of perforations may be formed through the bonding flange to permit an adhesive to wick into the perforations and create a mechanical interlock between the bonding flange and the panel.

The present invention relates to nanoprocessing and heterostructuring of silk. It has been shown that few-cycle femtosecond pulses are ideal for controlled nanoprocessing and heterostructuring of silk in air. Two qualitatively different responses, ablation and bulging, were observed for high and low laser fluence, respectively. Using this approach, new classes of silk-based functional topological microstructures and heterostructures which can be optically propelled in air as well as on fluids remotely with good control have been fabricated.

Systems and methods are provided for blade-and-slot panel affixation. One embodiment is a method. The method includes cutting a first slot into a first composite panel that includes a core between two facesheets. The first slot penetrates through the core of the first composite panel. The method also includes cutting a second slot into a second composite panel that includes a core between two facesheets. The second slot penetrates through a facesheet of the second composite panel as well as the core of the second composite panel. The method further includes inserting a blade into the first slot, and inserting the blade into the second slot.