A method for manufacturing a structural element of a wind turbine blade including forming of at least one injection hole in at least one laminate provided on a top side of a core material of a first portion and a second portion of the structural element and a bottom side of a core material of the first portion and the second portion, so that the at least one injection hole is fluidically connected to the cavity. Further, injecting adhesive through the injection hole into the cavity, curing the adhesive injected into the cavity and thereby forming a joint between an end of the core material of the first portion and an end of the core material of the second portion. Further, a method for manufacturing a wind turbine blade and the structural element, the wind turbine blade is also provided.

A piston for a heavy duty diesel engine including a composite layer forming at least a portion of a combustion surface is provided. The composite layer has a thickness greater than 500 microns and includes a mixture of components typically used to form brake pads, such as a thermoset resin, an insulating component, strengthening fibers, and an impact toughening additive. According to one example, the thermoset resin is a phenolic resin, the insulating component is a ceramic, the strengthening fibers are graphite, and the impact toughening additive is an aramid pulp of fibrillated chopped synthetic fibers. The composite layer also has a thermal conductivity of 0.8 to 5 W/m.Math.K. The body portion of the piston can include an undercut scroll thread to improve mechanical locking of the composite layer. The piston can also include a ceramic insert between the body portion and the composite layer.

A printed sheet fiber entanglement apparatus entangles fibers from neighboring printed fibrous layers (e.g., sheets) with one another. As a stack of printed fibrous sheets is built up, periodically a holey plate is loaded against the top sheet of the stack. The guide plate may move the sheet down over the registration pins, and then an array of felting needles are thrust into the stack. An array of needles with upward and/or downward facing barbs is thrust thought holes in the guide plate into the stack through printed sheets closest to the guide plate. As the needles pushed into or are withdrawn from the stack, barbs on the felting needles intertwine fibers from the fibrous sheets through printed marking material and with neighboring sheets. The needle array may translate slightly between multiple thrusts so that a subsequent needling thrust may occur in a slightly new location.

A joint member is formed of a composite including reinforcement fibers and resin. The joint member is configured to be joined with another joint member to form a joint structure capable of enduring a tensile load in a load direction in which the joint member and the other joint member are separated from each other at a joined portion of the joint structure in a longitudinal direction of the joint member. The joint member includes a main body part and a joint part connected with the main body part at an end part of the main body part in the longitudinal direction of the joint member. The joint part has an orientation pattern having anisotropy such that fiber directions of the reinforcement fibers included in the joint part include a fiber direction different from the longitudinal direction of the joint member.

A joint member is formed of a composite including reinforcement fibers and resin. The joint member is configured to be joined with another joint member to form a joint structure capable of enduring a tensile load in a load direction in which the joint member and the other joint member are separated from each other at a joined portion of the joint structure in a longitudinal direction of the joint member. The joint member includes a main body part and a joint part connected with the main body part at an end part of the main body part in the longitudinal direction of the joint member. The joint part has an orientation pattern having anisotropy such that fiber directions of the reinforcement fibers included in the joint part include a fiber direction different from the longitudinal direction of the joint member.

A fiber preform for use in an overmolding process is provide that includes a fiber bundle arranged in a predetermined pattern and attached to itself with thread stitches to form at least one preform layer. At least one intumescent material is associated with the at least one preform layer. A vehicle component having fire resistant characteristics is also provided that includes a housing having a first side and a second side. The housing has a shape that defines the vehicle component. An intumescent material is provided on at least one of the first side and the second side of the housing.

A personal protective vest assembly is described herein. The personal protective vest assembly includes a personal protective vest and a body armor panel positioned within the personal protective vest. The body armor panel includes a ballistic material panel assembly that includes a plurality of layered material segments defined between a strike face and a wear face. Each of the layered material segments includes a different ballistic material.

A method for welding at least two parts including a thermoplastic material and having respective surfaces to be welded, including: inserting an insert between the surfaces to be welded of the two parts; generating heat via the insert; wherein the insert moves in relation to the parts to be welded in a welding direction. Also, an installation adapted for implementation of this method.

A method for welding at least two parts including a thermoplastic material and having respective surfaces to be welded, including: inserting an insert between the surfaces to be welded of the two parts; generating heat via the insert; wherein the insert moves in relation to the parts to be welded in a welding direction. Also, an installation adapted for implementation of this method.

A thermoplastic product includes a fabric-based reinforcing sheet and a polymerized thermoplastic material. The fabric-based reinforcing sheet is wound about a mandrel to form a plurality of layers having a cross-sectional shape that corresponds to the mandrel. The fabric-based reinforcing sheet includes a plurality of fiber bundles, which may have a bidirectional orientation or configuration. A polymerized thermoplastic material is disposed within each layer of the fabric-based reinforcing sheet. The polymerized thermoplastic material bonds each layer of the fabric-based reinforcing sheet to an adjacent layer.