摘要:
Method to make an arm in a composite material for articulated or telescopic modular structures for the distribution of concrete, which comprises a first step in which one or more layers of fiber (16, 25) are distributed on the external surface (17) of a male-type mold (11) having a cross section defined by at least a substantially flat wall. The section of the male mold (11) reduces, in at least one of its sizes, passing from one of its ends to the other. The fibers (16) may or may not be pre-impregnated with a resinous matrix. The method also comprises a second step in which the male mold (11) is ejected from the product thus obtained, a possible heat treatment being provided, for example in autoclave, before the extraction of the product.
摘要:
The present invention relates to a vessel for a compressed gaseous fuel. The vessel has a non-cylindrical shape and is provided with a bulk head within the vessel. The vessel is surrounded by a composite comprising a fibre reinforcement that is wound around the vessel. The vessel comprises a liner with a shape that is substantially the same as the desired vessel shape. The liner is provided with at least one recess that extends around the liner and divides the liner in sections connected to each other by a passage. The fibre reinforcement is continuously wound around the liner in different directions to ensure sufficient vessel strength and the recess is filled with fibres so that the fibres in the recess constitute the bulk head. The invention further relates to a method for producing the claimed vessel.
摘要:
A mobile platform personnel berth unit and a method for creating the mobile platform personnel berth unit are provided. A male mandrel is created defining an inner mold line surface of the berth unit. The male mandrel is overlayed with one or more layers of filament strips. The filament layers are thermally cured to create an integrated structural member. The male mandrel is then removed from the structural member. The structural member is profile shaped to create a semi-finished berth unit having a top, a bottom and a pair of integral side panels. Additional entrance and back panels as well as access panels and connecting hardware are then added to complete the berth unit.
摘要:
A method for manufacturing an internal structure of a coach body having a self-supporting outer structure includes winding an inner covering layer on a winding core, attaching channel segments to a ceiling wall and insulation segments to corner regions, attaching heating fabric sheets to a floor wall and to side walls, attaching metal rails extending longitudinally to the floor wall and the side walls, filling between the rails with insulating foam, winding an outer covering layer to form an internal structure. After the setting of the resin impregnated layers, the internal structure is removed from the winding core and cut open longitudinally at the floor wall. The internal structure is elastically deformed and inserted into an outer structure. The walls of the internal structure are moved by a tensioning device into engagement with the outer structure and the internal structure is provisionally attached to the outer structure with fasteners.
摘要:
The method of making a non-metallic bearing assembly by initially molding a flat longitudinally extending sheet of rubber containing a ply or plies of fiberglass reinforced fabric therein, then cutting such sheet into a plurality of strips. The flat strips are then located around the periphery of a mandrel that is then wound with fabric which is impregnated with epoxy resin, then cured and machined to a cylindrical bearing.
摘要:
A mobile platform personnel berth unit and a method for creating the mobile platform personnel berth unit are provided. A male mandrel is created defining an inner mold line surface of the berth unit. The male mandrel is overlayed with one or more layers of filament strips. The filament layers are thermally cured to create an integrated structural member. The male mandrel is then removed from the structural member. The structural member is profile shaped to create a semi-finished berth unit having a top, a bottom and a pair of integral side panels. Additional entrance and back panels as well as access panels and connecting hardware are then added to complete the berth unit.
摘要:
An axially extending tubular composite member having a plurality of plies and extending along a longitudinal axis has at least three plies with selectively structured fiber components in each ply. Typically an inner ply has at least one biaxial fiber component, an intermediate ply has at least an axial fiber component that typically is combined with two further fibers to form a triaxial fiber component. Another ply typically has a woven fiber component. A further ply having a biaxial component either replaces the ply of woven fiber or is disposed beneath it over the intermediate ply. A surface veil having fiber and an excess of resin material typically covers at least the innermost or outermost surface of the composite member. An internal web member can be provided, and typically also employs fibers and the matrix material.
摘要:
An axially extending composite tubular member having a plurality of plies and having primary bending stiffness along a longitudinal axis, has at least one interior ply having a matrix material and a first fiber component with fibers oriented at an angle relative to the longitudinal axis of between thirty degrees and sixty degrees, and more particularly between forty degrees and fifty degrees. An internal weblike reinforcement spans across the tubular interior of the member between and is secured to two spaced apart wall portions. The first fiber component provides significant torsional stiffness to the composite member and the internal weblike reinforcement provides significant impact resistance to the composite member. A method of fabricating such an axially extending composite tubular member includes the steps of forming first and second fabric strips into axially extending side-by-side closed tubes, the abutting walls of which form the internal weblike reinforcement, and forming a fibrous fabric into a longitudinally extending ply enclosing the first and second plies and having fibers that constitute the first fiber component of said interior ply.
摘要:
The manufacture of large scale wind turbine blades is accomplished by winding composite fiber materials onto a mandrel to form the desired airfoil shape. The winding process requires that the fibers always maintain contact with the mandrel surface. If the surface is concave the fibers will form a bridge over the concave surface portion which produces a void. This invention avoids bridging by analysis of the mandrel surface design including the steps of defining a plurality of coordinate points on the surface prior to winding thereof, and determining if a concavity will occur in the fiber winding plane passing through each coordinate point. If a concavity is located, the mandrel design coordinate point at the concavity is modified to eliminate the concavity and provide a continuous flat or convex surface in the fiber winding plane. The process can be automated by clerical or computing methods, and is repeated for each coordinate point until bridging is substantially eliminated.