6 results about "Volume content" patented technology

A kind of continuous fiber wet winding process technology method and device of post large tension, it is characterized in that, including the following procedures: fiber yarn route design, fiber spread yarn thinning control, impregnation auxiliary adjustment, winding resin preparation, fiber impregnation adjustment, impregnated fiber spread yarn extrusion glue adjustment, winding tension adjustment, winding line design, solidification and mechanical property test.The device of the application is simple, can be popularized and applied, and low wear winding under large winding tension can be realized.The present application effectively solves the process problem that traditional process cannot simultaneously realize fiber low damage impregnation and fiber large tension precision winding by designing special winding device and matching winding process, and provides an efficient process technology path for realizing high fiber volume content and high mechanical property fiber composite material preparation.

The application belongs to the technical field of sports equipment, and particularly relates to an anti-fatigue badminton racket rod based on three-dimensional woven composite material and a manufacturing method, which comprises a net frame, a racket rod and a handle connected in sequence, and the net frame, the racket rod and the handle are integrally formed into a continuous whole member by three-dimensional woven composite material; the three-dimensional woven composite material comprises a reinforcing body and a matrix, the reinforcing body is a carbon fiber three-dimensional woven preform, and the matrix is modified epoxy resin; the fiber volume content of the racket rod is 55%-65%, the application constructs a fiber space interlocking network through a four-way weaving structure, eliminates interlayer interfaces and splicing stress concentration in combination with an integrated forming process, and improves the anti-fatigue performance, anti-torsion stiffness and interlayer bonding strength of the racket rod; through optimization of the fiber volume content and a stepped curing process, the best balance of strength, formability and fatigue life is achieved, and the technical problems of easy delamination, poor anti-fatigue performance and low connection reliability of a traditional laminated material badminton racket rod are solved.

The application discloses a kind of directional reinforced puncture fabric and its forming method, comprising: step 1: according to the design of fabric directional reinforcement requirement, unit layer includes at least one fiber layer, and the unit layer formed by at least one fiber layer is distributed with fiber in multiple directions, and the volume content ratio of fiber distributed in multiple directions is not all same;Step 2: the fiber layer in the first layer unit layer is sequentially laid in the puncture device and puncture pressurization setting is carried out;Step 3: the fiber layer of remaining unit layer is sequentially carried out puncture pressurization setting according to step 2 until reaching predetermined height;Step 4: the position of puncture needle is replaced by Z direction fiber bundle one by one, and finally three-dimensional fabric is formed.The application utilizes the fiber type, fiber structure, organization structure and fiber layer combination design of fiber layer, realizes the limit promotion of fabric specified single or multiple direction fiber volume content or performance, forms directional reinforced puncture fabric to meet the requirement of material directional high performance.

The invention relates to a method for repairing a part (10) made of a ceramic matrix composite material, the part having a damaged zone, the method comprising: - a step of machining away at least the damaged zone so as to obtain a recessed repair zone (12); - a step of placing, in the recessed repair zone (12), a repair material (13) comprising at least one ply (15) of composite material preimpregnated with a ceramic matrix precursor; - a step of compacting the one or more plies (15) of composite material preimpregnated with the ceramic matrix precursor in order to increase a fiber volume content; and - a sintering step for consolidating a bond between the repair material (13) and the composite part (10).

The invention belongs to the technical field of terrace materials, and particularly relates to a self-healing seamless terrace material based on a microcapsule self-repairing technology and a preparation method and a construction method of the self-healing seamless terrace material. The invention discloses a self-healing seamless terrace material based on a microcapsule self-repairing technology. The self-healing seamless terrace material comprises a high-performance cement matrix and a ternary microcapsule self-repairing system, the high-performance cement matrix is prepared from cement, fly ash, silica fume, quartz sand, PVA fibers and a high-efficiency water reducing agent, and the ternary microcapsule self-repairing system comprises an A-type capsule, a B-type capsule and a C-type capsule; wherein the capsule core of the A-type capsule is an epoxy resin prepolymer, the capsule wall of the A-type capsule is urea resin, the particle size is 50-100 microns, and the volume mixing amount is 3-5%, the capsule core of the B-type capsule is an amine curing agent and a catalyst, the capsule wall of the B-type capsule is polyurethane or polyurea, the particle size is 30-80 microns, and the volume mixing amount is 2-4%. The capsule core of the C-type capsule is a nano calcium carbonate suspension, the capsule wall is gelatin or Arabic gum, the particle size is 20-50 microns, and the volume mixing amount is 1-2%. According to the self-healing seamless terrace material based on the microcapsule self-repairing technology as well as the preparation method and the construction method of the self-healing seamless terrace material, the functional microcapsules are pre-buried in the cement matrix, so that automatic detection and self-healing of microcracks are realized, the terrace is upgraded from anti-cracking to active crack healing, and the service life of the terrace is fundamentally prolonged.

This invention belongs to the technical fields of infrastructure construction, urban renewal, seismic reinforcement, and infrastructure improvement in cold regions, and discloses a low-fiber-content, high-toughness self-prestressed concrete. It achieves the dual goals of high toughness and crack-free service life in low-fiber-content concrete by controlling the volume deformation of a highly efficient expansion component. This invention controls the mass fraction (25 parts / 2000 parts - 45 parts / 2000 parts) and particle size (1 μm - 80 μm) of the highly efficient expansion component, and cures it with water for at least 3 days. The volume of the expanded highly efficient expansion component accounts for 2.5% - 4.5% of the total volume; thus, an equivalent flexural toughness of not less than 160 kJ / m is achieved with a low fiber volume content. 3 It achieves the goal of low cost and high toughness with a flexural strength of not less than 12 MPa. It has broad prospects in infrastructure construction, urban renewal, hydraulic structures, seismic reinforcement, and especially in upgrading infrastructure in cold regions.