Composite material with composite reinforcement structure and preparation method thereof
A technology of composite reinforcement and composite materials, which is applied in the field of composite materials with a composite reinforcement structure and its preparation, can solve the problems of material damage, affecting the continued use of materials, etc., and achieve the improvement of tensile strength and bending strength. Effect
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Embodiment 1
[0041] The preparation of embodiment 1 reinforcement
[0042] 1. Reinforcement structure design
[0043] Among the reinforcements of textile structural composite materials, woven materials are a kind of textile structure commonly used as reinforcements, which are mainly divided into three types: planar biaxial, planar multiaxial, and spatial three-dimensional structures. Woven fabrics can be arbitrarily designed to obtain good structural performance and stability, and are fabrics with a large coverage factor of warp and weft yarns in a plane.
[0044] In the present invention, the multilayer weave structure and the plain weave structure are respectively regarded as a structural unit, and the two weave structure units are compositely configured (the multilayer structure unit is four layers, and the plain weave structure unit is double-layered), and its configuration structure is as follows: figure 1 As shown in Fig. a, Fig. a is a 1+1 configuration structure, Fig. b is a 1+2 c...
Embodiment 2
[0062] Preparation of embodiment 2 composite material
[0063] The preparation of composite materials includes eight steps: preparation stage, encapsulation process, air extraction, resin preparation, glue injection, curing, demoulding, and post-processing.
[0064] 1. Prepare a glass plate with a size of 40cm×40cm×0.8cm, and spread a layer of isolation film of corresponding specifications on the glass plate. Before the experiment started, the glass plate was washed with distilled water and left to dry, and the film was guaranteed to be flat and wrinkle-free.
[0065] 2. Use the plastic film as the bottom plate, place the woven fabric in the center, and use AT-199 tape to position around the fabric. The specific position is that the tape is 1-2mm away from the left and right sides of the fabric, and 3-4mm up and down. When positioning, pay attention to the tightness of the tape connection point, stick more tape on the four top corners of the tape and the upper and lower sides...
Embodiment 3
[0074] The mechanical property test of embodiment 3 composite material
[0075] 1. Tensile properties
[0076] The samples were prepared according to the test standard of ASTM D3039 / D3039M-08 "Standard Test Method for Tensile Properties of Polymer Matrix Composite Materials", as shown in Table 1.
[0077] Table 1
[0078]
[0079] The tensile fracture stress is calculated by the formula, and the specific calculation formula is as follows:
[0080]
[0081] In the formula: σ—is the tensile breaking strength, MPa;
[0082] P——tensile breaking strength, N;
[0083] b—sample width, mm;
[0084] h—is the thickness of the sample, mm;
[0085] Table 2 shows the tensile performance test results of the composite materials. It can be seen that the tensile fracture strength required for the laminated composite with four layers of reinforcement is the largest, about 509.74MPa, and the tensile fracture strength required for the multilayer composite is the smallest, about 144.05MP...
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Abstract
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