Composite material structural piece and manufacturing method thereof

Abstract

The invention provides a composite material structural piece which comprises a plurality of core bodies and flexible fiber reinforcing materials, wherein the plurality of core bodies are distributed in a grid-shaped manner; the surfaces of the core bodies are wrapped with the flexible fiber reinforcing materials; the flexible fiber reinforcing materials on the surfaces of adjacent core bodies are connected. The invention further provides a manufacturing method of the composite material structural piece. Experimental result shows that the fracture load of the composite material structural piece which is made from PVC (Polyvinyl Chloride) foam as the core bodies, double-axis fiber cloth as the flexible fiber reinforcing materials and unsaturated polyester and curing agent M50 as gluing resins can be greater than 2.500N, the bending elasticity modulus can be greater than 4,000MPa, and the bending strength can be greater than 45MPa.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a composite material structural part and a preparation method thereof. Background technique [0002] At present, bridges are mostly reinforced concrete bridges or steel structure bridges. As long-span highway bridges and railway bridges, reinforced concrete bridges and steel structure bridges can bear large loads and provide large spans, which have undeniable advantages. However, they also have their own insurmountable defects: the self-weight load of reinforced concrete bridges is large, which increases the self-weight of the bridge and reduces the bearing capacity that the bridge can provide; steel structure bridges are mostly composed of welding, which is prone to local instability and collapse under impact loads. The problem of local collapse; and these two kinds of bridges are prone to local fractures and weld cracks under fatigue loads, thereby redu...

AI Technical Summary

Problems solved by technology

However, they also have their own insurmountable defects: the self-weight load of reinforced concrete bridges is large, which increases the self-weight of the bridge and reduces the bearing capacity that the bridge can provide; steel structure bridges are mostly composed of welding, which is prone to local instability and collapse under impact loads. The problem of local collapse; and these two kinds of bridges are prone to local fractures and weld cracks under fatigue loads, thereby reducing the bearing capacity, stiffness and service life of the bridge structure; at the same time, the reinforced concrete material and Corrosion and deterioration of steel materials will become more and more obvious, resulting in difficulties in bridge maintenance and protection, which not only affects the normal use of bridge structures, but also creates safety hazards to a large extent

The current application of fiber-reinforced composite materials in the domestic bridge field is mainly concentrated in the two fields of pultruded assembled footbridge and pultruded assembled bridge deck. Construction technology, although this structure has the advantages of light weight and corrosion resistance, there are still the following problems: first, its bearing capacity cannot be compared with traditional materials, such as reinforced concrete or steel structures; second, the local impact resistance of this structure Very small, prone to deformation and damage of small parts

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