阅读说明：本技术 纤维增强塑料基材的复合材料防脆断的技术方案 (Technical scheme for preventing composite material of fiber reinforced plastic base material from brittle failure ) 是由 骆恩浩 刘毅 于 2019-09-06 设计创作，主要内容包括：本发明公开了一种以纤维增强塑料为基材的复合材料防脆断的技术方案,是在纤维增强材料中按比例加入高延伸性的氨纶纤维丝束,经后续加工成的复合材料在撞击时不容易脆断,采用氨纶纤维丝束加入到纤维增强丝层中的技术方案,具有加工容易,能适应不同厚薄规格的丝层,材料成本低等优点。(The invention discloses a composite material brittle fracture prevention technical scheme with fiber reinforced plastics as a base material, which is characterized in that spandex fiber tows with high extensibility are added into the fiber reinforced plastics in proportion, the composite material after subsequent processing is not easy to brittle fracture during impact, and the technical scheme that the spandex fiber tows are added into a fiber reinforced silk layer is adopted, so that the composite material brittle fracture prevention technical scheme has the advantages of easiness in processing, adaptability to silk layers with different thickness specifications, low material cost and the like.)

1. The technical scheme of the composite material of the fiber reinforced plastic base material for preventing brittle failure is characterized in that spandex fibers including spandex fiber tows and single yarns are added into the fiber reinforced material in proportion.

2. The composite material brittle fracture prevention technical scheme of the fiber reinforced plastic substrate as claimed in claim 1, characterized in that the fiber reinforced material is fiber woven fabric, non-woven fabric, uniaxial fabric, unidirectional sheet, unidirectional tow.

3. The technical scheme for preventing the brittle failure of the composite material of the fiber reinforced plastic base material as claimed in claim 1, wherein the fiber reinforced material comprises polyurethane fiber multidirectional cloth, unidirectional sheet, unidirectional tow and felt laid in the laying layer.

4. The technical scheme for preventing the brittle failure of the composite material of the fiber reinforced plastic base material as claimed in claim 1, wherein the spandex fiber can be replaced by other fiber yarns or threads with better extensibility, including mixed yarns or threads of the spandex fiber and other fibers.

Technical Field

The invention relates to a processing technical scheme of a composite material, in particular to a technical scheme of preventing brittle failure of a composite material which takes fiber reinforcement and plastic as a base material.

Background

In the prior composite material taking fiber reinforcement and plastic as a base material, the reinforcing fiber, such as carbon fiber, glass fiber and the like, is brittle, so that the composite material is manufactured into manned equipment, and the instantaneous brittle fracture generated during the collision aggravates the injury of passengers. In order to solve the brittle failure problem and increase the extensibility, for example, chinese patent application No. CN2018106875414 discloses a multifunctional filament cloth, which is prepared by placing spiral filaments in a filament layer in proportion, wherein a single filament or a filament bundle is spirally wrapped along the axial direction of a core material to form a wrapping layer, and an elastic rubber strip is placed in a unidirectional filament layer in proportion, which has a defect. The spiral thread has high processing and manufacturing technical requirements, high cost, thick diameter, thick rubber strip diameter, poor tensile strength and poor processability.

Disclosure of Invention

In order to overcome the defects of difficult processing of spiral lines, thicker diameter of rubber strips and poor tensile strength in the prior art, the invention provides a spandex fiber filament bundle, which comprises spandex fiber single filaments, wherein the spandex fiber single filaments are added into single filament layers of reinforcing fibers in all directions, including partial single axial filament layers, and spandex fiber cloth, sheets and felts are paved in reinforcing fiber laying layers.

The technical scheme adopted by the invention for solving the technical problems is as follows: the technical scheme of the composite material of the fiber reinforced plastic base material for preventing brittle failure is characterized in that spandex fibers including spandex fiber tows and single yarns are added into the fiber reinforced material in proportion.

The fiber reinforced material is fiber woven fabric, non-woven fabric, uniaxial fabric, unidirectional sheet and unidirectional tow.

The fiber reinforced material comprises polyurethane fiber multidirectional cloth, unidirectional sheets, unidirectional tows and felts which are paved in the paving layer.

The technical scheme for preventing the brittle failure of the composite material of the fiber reinforced plastic base material is characterized in that the spandex fiber can be replaced by other fiber yarns and threads with better extensibility, including mixed yarns and threads of the spandex fiber and other fibers.

The invention has the beneficial effects that the high extensibility of the spandex fiber is utilized to achieve the effect of preventing the composite material from brittle failure, the spandex fiber has medium thermal stability, the softening temperature is above 200 ℃, the dyeing and finishing are easy, the spandex fiber is suitable for being added into various thick and thin fiber reinforced material fiber layers, the composite material is seawater-resistant, the diameter of a single fiber can be processed into thick and thin fibers, the diameter of a tow can be processed into thick and thin fibers, the processing is easy, the processing cost is low, and the material cost is low.

Detailed Description

Example 1 spandex fiber filament bundles are added into each axial filament layer or part of the axial filament layers of the multiaxial carbon fiber non-woven fabric at certain intervals, and the number D of the filament bundles or single filaments is selected according to the thickness of the added axial filament layer by adopting the filament bundles or single filaments with different specifications D, and then the filament bundles or the single filaments are processed into non-woven dry cloth or non-woven prepreg cloth, wherein the dry cloth is required to be coated with resin and then cured into a composite material, such as prepreg cloth, and the composite material is cured after the lamination.

Example 2 interwoven cloth, woven cloth, uniaxial cloth, unidirectional sheet, in which spandex fiber filament bundles or single filaments are added to a filament layer according to a certain arrangement ratio in unidirectional filament bundles, and then resin or prepreg resin is coated and cured into a composite material.

In the above-mentioned various yarn layers, one or more layers of spandex fiber cloth, felt, and net are laid in the layer without adding spandex fiber yarn. And then spreading resin or pre-dipping resin, and then paving and curing to form the composite material.

Embodiment 4, the requirement on the brittle failure prevention degree of the composite material is not high, the production cost is economical, and the highly extensible spandex fiber can be replaced by other fiber materials with better extensibility, such as nylon fiber yarns and yarns, including spandex fiber and other fiber mixed yarns and yarns.