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Method for forming spiral composite toughening fine rod

A composite material and molding method technology, which is applied in the field of composite material modification and interlayer toughening, can solve the problems of insignificant toughening effect, achieve the effect of improving interlayer toughening effect, high efficiency, and realizing automation

Inactive Publication Date: 2019-01-11
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the toughening effect is not significant when the thin rod is coated on the surface.

Method used

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  • Method for forming spiral composite toughening fine rod
  • Method for forming spiral composite toughening fine rod

Examples

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Embodiment

[0015] A method for forming a spiral composite material toughened thin rod with "Z" twist. In this embodiment, the raw material of the thin rod is carbon fiber and epoxy resin. The carbon fiber is three strands of T3001K fiber bundles 101 with "S" twist, and the twist is 2.5 twist / cm, combined figure 1 The specific molding steps are introduced as follows: firstly, three tubes of 1K twisted carbon fiber bundles 101, three resin infiltration tanks 102 and three small hole forming molds 103 are fixed on the rotating platform 104; secondly, the three tubes of carbon fiber bundles 101 are respectively passed through The resin tank 102 is impregnated with resin; the third, the three strands of fiber bundles impregnated with resin are preformed through respective small hole forming molds 103, and the small hole forming molds 103 have through-hole cavities 113 with equal cross-sections, such as figure 2 As shown, wherein, the diameter of equal cross-section through-hole cavity 113 is...

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Abstract

The invention relates to a method for forming a spiral composite toughening fine rod, belonging to the fields of modification of composites and interlaminar toughening technology. The method comprisesthe following steps: 1, infiltrating fiber bundles in the same direction of twist in resin separately; 2, then allowing the fiber bundles to pass through independent forming dies respectively, wherein the forming dies have circular-cross-section through-hole cavities, and the bore diameters of the cavities are such designed that the volume contents of the fiber bundles in the cavities are in a range of 25 to 70%; 3, subjecting all the fiber bundles having passed through the dies to spiral twisting so as to realize plying, wherein the direction of twist is opposite to the twist direction of asingle fiber bundle; and 4, heating the twisted spiral plied fiber bundles for curing so as to eventually obtain the spiral composite toughening fine rod. The method of the invention allows the surface of the fine rod to generate spiral grooves which allow embedding effect to be produced between the fine rod and a to-be-toughened laminate, so the interlaminar toughening effect of a product is substantially improved.

Description

technical field [0001] The invention relates to the modification and interlayer toughening technology of composite materials, in particular to a forming method of a spiral composite material toughened thin rod, which is mainly used to improve the interface between the composite material toughened thin rod and a laminated plate performance, thereby improving the interlaminar toughness of laminated composites. Background technique [0002] Traditional two-dimensional laminated composite materials have good in-plane mechanical properties, but there is no fiber reinforcement between the layers, and only the matrix resin plays the role of bonding and transmitting loads, so it is perpendicular to the direction of the layup and between the layups. performance is relatively weak. When subjected to external loads, the laminated composite material often produces interlaminar damage first, and the low interlaminar strength of the composite material also leads to poor damage resistance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/28B29C70/54
CPCB29C70/28B29C70/54
Inventor 王晓旭王怡扬
Owner TIANJIN POLYTECHNIC UNIV
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