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A method for forming a cylindrical structure with high crashworthiness of composite materials

A composite material and molding method technology, applied in the field of composite material design and production, can solve the limitations of composite materials and other problems, and achieve the effects of high crashworthiness, strong designability, stable structure and corrosion resistance

Active Publication Date: 2019-04-16
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for forming a cylindrical structure with high crashworthiness of composite materials, so as to solve the limitation problem of using composite materials

Method used

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  • A method for forming a cylindrical structure with high crashworthiness of composite materials
  • A method for forming a cylindrical structure with high crashworthiness of composite materials
  • A method for forming a cylindrical structure with high crashworthiness of composite materials

Examples

Experimental program
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Effect test

Embodiment 1

[0040] This example uses a thermoset carbon fiber prepreg tape material.

[0041] The specific steps are:

[0042] 1) Set the height of the structure to be formed, and use a slitting machine to cut the large composite material raw material into rectangular strips of a certain width, and ensure that the width is greater than the set height of the structure. In order to ensure that the ratio of the thickness after winding to the height of the structure is greater than or equal to 0.015, the cutting length should be greater than π×d×0.015×L, where d is the inner diameter of the formed cylinder, and L is the height of the formed cylinder.

[0043] 2) Cut the slit composite material cloth into two halves along the midline, see image 3 and Figure 4 , using a round hob or a dotted line cutter, make multiple parallel cuts along the oblique line, the cutting form is as figure 1 and figure 2 As shown, ensure that the spacing between each successive cutting line is consistent.

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Abstract

The invention discloses a forming method of a composite cylinder structure having high crashworthiness. The forming method of the composite cylinder structure having the high crashworthiness is characterized in that fiber cloth or fiber prepreg is cut according to the specific rule and then is coiled into a cylinder, finally the cylinder is treated by a curing technology and the composite cylinder structure having the high crashworthiness is formed. Compared with a traditional crashworthiness structure, the composite cylinder structure designed in such way is lighter and has a higher energy absorption effect, destruction can be carried out in a very stable progressive crushing manner in a destruction process, and the composite cylinder structure has higher specific energy absorption ability.

Description

technical field [0001] The invention belongs to the field of design and manufacture of composite materials, in particular to a method for forming a cylindrical structure with high crashworthiness of composite materials. Background technique [0002] Structural crashworthiness research is to improve the collision resistance of the transportation system by sacrificing specific structures and absorbing collision energy, so as to protect the safety of passengers and cargo. In order to achieve the purpose of ensuring living space and reducing overload and impact force, an important way is to use light, high-strength, high-specific energy-absorbing materials and structures as energy dissipation devices. In order to make the collision dissipate in a controllable and predictable manner, the crashworthy structure should ensure that the failure mode should be stable, repeatable and reliable, that is, it can be dissipated in a relatively fixed damage form in random collision events Co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C70/48B29C70/44B29C70/54
CPCB29C70/443B29C70/48B29C70/545
Inventor 段玉岗辛志博
Owner XI AN JIAOTONG UNIV