A kind of gradient honeycomb composite body and its manufacturing method and application structure

A technology of application structure and manufacturing method, applied in the sub-structure, super-structure, super-structure sub-assembly and other directions, can solve the problems of poor energy absorption function, disadvantage of lightweight structure, etc., and achieve low cost, high material utilization rate, and easy batch production. production effect

Inactive Publication Date: 2017-05-10
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the technical problem that the poor energy absorption function of the traditional honeycomb composite is not conducive to the lightweight structure, the present invention provides a gradient honeycomb composite and its manufacturing method and application structure. The present invention can improve the energy absorption capacity of the structure and can Lighten the body structure

Method used

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  • A kind of gradient honeycomb composite body and its manufacturing method and application structure
  • A kind of gradient honeycomb composite body and its manufacturing method and application structure
  • A kind of gradient honeycomb composite body and its manufacturing method and application structure

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Effect test

Embodiment 1

[0063] The invention provides a gradient honeycomb composite body, which is a vertical gradient honeycomb composite body, and its structure is as follows: figure 1 As shown in Figure 3, it includes: a plurality of cell units.

[0064] The cross section of the unit cell can be a hollow polygon or a hollow circle. After the gradient honeycomb composite is cut along the plane where the X-axis and Y-axis are located, the thickness of multiple cells in the same section is the same; along the direction of the Z-axis, the thickness of each cell is changed, such as figure 2 As shown, they are thin area, thick area and variable thickness area respectively, and the corresponding lengths are l min , l max And h, the thin area and the thick area are equal thickness areas, and the thickness of a certain point x in the thickening area is calculated according to the following power exponent function:

[0065]

[0066] Among them, t a is the thickness value corresponding to the thin a...

Embodiment 2

[0076] The invention provides a gradient honeycomb composite body, which is a horizontal gradient honeycomb composite body, and its structure is as follows: Figure 5 As shown, it includes: a plurality of cell monomers, and the cross section of the cell monomers can be a hollow polygon or a hollow circle. After intercepting the gradient honeycomb composite body along the plane where the X-axis and Z-axis are located, the gradient honeycomb composite body is divided into multiple thickness regions in the in-plane direction, and the number of cell monomers contained in each thickness region is the same; and Along the Y direction, the wall thickness of the cell monomers in the same thickness area is the same.

[0077] The thickness of the different thickness regions increases according to the gradient function:

[0078]

[0079] where 11 is the thickness of the minimum thickness region, t n is the thickness of the maximum thickness region; i is the i-th thickness region, n i...

Embodiment 3

[0088] The present invention also provides an applied structure of a gradient honeycomb composite body, the structure of which is as follows: Figure 7 As shown, it includes a gradient honeycomb composite body 62 and a pipe 61 wrapping it. Therefore, it is also called gradient honeycomb filled thin-walled tube structure. The gradient honeycomb composite body 62 is a longitudinally gradient honeycomb composite body, and may also be a transversely gradient honeycomb composite body; the pipes therein are made of high-strength fiber-reinforced composite materials.

[0089] The manufacturing process of the above application structure is as follows:

[0090] Step 31, select the gradient honeycomb composite body with the required gradient value according to the design requirements, and process the selected gradient honeycomb composite body into the required shape by wire cutting method;

[0091] Step 32, laying the preformed plate of high-strength fiber-reinforced composite materia...

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Abstract

The invention provides a gradient honeycomb complex. The gradient honeycomb complex comprises a plurality of cell monomers with a hollow structure; after the gradient honeycomb complex is intercepted along the plane of X axis and Y axis, the thicknesses of the plurality of cell monomers in a same cross section are same; and the thickness of each of the cell monomers changes along a Z-axial direction, and the thickness of a point x in a thickening area is calculated according to a gradient value. The honeycomb thickness change mode can be easily optimized by selecting an optimum gradient parameter. When impact load in the gradient direction is applied to a gradient honey filled composite material thin wall structure, the gradient honeycomb complex can absorb more energy than traditional honeycomb complexes, and the utilization rate of the material is higher than that of the traditional honeycomb complexes; and in the bumping process, the impact force is stationary, and the gradient honeycomb complex has good crash resistance. A novel vehicle body structure is composed of the gradient honeycomb and the composite material thin wall structure, so the vehicle body structure is greatly reduced, and the crash resistance of the structure and the safety performance of a whole vehicle are improved.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to a gradient honeycomb composite body, a manufacturing method and an application structure thereof. Background technique [0002] With the development of new energy vehicles, safety and lightweight have become the key technologies for the development of new energy vehicles. Fiber-reinforced composite materials are favored in the lightweight of electric vehicle bodies due to their high specific strength and specific stiffness. In recent years, composite materials have gradually transitioned from automotive decorative parts to secondary load-bearing parts and main load-bearing parts. However, when the thin-walled body structure using these composite materials is subjected to impact loads, it is prone to unstable deformation modes and cannot be well to absorb energy. Therefore, how to design composite body structural parts with better crashworthiness has become a research hotspot in the st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B3/12B32B3/28B32B15/04B32B15/20B32B7/12B32B37/12B23P15/00B62D21/02B62D25/10B62D25/20
CPCB23P15/00B32B3/12B32B3/28B32B7/12B32B15/04B32B15/20B32B37/12B32B2307/558B32B2307/56B32B2307/718B32B2605/08B62D21/02B62D25/10B62D25/20
Inventor 孙光永朱国华李光耀
Owner HUNAN UNIV
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