CN204809401U

CN204809401U - Circular flexible honeycomb

Info

Publication number: CN204809401U
Application number: CN201420815170.0U
Authority: CN
Inventors: 曲秀晓; 李兴德
Original assignee: AVIC Research Institute Special Structures Aeronautical Composites
Current assignee: AVIC Research Institute Special Structures Aeronautical Composites
Priority date: 2014-12-19
Filing date: 2014-12-19
Publication date: 2015-11-25
Anticipated expiration: 2024-12-19

Abstract

The utility model belongs to the technical field of combined material, concretely relates to circular flexible honeycomb, the honeycomb is arranged by the tangent quadrature of the circular honeycomb unit of a plurality of and is constituteed, honeycomb unit including two kinds of shapes, the honeycomb unit is star types circular and four yuan of tangent constitutions respectively. The utility model discloses broken through conventional hexagon honeycomb non -deformable's under the circumstances of great camber restriction, utility model's honeycomb has deformability and crooked deformability in the sufficient face, distributing of stress is even during the deformation, has improved simultaneously at vertical plane orientation bearing capacity, has consequently solved the contradiction that honeycomb sandwich structure bore the weight of at face internal strain and off -plate.

Description

A kind of circular flexible honeycomb

Technical field

The utility model belongs to technical field of composite materials, is specifically related to a kind of circular flexible honeycomb.

Background technology

In radome, usually there is a lot of structure to there is larger curvature, in this deep camber situation, still adopt conventional hexagonal shape honeycomb sandwich construction, be difficult to resist the requirement of high-mechanic outside large deformation and face in the face in making and using, easily occur saddle effect.

Utility model content

Technical problem to be solved in the utility model is: the flexibility increasing honeycomb, avoids honeycomb sandwich construction to occur saddle effect when larger curvature.

The technical solution of the utility model is: a kind of circular flexible honeycomb, and described honeycomb is made up of the tangent orthogonal arrangement of several circular cellular units, comprises the cellular unit of two kinds of shapes, and described cellular unit is respectively circle and four and justifies the star-like of tangent compositions.

The beneficial effects of the utility model are: breach conventional hexagonal cell when compared with restriction on-deformable when deep camber, the honeycomb of institute's utility model has sufficient in-plane deformation ability and crooked deformability, during distortion, stress distribution is even, improve in vertical plane direction bearing capacity simultaneously, therefore solve the contradiction that honeycomb sandwich construction carries outside in-plane deformation and face.

Accompanying drawing explanation

Fig. 1 is circular flexible cellular unit schematic diagram;

Fig. 2 is phase cut unit group schematic diagram;

Fig. 3 is star-like cell schematics;

Fig. 4 is circular flexible cellular board schematic diagram.

Embodiment

Below in conjunction with accompanying drawing and case study on implementation, the utility model is described in further detail.

The circular flexible honeycomb of the utility model indication is the circular cell of diameter 6mm, and unit is made up of three layers of aramid fiber honeycomb paper laying impregnation, and unit form as shown in Figure 1.

The cellular board be made up of circular flexible cellular unit as shown in Figure 4.Cellular board is formed by some groups of tangent circular flexible cellular unit orthogonal arrangement, tangent circular flexible cellular unit forms several unit groups and sees Fig. 2, each phase cut unit group forms a star-like unit, 4 limits of star-like unit are 1/4 arc length of four tangent circular flexible honeycomb unit, length and width are circular flexible cellular unit diameter, and star-like unit is shown in Fig. 3.

The circular flexible honeycomb that the utility model provides is compared to existing hexagonal honeycomb structure, and its performance advantage is:

First, stretch modulus in the equivalent face of this circular flexible honeycomb of the utility model ratio of the distortion in unit length (pulling force on unit cross-sectional area with) is 41% of conventional hexagonal cell, under equal large side crops industry (100N ﹒ mm) effect, the total deformation of hexagon cellular structure and circular flexible honeycomb is respectively 6.46mm, 60.5mm, the saddle effect relative deformation ratio of cellular board total deformation (the maximum saddle distortion absolute value with) is respectively 0.315 and 0.075, and visible circular flexible honeycomb is more yielding than hexagon cellular.

The second, the bond area of the circular honeycomb of same specification is 1.3 times of hexagonal cell, improves circular honeycomb in vertical plane direction bearing capacity.

Claims

1. a circular flexible honeycomb, is characterized in that, described honeycomb is made up of the tangent orthogonal arrangement of several circular cellular units, comprises the cellular unit of two kinds of shapes, and described cellular unit is respectively circle and four and justifies the star-like of tangent compositions.