CN204361276U

CN204361276U - A kind of waveform flexible honeycomb

Info

Publication number: CN204361276U
Application number: CN201420813388.2U
Authority: CN
Inventors: 周春苹; 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: 2015-05-27
Anticipated expiration: 2024-12-19

Abstract

The utility model belongs to technical field of composite materials, be specifically related to a kind of waveform flexible honeycomb, described honeycomb is staggered by several waveform cellular units and forms, the edge of described waveform cellular unit is made up of two semi arches and four 90 ° of circular arcs, the utility model breaches conventional hexagonal cell when compared with restriction on-deformable when deep camber, there is sufficient in-plane deformation ability and crooked deformability, during distortion, stress distribution is even, in vertical plane direction, there is certain bearing capacity simultaneously, therefore solve deep camber structure carry outside in-plane deformation and face between contradiction.

Description

A kind of waveform flexible honeycomb

Technical field

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

Background technology

In radome, a lot of structure is usually had to there is larger curvature, conventional hexagonal shape honeycomb sandwich construction is still adopted in this deep camber situation, be difficult to resist the requirement of high-mechanic outside large deformation and face in the face in making and using, easily there is saddle effect, thus make honeycomb in curing molding process, produce very large prestressing force and because being out of shape the excessive structure initial damage brought.

Utility model content

Technical problem to be solved in the utility model is: increase the flexibility of honeycomb, avoids honeycomb sandwich construction when compared with occurring saddle effect and structure initial damage when deep camber.

The technical solution of the utility model is: a kind of waveform flexible honeycomb, described honeycomb is staggered by several waveform cellular units and forms, the edge of described waveform cellular unit is made up of two semi arches and four 90 ° of circular arcs, with the center of described waveform cellular unit for coordinate 0 point, with (0,-3) be the center of circle, with 1 for radius draws semi arch through (0 ,-2); With (-1,0) for the center of circle, be that radius draws 90 ° of circular arcs through (-1 ,-3) and (-4,0) with 3; With (-4,3) for the center of circle, with 3 for radius draws 90 ° of circular arcs through (-4,0) (-1,3); With (0,3) for the center of circle, with 1 for radius draws semi arch through (0,4); With (4,3) for the center of circle, with 3 for radius draws 90 ° of circular arcs through (1,3) (4,0); With (1,0) for the center of circle, with 3 for radius draws 90 ° of circular arcs through (4,0) (1 ,-3).

The beneficial effects of the utility model are: breach conventional hexagonal cell when compared with restriction on-deformable when deep camber, there is sufficient in-plane deformation ability and crooked deformability, during distortion, stress distribution is even, simultaneously in vertical plane direction, there is certain bearing capacity, therefore solve deep camber structure carry outside in-plane deformation and face between contradiction.

Accompanying drawing explanation

Fig. 1 is waveform flexible cellular unit;

Fig. 2 waveform flexible cellular board schematic diagram.

Embodiment

Below in conjunction with drawings and Examples, the utility model is described in further detail.

The waveform flexible honeycomb of the utility model indication is waveform element, and unit is made up of aramid fiber honeycomb paper laying, and unit form as shown in Figure 1.

The cellular board be made up of waveform flexible cellular unit gluing Post RDBMS as shown in Figure 2.Cellular board is formed by some groups of tangent cellular unit orthogonal arrangement.

The waveform 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 waveform flexible honeycomb of the utility model ratio of the distortion in unit length (pulling force on unit cross-sectional area with) is 39% of normal hexagonal honeycomb, and in the equivalent face of conventional hexagon honeycomb and waveform flexible honeycomb, stretch modulus is respectively 1.53Nmm ², 0.59Nmm ², waveform flexible honeycomb is easier than normal hexagonal honeycomb as can be seen here produces distortion in face.

Second, under equal size moment of flexure (100N ﹒ mm) effect, the total deformation of normal hexagonal honeycomb and waveform flexible honeycomb is respectively 6.46mm and 109.5mm, the saddle effect relative deformation ratio of cellular board total deformation (the maximum saddle distortion absolute value with) is respectively 0.315 and 0.019, and waveform flexible honeycomb more not easily produces saddle effect than normal hexagonal honeycomb as can be seen here.

3rd, by regulating the size of waveform flexible cellular unit each several part, can realize the different requirements of honeycomb in-plane deformation ability and bearing capacity outside face, flexibility is controlled.

Claims

1. a waveform flexible honeycomb, it is characterized in that, described honeycomb is staggered by several waveform cellular units and forms, the edge of described waveform cellular unit is made up of two semi arches and four 90 ° of circular arcs, with the center of described waveform cellular unit for coordinate 0 point, with (0 ,-3) for the center of circle, with 1 for radius draws semi arch through (0 ,-2); With (-1,0) for the center of circle, be that radius draws 90 ° of circular arcs through (-1 ,-3) and (-4,0) with 3; With (-4,3) for the center of circle, with 3 for radius draws 90 ° of circular arcs through (-4,0) (-1,3); With (0,3) for the center of circle, with 1 for radius draws semi arch through (0,4); With (4,3) for the center of circle, with 3 for radius draws 90 ° of circular arcs through (1,3) (4,0); With (1,0) for the center of circle, with 3 for radius draws 90 ° of circular arcs through (4,0) (1 ,-3).