JP2011110842A - Honeycomb-like structure and assembly of the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a honeycomb-like structure that can efficiently absorb energy with respect to even a deflecting load. <P>SOLUTION: The honeycomb-like structure 1 includes reinforcing walls 4 formed by joining the projections of main cell walls 3 of uneven shape to each other and provided on the mutual side faces of the joined projections. Consequently, even when the deflection load, particularly, a load having a component in a shearing direction (a direction parallel with the mutual joint faces of the projections) is inputted, the separation of the mutual joint faces of the projections is suppressed to hold the honeycomb structure. Energy is thereby absorbed efficiently with respect to even the deflecting load. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a honeycomb-like structure and an assembly thereof.

  Conventionally, a honeycomb-like structure made of fiber reinforced resin (FRP) is known as a structure used for an aircraft or the like. This honeycomb-like structure is formed using a prepreg that is a material obtained by impregnating a reinforcing fiber such as carbon fiber or glass fiber with a thermosetting resin. For example, by joining the convex portions of the prepreg having a concavo-convex shape, the hollow columnar cells are arranged in a honeycomb shape (honeycomb shape), and a honeycomb-like structure is formed.

  As such a honeycomb-like structure, there is a honeycomb core described in Patent Document 1. This honeycomb core has a cell cross-sectional shape of a polygon such as a quadrangle or a hexagon, and has a structure capable of absorbing impact energy when an impact load is input in the cell axis direction.

JP 2001-009942 A

  However, in the honeycomb core described in Patent Document 1, although the impact energy can be absorbed with respect to the impact load input in the cell axis direction, the cell axis direction (extension direction of the prepreg convex portion) is When a load from a different direction, that is, a deflection load is input, the stress due to the input load is concentrated on the joint surface where the convex portions are joined together, resulting in separation of the joint surface, making it impossible to efficiently absorb energy. There was a fear.

  Therefore, an object of the present invention is to provide a honeycomb-like structure that can efficiently absorb energy even with respect to a deflection load, and an aggregate thereof.

  The honeycomb-like structure of the present invention is a honeycomb-like structure formed by joining the convex portions of the concavo-convex prepreg, and includes a first reinforcing portion provided on a side surface of the joined convex portions. And

  According to this honeycomb-like structure, even when a deflection load, in particular, a load having a component in a shear direction (a direction parallel to the joint surface between the convex portions) is input, the convex portions are projected by the first reinforcing portion. Separation of the joint surfaces between them is suppressed, and the honeycomb structure is maintained. Therefore, energy can be efficiently absorbed even with respect to the deflection load.

  Moreover, when the 1st reinforcement part is provided over the whole side surface of the joined convex parts, the intensity | strength of the honeycomb structure with respect to a deflection load will increase, and the said energy absorption effect will be improved further.

  Furthermore, as a configuration that effectively exhibits the above-described function, a configuration in which the first reinforcing portion is formed of an energy absorbing member can be given.

  Moreover, when the flange part joined to the end plate which covers the said edge part is provided in the edge part of the extension direction of a convex part, joining at the time of joining an end plate to the edge part of a honeycomb-like structure The area can be increased and the bonding strength can be increased.

  Moreover, when the 2nd reinforcement part formed of the energy absorption member is provided along the direction orthogonal to the side surface of the joined convex parts, a deflection load, especially a buckling direction (joint surface of convex parts) Even when a load having a component in a direction perpendicular to the input is input, buckling deformation of the honeycomb structure is suppressed by the second reinforcing portion, and the strength of the honeycomb structure is further increased.

  An aggregate of honeycomb-like structures according to the present invention is an aggregate of honeycomb-like structures in which a plurality of the honeycomb-like structures are arranged in a direction perpendicular to the extending direction of the protrusions. And a coated elastic member that covers the outer periphery of a plurality of honeycomb-like structures arranged side by side.

  According to this aggregate of honeycomb-like structures, even when a deflection load is input and the honeycomb-like structures are inclined, the honeycomb-like structures are pulled back by the intermediate elastic member and the coating elastic member, The reinforcing portion provided in each honeycomb-like structure absorbs energy by causing crushing. Therefore, energy can be efficiently absorbed even with respect to the deflection load.

  According to the present invention, energy can be efficiently absorbed even with respect to a deflection load.

1 is a perspective view showing a honeycomb-like structure according to a first embodiment of the present invention. FIG. 2 is a plan view showing the honeycomb-like structure in FIG. 1. It is a figure which shows the manufacturing process of the honeycomb-like structure of FIG. It is a figure which shows the manufacturing process following FIG. FIG. 2 is a plan sectional view showing a state of a cell portion when a deflection load is applied to the honeycomb-like structure of FIG. 1. It is a top view which shows the honeycomb-like structure which concerns on 2nd Embodiment. It is a perspective view which shows the complementary cell wall in the cell part in FIG. It is a figure which shows the manufacturing process of the honeycomb-like structure of FIG. FIG. 9 is a perspective view illustrating a manufacturing process subsequent to FIG. 8. It is a top view which shows the manufacturing process following FIG. FIG. 7 is a plan sectional view showing a state of a cell portion when a deflection load is applied to the honeycomb-like structure of FIG. 6. It is a perspective view which shows the honeycomb-like structure which concerns on 3rd Embodiment. It is a figure which shows the manufacturing process of the honeycomb-like structure of FIG. FIG. 10 is a perspective view showing a honeycomb-like structure according to a fourth embodiment with a part broken away. It is sectional drawing along the XV-XV line | wire of FIG. FIG. 15 is a perspective view illustrating a manufacturing process of the honeycomb-like structure in FIG. 14. It is a top view which shows the manufacturing process following FIG. FIG. 18 is a perspective view illustrating a manufacturing process subsequent to FIG. 17. FIG. 9 is a perspective view showing a partially broken body of a honeycomb-like structure according to a fifth embodiment. FIG. 20 is a side sectional view showing the assembly of FIG. 19. FIG. 21 is a side sectional view showing a state in which a deflection load is applied to the assembly of FIG. 20.

  Hereinafter, a honeycomb-like structure and an assembly thereof according to an embodiment of the present invention will be described with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant descriptions are omitted.

(First embodiment)
FIG. 1 is a perspective view showing a honeycomb-like structure according to the first embodiment, and FIG. 2 is a plan view showing the honeycomb-like structure of FIG.

  A honeycomb-like structure 1 shown in FIGS. 1 and 2 is mounted on an aircraft or the like and is for absorbing energy against an input load caused by a collision. The honeycomb-like structure 1 includes a plurality of hollow quadrangular cell portions 2 arranged like a honeycomb.

  The cell portion 2 is formed by bonding (joining) the convex portions of the concave-convex main cell wall 3 in which convex portions having a rectangular projecting surface and concave portions are continuously arranged. Thereby, while the several cell part 2 is formed so that it may shift | deviate in zigzag form with respect to the short direction (left-right direction of FIG. 2) of the junction surface of the convex parts of the main cell wall 3, each cell part 2 is formed. A cell hole 2a having a quadrangular cross section extending along the extending direction of the convex portion (vertical direction in FIG. 1) is formed. The main cell wall 3 is formed using, for example, a prepreg of carbon fiber reinforced plastics (hereinafter referred to as “CFRP”) (details will be described later). Here, the prepreg refers to an intermediate material for molding in which a finely woven cloth made of reinforcing fibers is impregnated with a thermosetting resin.

  Further, the honeycomb-like structure 1 includes a reinforcing wall (first reinforcing portion) 4 provided over the entire side surface (cell wall) of the joined convex portions. That is, the reinforcing wall 4 is bonded so as to cover the inner wall surfaces of the cell part 2 so as to cover the inner wall surfaces that are orthogonal to the bonding surfaces of the convex portions and face each other. This is a formed rectangular plate-shaped reinforcing member.

  Then, the manufacturing method of the said honeycomb-like structure 1 is demonstrated, referring FIG.3 and FIG.4. First, as materials used for manufacturing the honeycomb-like structure 1, a prepreg and a molded core are prepared. Here, as the prepreg, a carbon fiber impregnated with an epoxy resin which is a thermosetting resin is used. Moreover, as a shaping | molding core, the expanded polystyrene foam formed by the bead method (50 times foaming) is used. The same applies to the prepreg and the molded core in the following embodiments.

  First, as shown in FIG. 3, the surface has a concavo-convex shape having a width and a pitch matched to the shape of the cell part 2, and the height (depth) of the concave part is the length in the vertical direction of the cell part 2 in FIG. A concavo-convex mold 7 that is 1/2 the thickness is prepared. Next, one layer of the prepreg 6 is laminated on the concavo-convex mold 7 (see FIG. 3A), and after semi-curing in an atmosphere of 80 ° C. so that the curing depth is about 5%, FIG. ) To obtain a concavo-convex preform 3 </ b> F that becomes the main cell wall 3. Here, the preform refers to a prepreg formed in advance in a predetermined shape or an assembly of these in a predetermined shape.

  The above-mentioned curing depth means the degree of progress when the degree of curing of a commercially available predetermined prepreg is 0% and curing is further advanced. This curing depth is controlled by immersing the IDEX sensor on the surface of the prepreg and monitoring the Cure Index value in real time using a microdielectrometer (Eumetric System III; manufactured by Netzsch-Geratebau). .

  Next, as shown in FIG. 4, a square pillar-shaped reinforcing wall core 8 is prepared by cutting the molded core to match the size and shape of the cell hole 2a. Further, both side surfaces of the reinforcing wall core 8 are prepared. The core unit 9 is obtained by laminating the prepregs 4P to be the reinforcing walls 4 one by one. This core unit 9 is prepared for a predetermined number of cells and inserted so as to be fitted into the recesses of the preform 3F, and the recesses of the preform 3F are fitted into the inserted core unit 9 so that the preform 3F The preform 3F and the core unit 9 are stacked so that the convex portions are joined to each other. Thus, the preform 11 is obtained by repeatedly laminating the preform 3F and the core unit 9 so that the number of the cell portions 2 becomes a predetermined number.

  Next, the preform 11 is cured by the primary curing process and the main curing process. Here, the primary curing step is a step in which the preform is placed in a nylon film bag, and then the bag is vacuumed and cured at a temperature of 80 ° C. for 5 hours. In this primary curing step, the prepregs are in a semi-cured state, and the prepregs that come into contact with each other are self-adhered by the adhesive force of the prepregs themselves. The main curing step is a step of curing at a temperature of 130 ° C. for 1.5 hours after the primary curing step. In this main curing step, the prepreg is fully cured, and the molded core is reduced (shrinked) by heat shrinkage and disappears. The same applies to the primary curing step and the main curing step in the following embodiments.

  And the honeycomb-like structure of FIG. 1 in which the convex portions of the main cell walls 3 and the side surfaces of the joined convex portions and the reinforcing wall 4 are bonded by self-adhesion through the primary curing step and the main curing step. The body 1 is molded.

  According to the honeycomb-like structure 1 described above, a deflection load, in particular, a load F1 having a component in a shearing direction (a direction parallel to the joint surface between the convex portions) as shown in FIG. 5 is input. However, the reinforcing wall 4 suppresses separation of the joint surfaces between the convex portions, and the honeycomb structure is maintained. Therefore, energy can be efficiently absorbed even with respect to the deflection load F1.

  In addition, since the reinforcing wall 4 is provided over the entire side surfaces of the joined convex portions, the strength of the honeycomb structure against the deflection load F1 is increased, and the energy absorption effect is further enhanced.

  Thus, according to the honeycomb-like structure 1, even when the deflection load F1 is received, deterioration of energy absorption can be suppressed by holding the honeycomb structure.

(Second Embodiment)
FIG. 6 is a plan view showing a honeycomb-like structure according to the second embodiment, and FIG. 7 is a perspective view showing a complementary cell wall in the cell portion in FIG. The honeycomb-like structure 10 of the present embodiment is different from the honeycomb-like structure 1 of the first embodiment shown in FIGS. 1 and 2 in that instead of the reinforcing wall 4, the side surfaces (cell walls ), That is, provided with a supplemental cell wall (second reinforcing portion) 12 provided along a direction parallel to the short direction of the joint surface between the convex portions.

  The auxiliary cell wall 12 is a hollow quadrangular column-shaped reinforcing member formed of CFRP as an energy absorbing member, and has both ends of a rectangular ring shape at the center portion excluding the upper and lower ends of the cell hole 2a having a length L. The auxiliary cell wall end portion 12A is adhered to the inner wall surface of the cell portion 2 by self-adhesion, and 2 × 2 pieces are arranged per cell portion 2. In this honeycomb-like structure 10, the auxiliary cell wall end portion 12 </ b> A corresponds to a first reinforcing portion provided on the side surface of the joined convex portions.

  Then, the manufacturing method of the honeycomb-like structure 10 is demonstrated, referring FIGS. 8-10. In the following description, the “thickness”, “width”, and “length” with respect to the molded core are directions perpendicular to the bonding surfaces of the protrusions to be bonded, based on the honeycomb-like structure to be molded. , The length in the direction parallel to the short direction of the joint surface, and the length in the direction in which the cell holes 2a extend (the direction parallel to the longitudinal direction of the joint surface).

  First, as shown in FIG. 8, the molded core is cut, the thickness is ½ of the vertical length of the cell part 2 in FIG. 6, and the width is the horizontal length of the cell part 2 in FIG. 3 divided cores 13 having a length equal to 1/3 of the length L of the cell part 2 (length in the extending direction of the central part) are prepared, and the central divided core 13 is further increased in length. The cell is divided into two so as to be halved to obtain complementary cell cores 13a and 13a. Next, one layer of the prepregs 12P and 12P to be the complementary cell walls 12 is coated on the outer peripheral surfaces of the complementary cell cores 13a and 13a to obtain complementary cell subunits 13b and 13b.

  Next, the divided core 13, the complementary cell subunits 13 b and 13 b, and the divided core 13 are arranged in the length direction and temporarily bonded to obtain the complementary cell unit 14 having the length L equal to the cell portion 2. Further, as shown in FIG. 9, a predetermined number (three in FIG. 9) of auxiliary cell units 14 and a non-divided core 15, which is a molded core having the same shape as the auxiliary cell unit 14, are appropriately arranged and arranged in the width direction. The outer peripheral surfaces of the complement cell unit 14 and the non-divided core 15 thus obtained are coated with a single layer of prepreg 3P to be the main cell wall 3 so as to be uneven, thereby obtaining the main cell unit 17. In the main cell unit 17 shown in FIG. 9, three auxiliary cell units 14 having auxiliary cell subunits 13 b and 13 b are arranged in the width direction, and both sides thereof are sandwiched between non-divided cores 15.

  Next, as shown in FIG. 10, a predetermined number of prepared main cell units 17 are stacked in the thickness direction so that the convex portions of the prepreg 3 </ b> P face each other to obtain a preform 18. And the honeycomb-like structure 10 is shape | molded by hardening this preform 18 by a primary hardening process and a main hardening process. Whether or not the auxiliary cell wall 12 is formed for each cell portion 2 depends on whether or not the auxiliary cell subunit 13b is placed at a position corresponding to the cell portion 2 of the main cell unit 17 in the production of the preform 18 in the manufacturing process. It can be selected as appropriate depending on whether the complementary cell units 14 are arranged or the non-divided cores 15 are arranged.

  According to the honeycomb-like structure 10 described above, similarly to the honeycomb-like structure 1 of the first embodiment, a load F1 having a component of a deflection load, in particular, a shear direction (a direction parallel to the joint surface between the convex portions). Is input, the auxiliary cell wall end portion 12A suppresses the separation of the joint surfaces between the convex portions and maintains the honeycomb structure, so that energy is efficiently absorbed even with respect to the deflection load F1. be able to.

  Further, even when a deflection load, in particular, a load F2 having a component in the buckling direction (direction perpendicular to the joint surface between the convex portions) as shown in FIG. Buckling deformation of the honeycomb structure (cell part 2) is suppressed, and the strength of the honeycomb structure is further increased.

  Further, the auxiliary cell wall 12 is not limited to the case where the auxiliary cell wall 12 is disposed only at the center position excluding the upper and lower end portions of the cell hole 2a, and is provided over the entire extending direction (the entire length of the length L) of the cell hole 2a. It may be done. In this case, the complementary cell wall end portion 12A is provided over the entire side surface of the joined convex portions.

(Third embodiment)
FIG. 12 is a perspective view showing a honeycomb-like structure according to the third embodiment. As shown in FIG. 12, a honeycomb-like structure 10A according to this embodiment is obtained by arranging the cell portions 2 in the same manner as the honeycomb-like structure 10 (see FIG. 6) according to the second embodiment. This honeycomb-like structure 10A differs from the honeycomb-like structure 10 of the second embodiment shown in FIGS. 6 and 7 in that it is separated in the direction in which the cell holes 2a extend in place of the hollow quadrangular columnar auxiliary cell walls 12. However, this is a point provided with a plate-like auxiliary cell wall (second reinforcing portion) 19 provided to face each other.

  This auxiliary cell wall 19 is also a reinforcing member formed of CFRP, which is an energy absorbing member, like the auxiliary cell wall 12 of the second embodiment, and is joined at the position of the central portion excluding the upper and lower ends of the cell hole 2a. 2 × 2 sheets are provided for each cell portion 2 along a direction perpendicular to the side surfaces (cell walls) of the protruding portions. A complementary cell wall end 19A that is bent along the inner wall surface of the cell portion 2 is formed at both ends of each complementary cell wall 19. It is bonded to the inner wall surface by self-adhesion. In the honeycomb-like structure 10A, the auxiliary cell wall end portion 19A corresponds to a first reinforcing portion provided on the side surface of the joined convex portions.

  Next, a method for manufacturing the honeycomb-like structure 10A will be described with reference to FIG. The manufacturing method of the honeycomb-like structure 10A is different from the manufacturing method of the honeycomb-like structure 10 of the second embodiment, in the process of manufacturing the main cell unit 17 (see FIG. 9), instead of the auxiliary cell unit 14. A complementary cell unit 14a having a complementary cell subunit 13c in the middle of which one layer of prepregs 19P and 19P serving as a complementary cell wall 19 is coated on both end surfaces (edge surfaces) in the length direction of the central divided core 13 is used. It was a point.

  In the complementary cell subunit 13c of the complementary cell unit 14a, the prepregs 19P and 19P are covered to a part of the end face in the width direction of the split core 13, and the part covered by a part of the end face is the end part of the auxiliary cell wall. 19A. Other steps are the same as those in the second embodiment (see FIGS. 9 and 10).

  Also in the above honeycomb-like structure 10A, the same actions and effects as those of the honeycomb-like structure 10 can be obtained. That is, according to the honeycomb-like structure 10A, even when the load F1 having a component in the shearing direction (the direction parallel to the joint surface between the protrusions) is input, the protrusions are formed by the auxiliary cell wall end 19A. Separation of the joint surfaces between each other is suppressed and the honeycomb structure is maintained, so that energy can be efficiently absorbed even with respect to the deflection load F1, and further, the buckling direction (perpendicular to the joint surface between the convex portions). Even when a load F2 having a component in a small direction is input, buckling deformation of the honeycomb structure is suppressed by the auxiliary cell wall 19, and the strength of the honeycomb structure is further increased.

(Fourth embodiment)
FIG. 14 is a perspective view showing a partially broken honeycomb-like structure according to the fourth embodiment, and FIG. 15 is a cross-sectional view taken along line XV-XV in FIG. The difference between the honeycomb-like structure 20 of the present embodiment and the honeycomb-like structure 10 of the second embodiment shown in FIGS. 6 and 7 is provided at both ends of the main cell wall 3 in the extending direction of the protrusions. In addition, a so-called sandwich structure is further provided with a plurality of flanges (flange portions) 22 and a main wall (end plate) 21 that is joined to the flanges 22 and is provided so as to cover the both end portions.

  The flange 22 is continuous with the convex portion at both end portions (upper and lower end portions in the drawing) corresponding to a part of the cell portions 2 of the main cell wall 3 forming the plurality of cell portions 2, and the convex portion The cell part 2 is folded back to the center of the cross section of the cell part 2 so as to be orthogonal to the extending direction (so as to cover half of the cell hole 2a), and is formed of CFRP like the main cell wall 3. The main wall 21 is a rectangular flat plate formed of a plurality of layers of CFRP extending in a direction orthogonal to the extending direction of the convex portion, and is self-adhering to the end surface of the main cell wall 3 and the flange 22. Bonded and fixed.

  Next, a method for manufacturing the honeycomb-like structure 20 will be described with reference to FIGS. The difference between the manufacturing method of the honeycomb-like structure 20 and the manufacturing method of the honeycomb-like structure 10 of the second embodiment is that instead of a part of the main cell unit 17 constituting the preform 18 (see FIG. 10), This is a point using the main cell unit 23 in which the prepreg 22P serving as the flange 22 is coated on both end surfaces in the length direction of the auxiliary cell unit 14 (see FIG. 9), and a step of forming the main wall 21.

  As shown in FIG. 16, in the main cell unit 23, the prepreg 22 </ b> P is covered with every other auxiliary cell unit 14 among the plurality of auxiliary cell units 14 arranged in the width direction (three in FIG. 16). The In other words, the prepreg 22P is covered so as to continuously cover the end portion of only the convex portion of the prepreg 3P covered in an uneven shape. Next, the same number of main cell units 23 and the main cell units 17 (see FIG. 9) that are not covered with the prepreg 22P are prepared and stacked in the thickness direction so that the convex portions of the prepreg 3P face each other. Then, a preform 24 is obtained (see FIG. 17).

  Further, a plurality of prepregs 21P to be the main walls 21 are laminated over the entire end faces (upper and lower faces in FIG. 18) in the length direction of the preform 24 to obtain a sandwich panel preform 25. Then, the sandwich-like structure 20 shown in FIG. 14 is formed by curing the sandwich panel preform 25 by the primary curing process and the main curing process. The flanges 22 may be formed at both ends of the convex portions corresponding to all the cell portions 2, or may be formed so as to cover the cell holes 2a substantially completely.

  According to the honeycomb-like structure 20 described above, the bonding area of the main wall 21 to the main cell wall 3 is increased, and the bonding strength can be increased.

  Moreover, it can also be set as a sandwich structure by providing the flange 22 and the main wall 21 with respect to the honeycomb-like structure 1 of 1st Embodiment shown in FIG.

(Fifth embodiment)
FIG. 19 is a partially cutaway perspective view showing an aggregate of honeycomb-like structures according to the fifth embodiment, and FIG. 20 is a side sectional view showing the aggregate of FIG. The honeycomb-like aggregate 30 according to the present embodiment is obtained by replacing the honeycomb-like structure 10B having the same configuration as the honeycomb-like structure 10 of the second embodiment shown in FIGS. It is the aggregate | assembly formed by arranging two or more in the shape of a grid | lattice in the direction orthogonal to the extending direction. In FIGS. 19 and 20, the honeycomb-like structure 10B is depicted in a simplified manner.

  More specifically, each honeycomb-like structure 10B is configured to include the eight cell portions 2 of the honeycomb-like structure 10 shown in FIG. 6, and the main cell wall 3 that does not form the cell portion 2 is formed. The ends (left and right ends in FIG. 6) are removed. In addition, a large number of supplemental cell walls (second reinforcing portions) 31 of the honeycomb-like structure 10B are arranged so as to overlap in a vertical direction with respect to the supplementary cell walls 12 (see FIGS. 6 and 7) of the honeycomb-like structure 10. .

  Further, as shown in FIGS. 19 and 20, the honeycomb-like aggregate 30 has a rectangular parallelepiped shape, and is an intermediate elastic film (intermediate elastic film) made of a silicon unvulcanized elastomer coated on the outer surface of each honeycomb-like structure 10B. Member) 32 and a coated elastic film (coated elastic member) 33 made of an unvulcanized silicon elastomer covering the outer periphery of the group of honeycomb-like structures 10B arranged side by side with the intermediate elastic film 32 interposed therebetween. ing.

  Here, the coated elastic film 33 covers at least three surfaces of the group of the honeycomb-like structures 10B grouped together.

  The honeycomb-like aggregate 30 covers the honeycomb-like structure 10B with the intermediate elastic film 32, and further coats the outer peripheral surface on which the honeycomb-like structures 10B are arranged side by side with the film elastic film 33, and then 120 ° C. It is molded by performing primary vulcanization at a temperature of 10 minutes over 10 minutes and then performing secondary vulcanization at a temperature of 200 ° C. over 4 hours.

  According to the honeycomb-like aggregate 30 described above, as shown in FIG. 21, the deflection load F, that is, the load from a direction different from the extending direction of the cell part 2 of the honeycomb-like structure 10B (vertical direction in FIG. 21). Even when F is input and the honeycomb-like structures 10B are tilted, the honeycomb-like structures 10B are pulled back by the intermediate elastic film 32 and the coating elastic film 33 and are provided in the honeycomb-like structures 10B. Further, the complementary cell wall 31 absorbs energy by facing the deflection load F and causing successive crushing. Therefore, energy can be efficiently absorbed even with respect to the deflection load F.

  In addition, when a deflection load having a component in a direction orthogonal to the deflection load F in FIG. 21 is input, the end portion of the auxiliary cell wall 31 as the first reinforcement portion sequentially collapses against the deflection load. Thus, an action and effect of absorbing energy can be obtained.

  The honeycomb-like structure and the aggregate according to the embodiment of the present invention have been described above, but the present invention is not limited to the above-described embodiment. For example, in the above-described embodiment, the case where the main cell walls 3 of the honeycomb-like structures 1, 10, 10A, 10B, and 20 are formed by a single layer prepreg is described. However, the main cell walls 3 are formed by a plurality of layers of prepregs. Also good. Similarly, the reinforcing wall 4 of the honeycomb-like structure 1, the auxiliary cell wall 12 of the honeycomb-like structure 10, the auxiliary cell wall 19 of the honeycomb-like structure 10A, the auxiliary cell wall 31 of the honeycomb-like structure 10B, and the honeycomb The flange 22 of the like structure 20 may also be formed of a plurality of layers of prepregs.

  Further, in the honeycomb-like aggregate 30 of the fifth embodiment, the plurality of honeycomb-like structures 10B have substantially the same configuration as the honeycomb-like structure 10 of the second embodiment, but the fourth embodiment Similarly to the honeycomb-like structure 20, a sandwich structure including the flange 22 and the main wall 21 may be used.

  In the honeycomb-like aggregate 30 of the fifth embodiment, the case where the plurality of honeycomb-like structures 10B are arranged in a lattice shape has been described. However, the honeycomb-like aggregates 10B may be staggered. Furthermore, the honeycomb-like structure 10B of the honeycomb-like aggregate 30 is not limited to the case where the plurality of cell portions 2 are formed by joining the concavo-convex prepreg, and the prepreg is applied to the outer peripheral surface of the square columnar molded core. You may be comprised from the single cell part formed by coating.

1, 10, 10A, 10B, 20 ... honeycomb-like structure, 3P ... prepreg, 4 ... reinforcing wall (first reinforcing part), 6 ... prepreg, 12, 19, 31 ... auxiliary cell wall (second reinforcing part), 12A, 19A ... complementary cell wall end (first reinforcing part), 21 ... main wall (end plate), 22 ... flange (flange), 30 ... honeycomb-like aggregate (aggregate of honeycomb-like structure), 32 ... intermediate elastic membrane (intermediate elastic member), 33 ... coated elastic membrane (coated elastic member).

Claims (6)

It is a honeycomb-like structure formed by joining convex portions of concavo-convex prepregs,
A honeycomb-like structure comprising a first reinforcing portion provided on the side surfaces of joined convex portions.   The honeycomb-like structure according to claim 1, wherein the first reinforcing portion is provided over the entire side surface of the joined convex portions.   The honeycomb-like structure according to claim 1 or 2, wherein the first reinforcing portion is formed of an energy absorbing member.   The honeycomb-like structure according to any one of claims 1 to 3, wherein a flange portion joined to an end plate that covers the end portion is provided at an end portion in the extending direction of the convex portion.   The honeycomb-like structure according to any one of claims 1 to 4, wherein a second reinforcing portion formed of an energy absorbing member is provided along a direction orthogonal to the side surfaces of the joined convex portions. An aggregate of honeycomb-like structures, wherein a plurality of honeycomb-like structures according to claim 5 are arranged side by side in a direction perpendicular to the extending direction of the protrusions,
An intermediate elastic member sandwiched between the honeycomb-like structures,
An assembly of honeycomb-like structures, comprising: a coating elastic member covering an outer periphery of a plurality of honeycomb-like structures arranged side by side.

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