JP2006273271A - Energy absorption member for vehicle and door guard beam using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an energy absorption member for a vehicle excellent in energy absorption characteristics and capable of attempting weight reduction and miniaturization with less restriction in layout design. <P>SOLUTION: A door guard beam 10a is provided with a load receiving member 20a to receive a load applied on an automobile from the outside, a flange member 30a constituted of a fiber reinforcing composite material and a connecting member 50 to connect the load receiving member 20a and the flange member 30a to each other, the flange members 30a are mounted on both ends of the load receiving member 20a through a connecting member 50, and, each of the flange members is connected to a door inner panel 3 of the automobile. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicle energy absorbing member for absorbing energy of a load applied to a vehicle from the outside, and a door guard beam using the same.

  Conventionally, as an energy absorbing member used in vehicles such as automobiles, a door guard beam provided between a door outer panel and a door inner panel constituting a door structure for absorbing energy of a load applied from the side of the automobile has been conventionally used. (See, for example, Patent Documents 1 to 6).

  Since such a door guard beam is generally made of steel as a whole, it has excellent energy absorption characteristics, but its weight is limited because of its increased weight. Therefore, in recent years, aluminum alloy has attracted attention as a material constituting the door guard beam from the viewpoint of weight reduction.

However, when the door guard beam is made of an aluminum alloy, if an energy absorption characteristic equivalent to that of a steel material is to be imparted, there will be a new layout design limitation in the door structure such as an increase in plate thickness or an increase in size. There is a problem.
JP-A-5-38992 JP-A-8-216684 JP-A-10-58973 Japanese Utility Model Publication No. 5-49434 Japanese Utility Model Publication No. 5-54026 Japanese Utility Model Publication No. 5-58428

SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle energy absorbing member that has excellent energy absorption characteristics and can be reduced in weight and size with less restrictions on layout design, and a door guard beam using the same.
To achieve the above object, according to the present invention, there is provided a vehicle energy absorbing member for absorbing energy of a load applied to the vehicle from the outside, wherein the load receiving member receives the applied load. A flange member made of a fiber reinforced composite material, and the load receiving member uses the vehicle energy absorbing member attached to the vehicle via the flange member, and the vehicle energy absorbing member. A door guard beam was provided.

  In the present invention, a load receiving member for receiving a load applied to the vehicle from the outside is attached to the vehicle via a flange member made of a fiber reinforced composite material. When a load is applied, the load is transmitted from the load receiving member to the flange member, and the flange member is destroyed by the load, thereby applying a reaction force against the load and absorbing the energy of the load.

  Thus, by comprising a flange member with a fiber reinforced composite material, it becomes possible to achieve weight reduction compared with the conventional thing comprised entirely with the metal material. In addition, by configuring the flange member with a fiber reinforced composite material, the vehicle energy absorbing member can be configured in a planar manner, and thus the size can be reduced.

  Furthermore, by changing the plate thickness, laminated structure, fiber orientation angle, etc. of the fiber reinforced composite material that constitutes the flange member, the reaction force of the vehicle energy absorbing member can be freely set, so that excellent energy absorption is achieved. It is possible to ensure the characteristics. In addition, the reaction force can be freely set depending on the configuration of the fiber-reinforced composite material, so that the degree of freedom in layout design is greatly improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
FIG. 1 is a perspective view showing a door guard beam according to the first embodiment of the present invention, and FIG. 2 is a plan view of the door guard beam according to the first embodiment of the present invention.

  As shown in FIGS. 1 and 2, the door guard beam 10a according to the first embodiment of the present invention includes a load receiving member 20a for receiving a load applied to the vehicle from the outside, and a fiber reinforced composite material. A flange member 30a; and a connecting member 50 that connects the load receiving member 20a and the flange member 30a. The flange member 30a is attached to both ends of the load receiving member 20a via the connecting member 50, respectively. Further, each flange member 30a is joined to a door inner panel 3 constituting the door structure 1 of the vehicle. Examples of the method of joining the flange member 30a to the door inner panel 3 can include methods such as adhesion, bolt fastening, and riveting, but the surface pressure breaking load of a through hole 35 (described later) of the flange member 30a. Any method may be selected as long as stronger bonding strength can be secured.

  3 is a perspective view showing a flange member used in the door guard beam according to the first embodiment of the present invention, FIG. 4 is a perspective view showing a laminated structure of fiber reinforced composite materials constituting the flange member of FIG. 3, and FIG. FIG. 6 is a partially enlarged sectional view showing the through hole of the flange member of FIG. 3, and FIG. 7 is a view of the through hole of the flange member of FIG. It is a partial enlarged front view which shows another example.

  The flange member 30a of the door guard beam 10a is made of a fiber reinforced composite material (FRP: Fiber Reinforced Plastic) composed of a synthetic resin material as a matrix (base material) and reinforcing fibers (reinforcing material). As shown in FIG. 2, the plate thickness is about 3.2 mm. A through hole 35 for connecting the load receiving member 20a by the connecting member 50 is formed in the flange member 30a.

  Examples of the matrix of the fiber reinforced composite material include thermosetting resin materials such as epoxy resin, unsaturated polyester resin, and vinyl ester resin, and thermoplastic resins such as nylon, polypropylene, polycarbonate, and thermoplastic polyimide. Materials etc. can be mentioned.

  Examples of the reinforcing fiber of the fiber-reinforced composite material include glass fiber, carbon fiber, aramid fiber, boron fiber, polyethylene fiber, PBO fiber, and polyester fiber. Among these, CFRP and KFRP using carbon fiber or aramid fiber as a reinforcing material are particularly preferable from the viewpoint of high rigidity.

  As shown in FIG. 4, this fiber-reinforced composite material has a first plain weave cloth 31 in which reinforcing fibers are woven at a fiber orientation angle of 0 degrees and 90 degrees, and a reinforcing fiber is woven at a fiber orientation angle of ± 45 degrees. The second plain weave cloth 32 is alternately laminated to constitute the flange member 30a. That is, the fiber reinforced composite material constituting the flange member 30a is composed of 25% reinforcing fiber having a fiber orientation angle of 0 °, 25% reinforcing fiber having a fiber orientation angle of 90 °, and reinforcing fiber having a fiber orientation angle of ± 45 °. In addition, the first plain weave cloth 31 and the second plain weave cloth 32 are laminated so as to be pseudo-isotropic. Note that the first plain weave cloth 31 in the present embodiment corresponds to the first base material in the claims, and the second plain weave cloth 32 in the present embodiment corresponds to the second base material in the claims. To do.

  Here, the fiber reinforced composite material has a failure mode (for example, tensile failure, shear failure, surface pressure failure, etc.) that can occur when a load is applied by changing the lamination configuration, fiber orientation angle, etc., or by stitching. However, in the present embodiment, the reinforcing members having the fiber orientation angles of 0 degrees, 90 degrees, and ± 45 degrees are provided with the flange member 30a in the ratio of 25%: 25%: 50% as described above. By configuring, it is possible to generate a surface pressure failure (bearing failure, bearing failure) that causes the through hole 35 to be broken into a long hole without causing a tensile failure or a shear failure in the flange member 30a. (See FIG. 12).

  In this way, by causing a surface pressure fracture based on the through hole 35 as a fracture mode generated in the flange member 30a when a load is applied, a reaction force against the load can be maintained when the load is applied, and the door guard beam 10a. In addition, good energy absorption characteristics can be secured.

  In the present invention, the proportions of the reinforcing fibers having the fiber orientation angles of 0, 90 degrees and ± 45 degrees are not limited to the above ratio, and the flange member is configured by satisfying the following conditional expression. Surface pressure destruction can be generated in the through hole 35 of 30a.

α + β + γ = 100%
α = 10-40%
β = 10-40%
γ = 30-70%
Where α is the ratio [%] of the reinforcing fibers contained in the fiber reinforced material constituting the flange member 30a and having a fiber orientation angle of 0 degree, and β is the fiber reinforced composite material constituting the flange member 30a. Of the reinforcing fibers contained, the ratio [%] of fibers having a fiber orientation angle of 90 degrees, and γ is the fiber orientation angle of the reinforcing fibers contained in the fiber reinforced composite material constituting the flange member 30a is ±. It is the ratio [%] of 45 degrees.

  The diameter of the through hole 35 formed in the flange member 30a is determined according to the required energy absorption amount. FIG. 5 is a graph showing the relationship between the plate thickness of the flange member 30a and the surface pressure breaking load of the through hole 35 when the diameter of the through hole 35 is φ6.4 mm. Such a graph is created for each diameter of the through-hole 35, and the relationship among the diameter of the through-hole 35, the plate thickness of the flange member 30a, and the surface pressure breaking load of the through-hole 35 is compiled in a database. Then, the optimum diameter of the through hole 35 is determined by referring to the database based on the surface pressure fracture load derived from the required energy absorption amount and the plate thickness of the flange member 30a.

  Further, as shown in FIG. 6, the through hole 35 of the flange member 30a has a taper 36 formed at the periphery of the opening. When the taper 36 acts as a trigger when a load is applied, the surface pressure failure of the through hole 35 can be reliably generated as a failure mode generated in the flange member 30a. In the present invention, the present invention is not limited to this. For example, as shown in FIG. 7, a notch 37 is formed on the periphery of the opening of the through hole 35 in the direction in which surface pressure destruction is generated, for example, in the direction in which the door guard beam extends. The notch 37 may be used as a trigger when a load is applied.

  FIG. 8 is a perspective view showing a load receiving member used for the door guard beam according to the first embodiment of the present invention, and FIG. 9 is another example of the load receiving member used for the door guard beam according to the first embodiment of the present invention. It is a perspective view shown.

  The load receiving member 20a of the door guard beam 10a has a belt-like shape as shown in FIG. 8, and mounting holes 21 are provided at both ends thereof so that it can be connected to the flange member 30a via the connecting member 50. Is formed. The load receiving member 20a is made of the above-described fiber reinforced composite material, and among them, it is preferable that the load receiving member 20a is made of CFRP using carbon fiber as a reinforcing material from the viewpoint of high strength and light weight. The load receiving member 20a has a tensile load resistance stronger than the surface pressure breaking load of the through-hole 35 formed in the flange member 30a, and can be deformed in the application direction by the load when the load is applied. By making it deformable in the load application direction, the applied load can be converted into a tension acting on the through hole 35 of the flange member 30a. The surface pressure load resistance of the mounting hole 21 of the load receiving member 20a is also set to be stronger than the surface pressure breaking load of the through hole 35 of the flange member 30a.

  Note that the load receiving member in the present invention has a tensile load that is stronger than the surface pressure breaking load of the through hole formed in the flange member, and can be deformed in the application direction by the load when the load is applied. The load receiving member 20b is not limited to such a CFRP belt, and may be, for example, a steel wire as shown in FIG.

  FIG. 10 is an enlarged sectional view showing a connecting member used for the door guard beam according to the first embodiment of the present invention.

  As shown in FIG. 10, the connecting member 50 of the door guard beam 10 a according to this embodiment includes a collar 51, a bolt 52, and a nut 53. Then, the collar 51 is inserted into the mounting hole 21 of the load receiving member 20a and the through hole 35 of the flange member 30a, the bolt 52 is inserted into the inner hole of the collar 51, and the nut 53 is fastened to the bolt 52. Thus, the load receiving member 20 a and the flange member 30 a are connected by the connecting member 50.

  When the automobile door structure 1 is configured using the door guard beam 10a as described above, first, the flange members 30a at both ends of the door guard beam 10a are joined to the door inner panel 3 as shown in FIG. The door guard beam 10a is fixed to the door inner panel 3. Next, after the door inner panel 3 is overlaid on the door outer panel 2, the outer periphery of the door outer panel 2 is hemmed and spot welded to fix the door outer panel 2 and the door inner panel 3. Composed.

  Next, the operation will be described.

  FIG. 11 is a plan view showing a state in which a load is applied to the door guard beam according to the first embodiment of the present invention. FIG. 12 is a plan view of the flange member with a load applied to the door guard beam according to the first embodiment of the present invention. FIG. 13 is a graph showing the relationship between the deformation angle of the load receiving member and the reaction force generated in the load application direction.

  When a load is applied to the door structure 1 of the automobile from the outside of the vehicle, the load acts on the load receiving member 20 a provided inside via the door outer panel 2. The load receiving member 20a that has received the load is deformed in the direction of arrow A (load application direction) in FIG. 11 and the flange member 30a itself is bent inward of the vehicle while the load causes the load receiving member 20a and the connecting member 50 to be bent. And transmitted as tension (arrow B in the figure) to the flange member 30a.

  When this tension reaches the surface pressure breaking load of the through-hole 35, the fiber reinforced composite material constituting the flange member 30a becomes quasi-isotropic, so that the through-hole is formed in the flange member 30a as shown in FIG. At the same time as the surface pressure fracture with reference to 35 occurs in the direction of arrow C (see FIGS. 11 and 12), a reaction force (arrow D in FIG. 11) is applied to the load application point, and the energy of the applied load is absorbed. Is done. At this time, since the load application point is displaced inward of the door structure 1 due to the inward deformation of the load receiving member 20a, as shown in FIG. 13, the deformation angle θ of the load receiving member 20a (see FIG. 12). Accordingly, the reaction force applied to the load application point gradually increases. By the way, in the conventional one that is entirely composed of a metal material, the maximum reaction force is generated at the initial stage of applying the load, and then the reaction force rapidly decreases. The cross-sectional shape needs to be enlarged, which is accompanied by a significant increase in weight.

FIG. 14 is a cross-sectional view showing another example of a flange member used in the door guard beam according to the present embodiment. In this embodiment, the flange member 30a, as shown in FIG. 14, may have a thickness which gradually decreases to t ₂ from t ₁ toward the load receiving member 20a side from the junction of the door inner panel 3 Good (t ₁ > t ₂ ). Thickness _{t 1} is, for example, about 6.4 mm, the thickness _{t 2} is, for example, about 3.2 mm.

  When the plate thickness of the flange member 30a is constant, the reaction force against the load is proportional to the deformation angle θ of the load receiving member 20a as shown by the solid line in FIG. Only reaction force can be obtained. On the other hand, by partially increasing the plate thickness of the flange member 30a as described above, it is possible to obtain a relatively large reaction force even at the initial stage of load application, as indicated by a dotted line in FIG. Thus, the amount of energy absorption can be improved.

  In addition, as a method of increasing the reaction force at the initial stage of load application, in addition to a method of partially increasing the plate thickness of the flange member 30a, the fiber orientation of the fiber-reinforced composite material constituting the flange member 30a is partially changed. It is also possible to list techniques and stitching techniques.

  As described above, in the present embodiment, the flange member 30a is made of a fiber-reinforced composite material, so that the weight can be reduced as compared with the conventional one made entirely of a metal material. In addition, by configuring the flange member with a fiber reinforced composite material, the door guard beam can be configured in a planar manner, so that it is possible to reduce the size.

  Furthermore, the fiber reinforced composite material can be freely set in its strength and fracture mode by changing the plate thickness, laminated structure, fiber orientation angle, etc. In this embodiment, the fiber having such characteristics By configuring the flange member 30a with the reinforced composite material, the reaction force of the door guard beam 10a can be freely set, and excellent energy absorption characteristics can be secured. In addition, the reaction force can be freely set depending on the configuration of the fiber-reinforced composite material, so that the degree of freedom in layout design is greatly improved.

[Second Embodiment]
15 is a plan view showing a door guard beam according to the second embodiment of the present invention, FIG. 16 is a perspective view showing a hinge member used for the door guard beam according to the second embodiment of the present invention, and FIG. 17 is shown in FIG. FIG. 18 is a sectional view taken along line XVIII-XVIII in FIG. 16, FIG. 19 is a perspective view showing a hinge member used for a door guard beam according to the third embodiment of the present invention, and FIG. It is a top view which shows the state by which the load was applied to the door guard beam which concerns on 2nd Embodiment of this invention.

  The door guard beam 10b according to the second embodiment of the present invention is different from the door guard beam 10b according to the first embodiment described above in that it includes a hinge member 40a as shown in FIG. This is the same as the door guard beam 10a according to the first embodiment. Below, only the difference of the door guard beam 10a which concerns on 1st Embodiment is demonstrated about the door guard beam 10b which concerns on 2nd Embodiment.

  As shown in FIGS. 16 to 18, the hinge member 40 a of the door guard beam 10 b according to the present embodiment allows the first and second plates 41 and 42 made of metal to be hinged around the metal shaft 41. It is configured. A flange member 30b made of a fiber reinforced composite material in which through holes 35 are formed is attached to both main surfaces of the first plate 41 with an adhesive. The first plate 41 is formed with a notch 44 that extends from the portion corresponding to the through hole 35 to the opposite side of the shaft 43 and opens at the end surface of the first plate 41. By forming such a cut-out portion 44 in the first plate 41, it is possible to cause a surface pressure failure with respect to the through-hole 35 in each flange member 30b. The mounting hole of the load receiving member 20a is aligned with the through hole 35 of the flange member 30b and the cutout portion 44 of the hinge member 40a, and the connecting member 50 is inserted to connect the load receiving member 20a and the hinge member 40a. .

  The second plate 42 has two mounting holes 45 for attaching the hinge member 40a to the door inner panel 3 by rivets. The hinge member 40a is bonded to the adhesive and rivets by the second plate 42. By this, it is fixed to the door inner panel 3.

  In addition, like the hinge member 40b shown in FIG. 19, you may comprise the 1st plate 41 and 2nd plate 42 itself with a fiber reinforced composite material except the shaft 43. FIG. In this case, only the through hole 35 is formed in the first plate 41 without forming the notch 44.

  Next, the operation will be described.

  When a load is applied to the door structure 1 from the outside of the vehicle, the load acts on the load receiving member 20a via the door outer panel 2 as in the first embodiment, and the direction of arrow A in FIG. Deforms in the direction of load application. At this time, the first plate 41 of the hinge member 40a rotates with respect to the second plate 42 in the load application direction with the shaft 43 as the central axis.

  The load applied to the load receiving member 20a is transmitted as a tension to the flange member 30b via the load receiving member 20a and the connecting member 50, and when the surface pressure breaking load of the through hole 35 is reached, the through hole 35 is passed through the through hole 35. At the same time as the reference surface pressure failure occurs in the direction of arrow C, a reaction force (arrow D) is applied to the load application point, and the energy of the applied load is absorbed. At this time, since the load application point is displaced inward of the door structure 1 due to the inward deformation of the load receiving member 20a, the deformation angle θ (see FIG. 20) of the load receiving member increases, The reaction force applied to the application point also gradually increases.

  As described above, in the present embodiment, the flange member 30b is made of a fiber-reinforced composite material, so that the weight can be reduced as compared with the conventional one made entirely of a metal material. In addition, by configuring the flange member 30b with a fiber reinforced composite material, the door guard beam 10b can be configured in a planar manner, so that the size can be reduced.

  Furthermore, the fiber-reinforced composite material can be freely set in strength and fracture mode by changing the plate thickness, laminated configuration, fiber orientation angle, etc., but this embodiment has such characteristics. By configuring the flange member 30b with a fiber reinforced composite material, the reaction force of the door guard beam 10b can be freely set, and excellent energy absorption characteristics can be secured. In addition, the reaction force can be freely set depending on the configuration of the fiber-reinforced composite material, so that the degree of freedom in layout design is greatly improved.

  In the present embodiment, since the flange member 30a is attached to the door inner panel 3 via the hinge member 40a, the flange member itself is subjected to a bending load even when the deformation angle θ of the load receiving member 20a is increased when a load is applied. It is possible to prevent damage due to deformation of the flange member, and to generate only the intended failure mode (surface pressure failure) in the flange member 30b.

  The embodiment described above is described for facilitating the understanding of the present invention, and is not described for limiting the present invention. Therefore, each element disclosed in the above embodiment is intended to include all design changes and equivalents belonging to the technical scope of the present invention.

  For example, in the above-described embodiment, the load receiving member and the flange member are connected by the connecting member. However, the present invention is not particularly limited to this, and both ends of the load receiving member are connected to the flange member without providing the connecting member. The load receiving member and the flange member may be directly connected, for example, by being inserted into the through hole.

  The vehicle energy absorbing member of the present invention can also be used for members other than the door guard beam that absorbs the energy of a load applied to the vehicle from the outside.

FIG. 1 is a perspective view showing a door guard beam according to the first embodiment of the present invention. FIG. 2 is a plan view of the door guard beam according to the first embodiment of the present invention. FIG. 3 is a perspective view showing a flange member used in the door guard beam according to the first embodiment of the present invention. 4 is a perspective view showing a laminated configuration of fiber reinforced composite materials constituting the flange member of FIG. FIG. 5 is a graph showing the relationship between the plate thickness of the flange member and the surface pressure breaking load of the through hole. 6 is a partially enlarged cross-sectional view showing a through hole of the flange member of FIG. 7 is a partially enlarged front view showing another example of the through hole of the flange member of FIG. FIG. 8 is a perspective view showing a load receiving member used in the door guard beam according to the first embodiment of the present invention. FIG. 9 is a perspective view showing another example of a load receiving member used in the door guard beam according to the first embodiment of the present invention. FIG. 10 is an enlarged cross-sectional view showing a connecting member used in the door guard beam according to the first embodiment of the present invention. FIG. 11 is a plan view showing a state in which a load is applied to the door guard beam according to the first embodiment of the present invention. FIG. 12 is a perspective view showing a state in which a load is applied to the door guard beam according to the first embodiment of the present invention and a surface pressure fracture occurs in the flange member. FIG. 13 is a graph showing the relationship between the deformation angle of the load receiving member and the reaction force generated in the load application direction. FIG. 14 is a partially enlarged sectional view showing another example of a flange member used in the door guard beam according to the first embodiment of the present invention. FIG. 15 is a plan view showing a door guard beam according to the second embodiment of the present invention. FIG. 16 is a perspective view showing a hinge member used for the door guard beam according to the second embodiment of the present invention. FIG. 17 is an exploded perspective view of the hinge member shown in FIG. 18 is a cross-sectional view taken along line XVIII-XVIII in FIG. FIG. 19 is a perspective view showing another example of the hinge member used for the door guard beam according to the third embodiment of the present invention. FIG. 20 is a plan view showing a state in which a load is applied to the door guard beam according to the second embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Door structure 2 ... Door outer panel 3 ... Door inner panel 10a, 10b ... Door guard beam 20a, 20b ... Load receiving member 21 ... Mounting hole 30a, 30b ... Flange member 31 ... First plain weave cloth 32 ... Second plain weave Cross 35 ... Through hole 36 ... Taper 37 ... Notch 40a, 40b ... Hinge member 41 ... First plate 42 ... Second plate 43 ... Shaft 44 ... Notch 45 ... Mounting hole 50 ... Connecting member 51 ... Collar 52 ... Bolt 53 ... Nut

Claims (14)

An energy absorbing member for a vehicle for absorbing energy of a load applied to the vehicle from the outside,
A load receiving member for receiving an applied load;
A flange member made of a fiber-reinforced composite material,
The load receiving member is a vehicle energy absorbing member attached to the vehicle via the flange member.   The energy absorbing member for a vehicle according to claim 1, wherein a through hole for fixing the load receiving member to the flange member is formed in the flange member.   The vehicle energy absorbing member according to claim 2, wherein the load receiving member is fixed to the through hole of the flange member via a connecting member. The flange member is
A first base material in which reinforcing fibers are oriented in a predetermined direction;
The vehicle energy absorbing member according to any one of claims 1 to 3, wherein the vehicle energy absorbing member is configured by laminating a second base material in which reinforcing fibers are oriented in a direction different from the first base material.   The vehicle energy absorbing member according to claim 4, wherein the flange member is configured such that surface pressure breakage occurs in the through hole. The first substrate is
A reinforcing fiber having a fiber orientation angle of 0 degrees;
Reinforcing fibers having a fiber orientation angle of 90 degrees,
The second substrate is
A reinforcing fiber having a fiber orientation angle of -45 degrees;
The vehicle energy absorbing member according to claim 4, comprising a reinforcing fiber having a fiber orientation angle of +45 degrees and satisfying the following conditional expression.
α + β + γ = 100%
α = 10-40%
β = 10-40%
γ = 30-70%
Where α is the ratio [%] of the fiber orientation angle of the reinforcing fibers contained in the fiber reinforced composite material constituting the flange member [%], and β is the fiber reinforced composite material constituting the flange member. Of the reinforcing fibers contained in the fiber, the ratio [%] of the fiber orientation angle of 90 degrees and γ is the fiber orientation angle of the reinforcing fibers contained in the fiber reinforced composite material constituting the flange member. It is the ratio [%] of ± 45 degrees.   The vehicle energy absorbing member according to any one of claims 4 to 6, wherein the first base material and the second base material constituting the flange member are laminated in a pseudo-isotropic manner.   The vehicle energy absorbing member according to claim 1, wherein the load receiving member is deformable in a direction in which the load is applied when a load is applied.   The vehicle energy absorbing member according to claim 8, wherein the load receiving member is made of a metal material or a fiber reinforced composite material.   The energy absorbing member for a vehicle according to any one of claims 1 to 9, wherein an opening periphery of the through hole of the flange member is formed in a tapered shape, or a notch is formed in the opening periphery of the through hole.   The vehicle energy absorbing member according to any one of claims 1 to 10, wherein a part of the flange member is thicker than another part.   The energy absorbing member for a vehicle according to any one of claims 1 to 11, wherein the fiber reinforced composite material constituting the flange portion contains carbon fiber as a reinforcing material. A hinge member capable of rotating in the load application direction;
The vehicle energy absorbing member according to claim 1, wherein the flange member is attached to the vehicle via the hinge member. The door guard beam using the energy absorption member for vehicles in any one of Claims 1-13.

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