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US 11,739,807 B2Granted
Energy absorption member
AssigneeNitto Boseki Co., Ltd.
InventorsShunsuke Harashima, Kazunori Sano, Norio Hirayama, Kazuhiro Sakata
Life of this patent
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Abstract
An energy absorption member (21) includes a hollow cylindrical fiber-reinforced composite material including reinforcement fibers (22), in which tensile strength S (GPa), tensile modulus of elasticity M (GPa), and elongation rate E (%) satisfy the following expression (1), and a curable resin composition with which the reinforcement fibers (22) are impregnated. The volume content of the reinforcement fibers (22) in the fiber-reinforced composite material is 30 to 80%. 11.0≤S2×M1/8/E1/2≤22.0 (1)
Claims14
An energy absorption member comprising:
- a hollow cylindrical body formed of a fiber-reinforced composite material composed of:
- a plurality of reinforcing fibers which are exclusively glass fibers, in which tensile strength S (GPa), tensile modulus of elasticity M (GPa), and elongation rate E (%) satisfy the following expression (1), and
- a curable resin composition with which the glass fibers are impregnated;
- wherein said cylindrical body is a crushable component of a part that is configured to be crushed in a collision and to absorb collision energy generated by an impact during the collision,
- wherein the reinforcing fibers are arranged inside of the cylindrical body in a manner such that in the event of said collision, a fracture, generated by the impact, propagates substantially uniformly through said energy absorption member,
- wherein a volume content of the glass fibers in the fiber-reinforced composite material is 30 to 80%, and wherein the glass fibers have a diameter in a range of 11 to 30 μm
- 11.0≤S2×M1/8/E1/2≤22.0 (1).
4 more elements
Dependencies are inferred from the claim text.