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公开(公告)号：EP3546786A1
公开(公告)日：2019-10-02
申请号：EP18867355.2
申请日：2018-10-17
摘要： Provided is an energy absorption member in which the recoil at the moment of receiving an impact is small, and fracture by impact propagates uniformly enabling stable absorption of the impact. 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 ≤ S 2 × M 1 / 8 / E 1 / 2 ≤ 22.0
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公开(公告)号：EP3888897A1
公开(公告)日：2021-10-06
申请号：EP19926462.3
申请日：2019-11-11
IPC分类号： B29K105/08 , B29L31/30 , B29C70/06 , B29C70/32
摘要： Provided is a fiber-reinforced resin hollow cylindrical body that is highly resistant to torsion and also comprises impact energy absorbency enabling the cylindrical body to be used in an energy absorbing member such as a crush box. The fiber-reinforced resin hollow cylindrical body is composed of a reinforcing fiber yarn and a resin composition with which the reinforcing fiber yarn is impregnated. The fiber diameter D of the reinforcing fiber yarn is in the range of 10.0 to 18.0 µm, the weight T of the reinforcing fiber yarn is in the range of 100 to 1500 tex, the volume content V of the reinforcing fiber yarn in the fiber-reinforced resin hollow cylindrical body is in the range of 40.0 to 80.0%, the D, T and V satisfy the following formula (1): 0.090 ≤ T 1 / 4 × V / D 3 ≤ 0.155
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