| 摘要 |
PROBLEM TO BE SOLVED: To provide a composite structural material capable of constituting a vehicle body frame making absorbing characteristics of impact energy and lightening compatible with each other. SOLUTION: Sudden lowering of bending stress of a beam member is restrained by compression stress of a cylindrical body by providing the cylindrical body 12 for reinforcement an axis of which is extended in a direction where a bending load is applied between opposed inner surfaces of side walls 13, 14 of the beam member (side sill 6) making a hollow closed cross-section made of a light metal material. COPYRIGHT: (C)2007,JPO&INPIT
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