Crash attenuation system

F - Mech Eng,Light,Heat,Weapons – 16 – F

Patent

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F16F 7/12 (2006.01) E01F 15/00 (2006.01)

Patent

CA 2372589

A crash attenuation system having an impact head (50), and energy absorption mechanism (12, 14, 16) is disclosed. The energy absorbing mechanism (12, 14, 16) has a mandrel (12) for rupturing thin-walled tubes (14) in a controlled rupture to absorb impact forces from a colliding vehicle. A frame (50) may be used to mount the system to a truck, trailer, guardrail, median barrier end treatment, or a crash cushion. Stress concentrators (16, 18) may be incorporated into the tubes (14) and the mandrels (12) to selectively control rupturing and energy dissipation.

Cette invention concerne un système atténuateur d'écrasement, qui possède une tête d'impact (50), et un mécanisme d'absorption d'énergie (12, 14, 16). Ce mécanisme absorbant l'énergie (12, 14, 16) possède un mandrin (12) permettant la rupture de tubes à parois fines (14) dans le cadre d'une rupture maîtrisée de façon à absorber les forces d'impact provoquées par la collision d'un véhicule. On peut utiliser un cadre (50) pour monter ce système sur un camion, une glissière de sécurité, un équipement d'extrémité de barrière médiane ou un amortisseur d'impact. On peut incorporer des concentreurs de contraintes (16, 18) dans les tubes et les mandrins (12) de façon à maîtriser sélectivement la rupture et la dissipation d'énergie.

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