| Title |
Development of an Energy-Absorbing Device for a Crashworthy Sliding Post |
| Authors |
노민형(Noh, Min-Hyung) ; 장대영(Jang, Dae-Young) ; 이성수(Lee, Sung-Soo) ; 한기장(Han, Ki-Jang) |
| DOI |
https://doi.org/10.12652/Ksce.2020.40.5.0445 |
| Keywords |
슬라이딩 지주;감충(堪衝)성능;충돌해석;충돌실험 Sliding post;Crashworthiness;Energy-absorbing pipe;LS-DYNA;Impact simulation;Crash test |
| Abstract |
Non-breakaway crashworthy sliding posts move rigidly with a vehicle in the early stage of vehicle impact. During this stage, a vehicle imparts its linear momentum to the post, experiencing first-stage speed loss followed by second-stage loss from the crush of the energy-absorbing pipe (EAP) installed under the guide rail. An EAP is the key element of a crashworthy sliding post and should be confined to the post foundation. This paper covers the development of an EAP for a sliding post of 507 kg, which is a sliding post type frequently used in Korea for cantilever signs. Detailed explanations of the designs for an EAP structure using LS-DYNA impact simulation are given, and the crashworthiness of the systems are confirmed through crash tests. The EAP presented in this paper can accommodate impacts from 0.9 ton-60 km/h to 1.3 ton-80 km/h, and is applicable to foundations up to 2.7 m in length. |