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REUSABLE HIGH-MOLECULAR-WEIGHT, HIGH-DENSITY POLYETHYLENE CRASH CUSHIONS FOR WIDE HAZARDS.
| 题名： | REUSABLE HIGH-MOLECULAR-WEIGHT, HIGH-DENSITY POLYETHYLENE CRASH CUSHIONS FOR WIDE HAZARDS. |
| 作者： | Carney-JF-III; Alberson-DC; Bullard-DL Jr.; Chatterjee-S; Menges-W |
| 关键词： | CRASH-CUSHIONS; DISSIPATION-; ETHYLENE-RESINS; FINITE-ELEMENT-METHOD; HAZARDS-; IMPACT-TESTS; MAINTENANCE-FREE; MATHEMATICAL-MODELS; NCHRP-REPORT-350; POLYETHYLENE-CYLINDERS; REUSABLE-CRASH-CUSHIONS; SELF-RESTORATIVE-CRASH-CUSHIONS; THERMOPLASTIC-MATERIALS; WIDE-HAZARDS |
| 摘要： | The development and full-scale crash testing of a new, reusable, and essentially maintenance-free crash cushion designed to shield wide hazards are described. The energy-dissipating medium in this device is composed of high-molecular-weight, high-density polyethylene cylinders. This "smart" energy-dissipating thermoplastic is the same material used in the REACT family of narrow-hazard crash cushions and truck-mounted attenuators. It is self-restorative and reusable and possesses excellent energy-dissipation properties. The design process incorporated the results of impact testing with individual polyethylene cylinders, finite-element modeling, and a comprehensive full-scale crash testing program conducted in accordance with the guidelines of National Cooperative Highway Research Program (NCHRP) Report 350. It is demonstrated that finite-element modeling is a cost-effective tool whose use can minimize the number of costly full-scale crash tests required to develop an effective impact attenuation device. This new, reusable, wide-hazard crash cushion satisfies all of the requirements of NCHRP Report 350 and has been accepted by the Federal Highway Administration for use in the National Highway System. |
| 总页数： | Transportation Research Record. 1999. (1690) pp1-7 (15 Phot., 1 Fig., 2 Tab., 6 Ref.) |
| 报告类型： | 科技报告 |
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