REUSABLE HIGH-MOLECULAR-WEIGHT, HIGH-DENSITY POLYETHYLENE CRASH CUSHIONS FOR WIDE HAZARDS

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.

Language

  • English

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: p. 1-7
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00781502
  • Record Type: Publication
  • ISBN: 0309071208
  • Files: TRIS, TRB, ATRI
  • Created Date: Jan 19 2000 12:00AM