OBLIQUE IMPACT ON RIGID-PLASTIC BEAM-SUPPORT SYSTEM

THE OBLIQUE IMPACT IS ANALYZED OF A MOVING DEFORMABLE MASS ON A BEAM LATERALLY SUPPORTED BY SOME KIND OF ENERGY ABSORBING MATERIAL. THE PROBLEM IS CONSIDERED TO BE A MODEL OF THE COLLISION OF AN AUTOMOBILE WITH A HIGHWAY PROTECTIVE SYSTEM. THE PROBLEM IS IDEALIZED BY ASSUMING THE BEAM TO BE RIGID-PERFECTLY PLASTIC AND BACKED BY A RIGID-PERFECTLY PLASTIC SUPPORT MATERIAL. THE IMPACTING MASS IS TAKEN AS RIGID-PERFECTLY PLASTIC IN THAT IT CAN SUSTAIN ONLY A LIMITED FORCE IN CONTACT WITH THE BARRIER. THE SOLUTION INCLUDES THE DETERMINATION OF THE CONTACT FORCE BETWEEN MASS AND BARRIER AND INCLUDES VARIABLE MASS VELOCITY PARALLEL TO THE BARRIER AND ALSO INCLUDES CONVECTIVE TERMS WHICH ARISE OUT OF THE RATE OF CHANGE OF SLOPE OF THE BEAM AT THE POINT OF CONTACT OF BEAM AND MASS. INCLUSION OF THIS TERM ALLOWS THE DETERMINATION OF THE SPEED AND ANGLE OF THE VEHICLE AS IT LEAVES THE DEFORMED BARRIER. /AUTHOR/

• Supplemental Notes:
  • Adm, Cpr 11-6059
• Corporate Authors:

  University of California, Berkeley

  Berkeley, CA  United States  94720

  Bureau of Public Roads /US

  400 7th Street, SW
  Washington, DC  United States  20590
• Authors:
  • Kelly, J M
  • Tseng, W
• Publication Date: 1968-5

Subject/Index Terms

• TRT Terms: Angle of incidence; Automobiles; Barriers (Roads); Beams; Crashes; Energy absorption; Impacts; Mathematical analysis; Plasticity; Stiffness; Velocity
• Uncontrolled Terms: Barriers; Rigid
• Old TRIS Terms: Obliquity angle
• Subject Areas: Bridges and other structures; Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00207874
• Record Type: Publication
• Source Agency: Bureau of Public Roads /US
• Files: TRIS
• Created Date: Aug 19 1994 12:00AM