BASIC MECHANICS STUDY FOR COMPUTER EVALUATION OF AUTOMOBILE BARRIER SYSTEMS

A SUMMARY IS PRESENTED OF THE RESULTS OF THE BASIC MECHANICS STUDY PERFORMED IN CONJUCTION WITH THE DEVELOPMENT OF A GENERAL COMPUTER PROGRAM FOR THE ANALYSIS OF HIGHWAY PROTECTIVE SYSTEMS. THE REPORT BEGINS WITH A STUDY OF UNIAXIAL AND MULTIAXIAL CONSTITUTIVE EQUATIONS FOR STRAIN RATE INSENSITIVE AND STRAIN RATE SENSITIVE PLASTIC MATERIALS. THE CONSTITUTIVE THEORIES FOR DYNAMIC PLASTIC BEHAVIOR WHICH ARE INCLUDED HAVE BEEN DEVELOPED IN A WAY WHICH ALLOWS THEIR INCORPORATION INTO ANY NUMERICAL SOLUTION TECHNIQUE USING AN INCREMENTAL METHOD FOR INTEGRATION IN THE TIME DOMAIN. AN ATTEMPT HAS BEEN MADE TO INCLUDE THE DELAYED YIELD PHENOMENON INTO A DESIGN PROBLEM FOR DYNAMIC LOADINGS. A SERIES OF SOLUTIONS FOR STRAIN RATE INDEPENDENT SYSTEMS ARE PRESENTED. CLOSED FORM SOLUTIONS ARE FOUND FOR A NUMBER OF SPECIFIC EXAMPLES AND ESTIMATES OF THE VEHICLE DAMAGE ARE GIVEN. THE QUESTION OF HOW THE EQUATIONS SHOULD BE MODIFIED WHEN THE EFFECT OF AXIAL FORCES ON THE YIELD CONDITION IS INCLUDED AND AN APPROACH TO THIS CASE IS DEVELOPED. /AUTHOR/

  • Corporate Authors:

    University of California, Berkeley

    Berkeley, CA  USA  94720

    California Division of Highways

    Bridge Department
    Sacramento, CA  USA  05914

    Bureau of Public Roads /US

    400 7th Street, SW
    Washington, DC  USA  20590
  • Authors:
    • Kelly, J M
    • Tseng, W S
    • El-kasrawy, T
  • Publication Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 00203159
  • Record Type: Publication
  • Source Agency: Bureau of Public Roads /US
  • Report/Paper Numbers: Cpr-11-6059
  • Files: TRIS
  • Created Date: Sep 28 1970 12:00AM