BASIC RESEARCH IN CRASHWORTHINESS II - LARGE DEFLECTION COMPUTERIZED ANALYSIS OF RATE SENSITIVE ELASTO-PLASTIC FRAME STRUCTURES

A general computerized study, including the effects of axial forces and material strain rate sensitivity on the dynamic plastic behavior, for collapsing plane frame structures involving large deflections is presented within the context of elementary beam theory. The nonlinear initial value problem is formulated through use of the matrix displacement method of rigid frame analysis, and a computational algorithm based on the Runge-Kutta step by step integration and linear interpolation techniques for finding a special event (plastic loading or unloading initiation) time is developed. A computer program, designated LDDAFS II, is developed for the special case of non-interaction between the axial force and bending moment at a beam cross section. Three example problems of which one is related to automobile crashworthiness of a special automobile front structure are presented.

• Corporate Authors:

  Calspan Corporation

  4455 Genesee Street
  Buffalo, NY  United States  14225
• Authors:
  • Shieh, R
• Publication Date: 1973-8

Media Info

• Pagination: 310 p.

Subject/Index Terms

• TRT Terms: Algorithms; Automobiles; Bending; Chassis; Computer programming; Computer programs; Deflection; Deformation; Design standards; Dynamic structural analysis; Motor vehicle bodies; Safety engineering; Strain (Mechanics); Stresses; Structural analysis
• Uncontrolled Terms: Structural properties
• Old TRIS Terms: Automobile bodies; Lddafs 2 computer program; Runge-kutta method; Strains
• Subject Areas: Design; Vehicles and Equipment;

Filing Info

• Accession Number: 00051498
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: CALSPAN-YB-2987-V-11Tech Rpt
• Contract Numbers: OT-FH-11-7622
• Files: NTIS
• Created Date: Feb 28 1974 12:00AM