LARGE DISPLACEMENT, NONLINEAR STATIC AND DYNAMIC ANALYSIS OF AUTOMOBILE SHEET METAL STRUCTURE

A technique was developed to analyze the large deflection and rotation phenomenon of automobile bodies in a crash environment. No restrictions are made on the magnitudes of rotations; the deformation, however, is considered to be small in each element. The two time integration procedures, explicit and implicit, yield equivalent results for dynamic problems. Use of the implicit procedure with large time step allows quasistatic type analyses. This is of particular importance when trying to reproduce full-scaled "static" crush tests analytically. However, for impulsive type loads, path-dependent materials such as some elastoplastic materials and structures with high frequency content, where small time step is required the explicit scheme is much more suitable since it generally requires fewer computations for a given step.

• Supplemental Notes:
  • Presented at the SAE Congress and Exposition, Detroit, 27 February-3 March 1978.
• Corporate Authors:

  Society of Automotive Engineers (SAE)

  400 Commonwealth Drive
  Warrendale, PA  United States  15096
• Authors:
  • Yeung, K S
  • Hollowell, T
• Publication Date: 1978-3

Media Info

• Features: References;
• Pagination: 24 p.

Subject/Index Terms

• TRT Terms: Automobiles; Crashworthiness; Deflection; Dislocation (Geology); Dynamic loads; Dynamics; Integrated systems; Mathematical methods; Motor vehicle bodies; Nonlinear systems; Rotation; Safety factors; Sheet metal; Statics; Structural analysis; Traffic crashes
• Uncontrolled Terms: Dynamic characteristics; Dynamic response; Integration; Nonlinearity
• Old TRIS Terms: Automobile bodies; Sheet and strip metal; Static conditions
• Subject Areas: Highways; Safety and Human Factors;

Filing Info

• Accession Number: 00178838
• Record Type: Publication
• Source Agency: Engineering Index
• Report/Paper Numbers: SAE 780367 Preprint, HS-025 448U
• Files: HSL, TRIS
• Created Date: Sep 27 1985 12:00AM