SIMPLIFIED DYNAMIC ANALYSIS OF RIGID-PLASTIC BEAMS

A new analytical procedure is developed to predict the dynamic response of axially restrained beams to intense pulse loads. The beams are assumed to have doubly symmetric cross-sections and to obey a rigid-plastic material law. The moment-axial force interaction relation for the beam section is approximated by a straight line. This uncouples the response into two distinct phases -an initial bending-only phase involving plastic hinge mechanisms, followed by a plastic string phase. Both these phases are governed by linear differential equations, and hence the response to arbitrary load pulses may be solved in closed form. The results for beams subjected to a rectangular load pulse compare very well with those from more exact solutions. Finally, results are presented for an arbitrary cross-section beam subjected to a triangular shaped pulse with a finite rise time. The effect of rise time is found to be very small for rise times less than 0.3 of the total pulse length. (a)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/0734743X
• Corporate Authors:

  Pergamon Press, Incorporated

  Headington Hill Hall
  Oxford OX30BW,    
• Authors:
  • Schubak, R B
  • Anderson, D L
  • Olson, M D
• Publication Date: 1989

Language

• English

Media Info

• Pagination: p. 27-42
• Serial:
  • International Journal of Impact Engineering
  • Volume: 8
  • Issue Number: 1
  • Publisher: Elsevier
  • ISSN: 0734-743X
  • Serial URL: https://www.sciencedirect.com/journal/international-journal-of-impact-engineering

Subject/Index Terms

• TRT Terms: Beams; Crashes; Dynamics; Impacts; Loads; Mathematical analysis; Mathematical models; Motor vehicle bodies; Plasticity; Vehicles
• ITRD Terms: 6471: Analysis (math); 3472: Beam; 1356: Body (car); 1631: Collision; 5473: Dynamics; 5567: Load; 6473: Mathematical model; 5922: Plasticity; 5471: Shock; 1255: Vehicle
• Subject Areas: Vehicles and Equipment;

Filing Info

• Accession Number: 00492952
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: May 31 1990 12:00AM