TORSIONAL DESIGN ASPECTS OF LONG WHEELBASE VEHICLES

Torsional stiffness - does it need to be high or low? What is the effect of suspension roll stiffness? What is the best way of distributing torsion resisting structure? These are some of the questions in the mind of the designer of the vehicle chassis, and this paper examines some of the aspects of designing for torsion. Four types of torsional loading are identified, covering asymmetrically distributed load, ground plane twist, lateral acceleration due to cornering, turning loads and dynamic response from ground plane ripple. Two simplified chassis models are considered - the 'backbone', consisting of one or more torsionally resistant longitudinal members; the peripheral frame, in which the two torsionally flexible longitudinal members are connected at their ends by torsionally resistant members; and the ladder frame, in which the longitudinals are connected by many cross-members. The effect of varying the cross-sectional shape, size and disposition of the torsionally resistant members is examined from the point of view of minimising weight while maintaining a satisfactory stress level. The analyses use both simple structural theory and computer analysis for the more complex structures. /Author/ /TRRL/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0853346429
• Supplemental Notes:
  • Papers presented at the Annual Conference of the Stress Analysis Group of the Institute of Physics held at the University of Ashton, Birmingham, England.
• Corporate Authors:

  Applied Science Publishers Limited

  22 Rippleside Commercial Estate, Ripple Road
  Barking, Essex,   England 

  John Wiley & Sons, Incorporated

  111 River Street
  Hoboken, NJ  United States  07030-6000
• Authors:
  • Sharman, P W
  • Gibbs, H G
  • Richards, T H
• Conference:
  • Papers presented at the Annual Conference of the Stress Analysis Group of the Institute of Physics held at the University of Ashton, Birmingham, England.
• Publication Date: 1975

Language

• English

Media Info

• Features: Figures; References;
• Pagination: p. 123-148

Subject/Index Terms

• TRT Terms: Chassis; Computers; Conferences; Design; Heavy vehicles; Loads; Mathematical models; Stiffness; Structural analysis; Suspension systems; Torsion; Trucks; Vehicle design; Wheel base
• Uncontrolled Terms: Distributed loading; Models
• ITRD Terms: 1353: Chassis; 8525: Conference; 9011: Design (overall design); 8673: Digital computer; 5597: Distributed loading; 1078: Lock (waterway); 6205: Model (not math); 5931: Stiffness; 5573: Stress analysis; 1329: Suspension (veh); 5512: Torsion
• Subject Areas: Design; Highways; Motor Carriers; Safety and Human Factors; Vehicles and Equipment; I91: Vehicle Design and Safety;

Filing Info

• Accession Number: 00137796
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• ISBN: 0853346429
• Report/Paper Numbers: Proceeding
• Files: ITRD, TRIS
• Created Date: Apr 27 1977 12:00AM