WHEEL-SECURITY DEFECTS ON HEAVY COMMERCIAL VEHICLES

Wheel-fastening failures in British fleets of heavy trucks and buses doubled between 1975 and 1979, reaching an incidence estimated at 3 per cent a year. After introducing stringent maintenance procedures in 1979, the incidence is thought to have been reduced to 2 per cent. Any further improvement has to be a matter of engineering design, yet no accepted philosophy has been established on the subject and there is a shortage of fundamental information from which to predict performance. Work, both practical and theoretical, done so far at the Institute of Road Transport Engineers reveals that, especially with vehicles having top-rated axles and good braking and hill-climb performance, the commonly recommended clamping forces are insufficient to hold wheels firmly by frictional contact at the wheel faces. Furthermore, regular clamping torques do not strain wheel studs enough to retain adequate clamping force under influence of vibration and differential expansion of the clamped components when hot. A nationally funded empirical research programme is urged to confirm actual stress levels under dynamic conditions and to establish sound engineering guidelines. For the covering abstract of the conference see TRIS 392374. (Author/TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/058298524X
• Supplemental Notes:
  • Proceedings of the Conference Automobile Wheels and Tyres held at Penns Hall Hotel, Sutton Coldfield, England 18-19 October 1983.
• Corporate Authors:

  Mechanical Engineering Publications Limited

  P.O. Box 24, Northgate Avenue
  Bury St Edmunds, Suffolk IP32 6BW,   England 
• Authors:
  • DICKSON-SIMPSON, J
• Conference:
  • Proceedings of the Conference Automobile Wheels and Tyres held at Penns Hall Hotel, Sutton Coldfield, England 18-19 October 1983.
• Publication Date: 1983

Media Info

• Features: Figures; Tables;
• Pagination: p. 155-158

Subject/Index Terms

• TRT Terms: Buses; Clamps; Conferences; Defects; Design; Development; Direct current; Dynamics; Errors; Expansion; Failure; Fasteners; Fittings; Force; Friction; Guidelines; Heat; Heavy vehicles; Loads; Prevention; Research; Specifications; Stresses; Torque; Torsion; Trucks; Vibration; Wheels
• Uncontrolled Terms: Research and development
• Old TRIS Terms: Fitting (Piece)
• ITRD Terms: 1272: Bus; 8525: Conference; 3876: Coupling; 5238: Defect (tech); 5473: Dynamics; 6440: Error; 6720: Expansion; 5520: Failure; 5421: Force; 5452: Friction; 6743: Heat; 5567: Load; 1236: Lorry; 177: Specifications; 5575: Stress (in material); 5512: Torsion; 5558: Vibration; 1372: Wheel
• Subject Areas: Design; Highways; Motor Carriers; Public Transportation; Research; Security and Emergencies; Vehicles and Equipment; I91: Vehicle Design and Safety;

Filing Info

• Accession Number: 00392392
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• ISBN: 0-58298-524-X
• Files: ITRD, TRIS
• Created Date: May 31 1985 12:00AM