THE USE OF DYNAMIC STRAIN RECORDS TO ESTIMATE THE FATIGUE LIFE OF A SEMI-TRAILER CHASSIS

The paper describes an experiment in which the strain was recorded at critical points on the chassis of a 16 ton gvw semi-trailer, operating on various road surfaces. Vertical acceleration was also recorded in the region of the suspension. Statistical analysis of the records in terms of design factors and load spectra is then used to determine suitable maximum stress levels for the maximum static load and then to estimate the fatigue life. Since many chassis are of welded steel construction, the s-n curves used are appropriate to the class of joint. Miner's law is used to estimate the cumulative effect of the various load spectra. The final section draws some general conclusions on the effect of increasing static stress levels on the fatigue life, and describes methods of weight reduction in the chasis while maintaining an adequate fatigue life. /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

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• 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; Tables;
• Pagination: p. 461-471

Subject/Index Terms

• TRT Terms: Chassis; Conferences; Dynamic loads; Heavy vehicles; Loads; Mathematical analysis; Mechanical fatigue; Structural analysis; Surfaces; Suspension systems; Texture; Tractor trailer combinations; Trailers; Vehicle design
• Uncontrolled Terms: Fatigue life
• Old TRIS Terms: Strippers
• ITRD Terms: 1058: Air space; 6471: Analysis (math); 1353: Chassis; 8525: Conference; 5579: Fatigue (mater); 5567: Load; 1078: Lock (waterway); 5573: Stress analysis; 6438: Surface; 3053: Surface texture; 1329: Suspension (veh)
• Subject Areas: Design; Highways; Motor Carriers; Safety and Human Factors; Vehicles and Equipment; I91: Vehicle Design and Safety;

Filing Info

• Accession Number: 00137805
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• ISBN: 0 85334 642 9
• Report/Paper Numbers: Proceeding
• Files: ITRD, TRIS
• Created Date: Apr 27 1977 12:00AM