A REVIEW OF THE FATIGUE PROPERTIES OF SPOT-WELDED SHEET STEELS

Over the past several years, the automotive industry has used increasing amounts of high-strength sheet steels to reduce vehicle weight for improved fuel economy. It is important that these high strength steels exhibit spot-weld fatigue characteristics at least equal to those of previous lower strength low-carbon steels. This study reviews the spot-weld fatique performance of uncoated sheet steels with respect to material strength, spot-weld diameter, sheet thickness, and the number and array of spot welds. Models used to describe the state of stress around the spot weld are also reviewed. Selected results contained in the literature are reevaluated using fracture-mechanics concepts. Comments are given regarding fatigue-crack growth in spot welds with respect to the cyclic-stress ratio and threshold-fatigue limit. Limitations of current theories used to evaluate fatigue performance of spot welds are discussed, and an alternative approach to interpreting such data is recommended.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/01487191
• Supplemental Notes:
  • International Congress and Exposition, Detroit, Michigan, February 28-March 4, 1983.
• Corporate Authors:

  Society of Automotive Engineers (SAE)

  400 Commonwealth Drive
  Warrendale, PA  United States  15096
• Authors:
  • Davidson, J A
• Publication Date: 1983

Media Info

• Features: Figures; References; Tables;
• Pagination: 13 p.
• Serial:
  • SAE Technical Paper
  • Publisher: Society of Automotive Engineers (SAE)
  • ISSN: 0148-7191
  • EISSN: 2688-3627
  • Serial URL: http://papers.sae.org/

Subject/Index Terms

• TRT Terms: Fatigue (Mechanics); High schools; Joints; Sheet metal; Spot welding; Welds
• Uncontrolled Terms: Welded joints
• Subject Areas: Safety and Human Factors;

Filing Info

• Accession Number: 00377446
• Record Type: Publication
• Source Agency: National Highway Traffic Safety Administration
• Report/Paper Numbers: SAE 830033, HS-034 601
• Files: HSL, USDOT
• Created Date: Sep 30 1983 12:00AM