A DAMAGE FUNCTION AND ASSOCIATED FAILURE EQUATIONS FOR PREDICTING HOLD TIME AND FREQUENCY EFFECTS IN ELEVATED TEMPERATURE, LOW CYCLE FATIGUE

A new approach is developed for predicting strain- controlled, low cycle fatigue life at elevated temperature using a proposed energy measure of fatigue damage. This measure of damage, defined as the net tensile hysteretic energy of the fatigue cycle, can be approximated by the damage function. The damage function is applied to predicting effects of hold time and frequency, when time-dependent damage occurs, through failure relations incorporating a variation of Coffin's frequency modified approach. Failure equations are developed for two postulated categories of time-dependent damage.

• Corporate Authors:

  American Society for Testing and Materials (ASTM)

  100 Barr Harbor Drive, P.O. Box C700
  West Conshohocken, PA  United States  19428-2957
• Authors:
  • Ostergren, W J
• Publication Date: 1976-9

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 327-339
• Serial:
  • ASTM Journal of Testing and Evaluation
  • Volume: 4
  • Issue Number: 5
  • Publisher: Federal Highway Administration

Subject/Index Terms

• TRT Terms: Failure; Fatigue (Mechanics); Frequency (Electromagnetism); Loss and damage; Strain (Mechanics); Temperature; Time dependence
• Uncontrolled Terms: Fatigue life
• Old TRIS Terms: Strains
• Subject Areas: Geotechnology; Highways; Materials; Research;

Filing Info

• Accession Number: 00142197
• Record Type: Publication
• Report/Paper Numbers: Conf Paper
• Files: TRIS
• Created Date: Dec 15 1976 12:00AM