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ASTM E1049-85(2005)

Historical Reaffirmation

Standard Practices for Cycle Counting in Fatigue Analysis

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1.1 These practices are a compilation of acceptable procedures for cycle-counting methods employed in fatigue analysis. This standard does not intend to recommend a particular method.

1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


Cycle counting is used to summarize (often lengthy) irregular load-versus-time histories by providing the number of times cycles of various sizes occur. The definition of a cycle varies with the method of cycle counting. These practices cover the procedures used to obtain cycle counts by various methods, including level-crossing counting, peak counting, simple-range counting, range-pair counting, and rainflow counting. Cycle counts can be made for time histories of force, stress, strain, torque, acceleration, deflection, or other loading parameters of interest.

SDO ASTM: ASTM International
Document Number E1049
Publication Date June 1, 2005
Language en - English
Page Count 10
Revision Level 85(2005)
Supercedes
Committee E08.04
Publish Date Document Id Type View
Oct. 10, 1997 E1049-85R97 Revision
Nov. 1, 2023 E1049-85R23 Reaffirmation
June 1, 2017 E1049-85R17 Reaffirmation
Oct. 1, 2011 E1049-85R11E01 Reaffirmation
June 1, 2005 E1049-85R05 Reaffirmation