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Scope

1.1 This practice pertains only to S-N and e-N relationships that may be reasonably approximated by a straight line (on appropriate coordinates) for a specific interval of stress or strain. It presents elementary procedures that presently reflect good practice in modeling and analysis. However, because the actual S-N or e-N relationship is approximated by a straight line only within a specific interval of stress or strain, and because the actual fatigue life distribution is unknown, it is not recommended that (a) the S-N or e-N curve be extrapolated outside the interval of testing, or (b) the fatigue life at a specific stress or strain amplitude be estimated below approximately the fifth percentile (P [similar] 0.05). As alternative fatigue models and statistical analyses are continually being developed, later revisions of this practice may subsequently present analyses that permit more complete interpretation of S-N and e-N data.

Keywords

Engineering applications; Fatigue; Linear/linearized stress-/strain-life; Models/modeling; Statistical methods; Strain testing-metallic materials; Stress-metallic materials; Stress-stress strain; statistical analysis of linear/linearized stress-life (S-N)/strain-life; (; ICS Number Code 19.060 (Mechanical testing)

To find similar documents by ASTM Volume:

03.01 (Metals -- Mechanical Testing; Elevated and Low-Temperature Tests; Metallography)

To find similar documents by classification:

19.060 (Mechanical testing Including testing equipment Mechanical testing of metals, see 77.040.10)

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