ASTM E 647 - 13a Standard Test Method for Measurement of Fatigue Crack Growth Rates

American Society for Testing and Materials (ASTM). Current edition approved Oct. 15, 2013. Published February 2014. Originally approved in 1978. Last previous approved in 2013 as E647 – 13. 50 p. This test method covers the determination of fatigue crack growth rates from near-threshold to Kmax controlled instability. Results are expressed in terms of the crack-tip stress-intensity factor range (ΔK), defined by the theory of linear elasticity.