An alternative method of decreasing ΔK FCGR testing

Sivaprasad, S and Tarafder, S and Tarafder, Mita and Ray, K K (2000) An alternative method of decreasing ΔK FCGR testing. International Journal of Fatigue, 22 (7). pp. 593-600.

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The conventional technique of decreasing ΔK FCGR testing often presents experimental difficulties in terms of the length of crack that must be accommodated and the time required to reach low values of ΔK. Addressing these issues, an alternative method of conducting such tests has been proposed. A relation according to which ΔK must be decreased has been derived assuming that the monotonic plastic zone size can be decreased at a constant rate with increase in crack length without adversely affecting the integrity of the FCGR data. Through experimental assessment of the alternative method and examination of crack closure effects, such an asumption has been vindicated. It has been shown that this method is particularly suitable for high strength materials and that it provides great advantages when conducting FCGR tests at low frequencies. The employment of the method for obtaining threshold regime corrosion fatigue crack growth data has been demonstrated for HSLA steels.

Item Type:Article
Official URL/DOI:
Uncontrolled Keywords:Fatigue test methods; Corrosion fatigue; HSLA steels
Divisions:Material Science and Technology
ID Code:359
Deposited On:07 Dec 2009 18:15
Last Modified:09 Feb 2012 16:52
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