✦ LIBER ✦

Influence of stress ratio on fatigue crack growth in mild steel

✍ Scribed by Raghuvir Kumar; Kamlesh Singh

Publisher: Elsevier Science
Year: 1995
Tongue: English
Weight: 356 KB
Volume: 50
Category: Article
ISSN: 0013-7944
DOI: 10.1016/0013-7944(95)91547-3

No coin nor oath required. For personal study only.

✦ Synopsis

Crack propagation experiments were performed on a mild steel side edge notched specimen for various load ranges and stress ratios at constant maximum loads. The life of the specimen increased as the load ratio increased. The crack growth data were analysed in terms of AKeff as a function of stress ratio R. Good results were determined for U = 0.7 + 0.15R(2 + R) in both cases. Two crack growth rate equations were also developed. --Fmax,] ~, 0"ma x U effective stress range ratio UTS ultimate tensile strength W width of the specimen O' ma x maximum stress of load cycle O' mi n minimum stress of load cycle a~ crack closing stress Crop crack opening stress ao ultimate stress.

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