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A fatigue crack propagation model for strain hardening materials

โœ Scribed by K.M. Lal; S.B.L. Garg

Publisher
Elsevier Science
Year
1977
Tongue
English
Weight
782 KB
Volume
9
Category
Article
ISSN
0013-7944

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โœฆ Synopsis

Abmtmct-In this paper a crack propagation model based on Tomkins concept (df/dN = Ae,, . o) has been developed using the theoretically developed cyclic plastic xone sixes. The crack propagation rates are found to be functions of stress intensity factor, Elber's efTective stress range ratio, cyclic yield strength of material, crack length, specimen width and cyclic strain hardening exponent. Suitably grouped to give the crack growth rate in terms of five constants termed as Loading Constant, Material constant, Crack size constant, specimen Width Constant and Stress Intensity Exponent. The crack growth rates fonnd by theory are compared with the experimental results available in literature and a good agreement is found.

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