Effective method for fatigue crack arrest in structural steels based on artificial creation of crack closure effect (original) (raw)

Abstract

Novel method of fatigue crack growth arrest in structural steels based on artificial creation of crack closure effect is proposed. Special liquid technological environment is used which, falling into a crack cavity and interacting with crack surface metal, forms solid products there, which prevents crack surfaces contact during a period of unloading. This leads to crack arrest in a wide range of stress intensity factor ΔK. Crack growth retardation effect enhances with an increase of the active component concentration in a solution. Some technological aspects for practical application of the proposed method are considered.

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