Aditya Khanna, James Vidler, James Hughes, Ching Tai Ng, Andrei Kotousov
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引用次数: 0
Abstract
Based on the strip yield model for propagating cracks, the current paper proposes a new method for the evaluation of crack tip opening loads. It is based on the theoretical analysis of shapes of the compliance offset curves for various applied stress levels and R ratios, which indicates that the inflection point of the curve is a good approximation of the initiation of the crack tip opening. The method avoids uncertainties and drawbacks associated with the selection of empirical thresholds or criteria to identify the value of the opening load, which is often utilized to calculate the effective stress intensity factor range or fatigue crack driving force. Careful experimental studies also confirm the ability of this proposed method to negate the R ratio effect on fatigue crack growth rates for a wide range of loading conditions.
期刊介绍：
Fatigue & Fracture of Engineering Materials & Structures (FFEMS) encompasses the broad topic of structural integrity which is founded on the mechanics of fatigue and fracture, and is concerned with the reliability and effectiveness of various materials and structural components of any scale or geometry. The editors publish original contributions that will stimulate the intellectual innovation that generates elegant, effective and economic engineering designs. The journal is interdisciplinary and includes papers from scientists and engineers in the fields of materials science, mechanics, physics, chemistry, etc.
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