An Improved Wheeler Model for Remaining Life Prediction of Cracked Plate Panels Under Tensile-Compressive Overloading

This paper presents an improved Wheeler residual stress model for remaining life prediction of the cracked structural components under variable amplitude loading. The improvement to the Wheeler residual stress model is in two folds. One is expressions for the shaping exponent, which are generally obtained through experiments. Another is calculation of effective plastic zone size to incorporate the sequent effects under tensile-compressive overloading. The remaining life prediction has been carried out by employing the linear elastic fracture mechanics (LEFM) principles. Studies on remaining life prediction of cracked plate panels subjected to tensile-compressive overloading have been carried out for validating the improved Wheeler model. It is observed from the studies that the predicted remaining life using the improved Wheeler model for these cracked plates are found to be in close agreement with the corresponding experimental values reported in the literature. keyword: Fracture mechanics, crack growth model, fatigue loading, remaining life

[1]  C. M. Hudson.  A Root-Mean-Square Approach for Predicting Fatigue Crack Growth under Random Loading , 1981 .

[2]  Yoshiharu Mutoh,et al.  On the number of overload-induced delay cycles as a function of thickness , 2004 .

[3]  B. C. Sheu,et al.  Shaping exponent in wheeler model under a single overload , 1995 .

[4]  R Arone.  Application of Wheeler retardation model for assessment of fatigue crack lifetime under random overloads , 1990 .

[5]  Nagesh R. Iyer,et al.  An Improved Wheeler Residual Stress Model For Remaining Life Assessment of Cracked Plate Panels , 2004 .

[6]  George A. Kardomateas,et al.  Effects of compressive load excursions on fatigue crack growth , 1994 .

[7]  Nagesh R. Iyer,et al.  State-of-the-art review on fatigue crack growth analysis under variable amplitude loading , 2004 .

[8]  F. A. Darwish,et al.  Effect of single and multiple overloading on the residual fatigue life of a structural steel , 2003 .

[9]  Farid Taheri,et al.  Experimental and analytical investigation of fatigue characteristics of 350WT steel under constant and variable amplitude loadings , 2003 .

[10]  Jm Barsom.  Fatigue Crack Growth Under Variable-Amplitude Loading in Various Bridge Steels , 1976 .

[11]  W. Elber.  The Significance of Fatigue Crack Closure , 1971 .

[12]  D. Broek.  The practical use of fracture mechanics , 1988 .

[13]  J. Schijve.  Fatigue Crack Growth under Variable Amplitude Loading , 1974 .

[14]  Jung-Kyu Kim,et al.  A statistical approach for predicting the crack retardation due to a single tensile overload , 2003 .

[15]  H. Nowack,et al.  The influence of compression loads and of dk/da on the crack propagation under variable amplitude loading , 1984 .

[16]  J. Newman.  Prediction of Crack Growth under Variable-Amplitude Loading in Thin-Sheet 2024-T3 Aluminum Alloys , 1997 .

[17]  O. E. Wheeler.  Spectrum Loading and Crack Growth , 1972 .

[18]  S Dawicke David.  Overload and Underload Effects on the Fatigue Crack Growth Behavior of the 2024-T3 Aluminum Alloy , 1997 .

[19]  Farid Taheri,et al.  Prediction of crack growth in 350WT steel subjected to constant amplitude with over- and under-loads using a modified wheeler approach , 2003 .

[20]  Andrea Carpinteri,et al.  Handbook of fatigue crack propagation in metallic structures , 1994 .

[21]  Td Gray,et al.  Predicting Fatigue Crack Retardation Following a Single Overload Using a Modified Wheeler Model , 1976 .