A step-by-step numerical procedure is employed to analyse the fatigue crack propagation of an initial sickle-shaped crack in a smooth round bar under cyclic tension or bending. The crack front is described by an elliptical arc during the whole fatigue life. The stress-intensity factor along the crack front is determined through a linear elastic finite element analysis for different values of crack aspect ratio and crack depth, and the fatigue crack growth is evaluated by applying the Paris-Erdogan law. The results are plotted in terms of stress-intensity factor range variations, crack paths, crack depth evolutions and crack shape evolutions. By varying the type of loading, a slight effect on the aspect ratio variation can be observed, whereas the influence on the crack depth evolution curves is remarkable.

Fatigue analysis of a round bar with a sickle-shaped crack / CARPINTERI, Andrea; BRIGHENTI, Roberto; VANTADORI, Sabrina. - (2007), pp. 1-10. (Intervento presentato al convegno XVIII CONVEGNO NAZIONALE AIMETA tenutosi a BRESCIA nel 11-14 SETT. 2007).

Fatigue analysis of a round bar with a sickle-shaped crack

BRIGHENTI, Roberto;
2007

Abstract

A step-by-step numerical procedure is employed to analyse the fatigue crack propagation of an initial sickle-shaped crack in a smooth round bar under cyclic tension or bending. The crack front is described by an elliptical arc during the whole fatigue life. The stress-intensity factor along the crack front is determined through a linear elastic finite element analysis for different values of crack aspect ratio and crack depth, and the fatigue crack growth is evaluated by applying the Paris-Erdogan law. The results are plotted in terms of stress-intensity factor range variations, crack paths, crack depth evolutions and crack shape evolutions. By varying the type of loading, a slight effect on the aspect ratio variation can be observed, whereas the influence on the crack depth evolution curves is remarkable.
2007
ATTI DEL XVIII CONVEGNO NAZIONALE AIMETA
XVIII CONVEGNO NAZIONALE AIMETA
BRESCIA
11-14 SETT. 2007
CARPINTERI, Andrea; BRIGHENTI, Roberto; VANTADORI, Sabrina
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/1328223
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