TY  - EJOU
AU  - Toribio, J.  
AU  - Matos, J.C.  
AU  - González, B.  
AU  - Escuadra, J.  

TI  - An Automated Procedure for the Geometrical Modelling of a Surface Crack Front
T2  - Structural Durability \& Health Monitoring

PY  - 2009
VL  - 5
IS  - 1
SN  - 1930-2991

AB  - In this paper an automatic (analytical-numerical) procedure is proposed to model the front of a transverse surface crack located in the circular section of a lineal structural element (wire, cable, strand, rod, shaft,..., i.e., a cylindrical geometry) by means of a fitting ellipse, obtaining the ellipse parameters from a series of points in therealcrack front and adjusting them to thetheoreticalfitting ellipse by a least square method. For symmetric cracks two modelling procedures are formulated: (i) in the first one, a fitting ellipse is used wit its centre belonging to the periphery of the circular section of the cylinder; (ii) in the second one, a circle is used with no restrictions regarding the position of its centre. Both methods were compared and applied to real cracks in high-strength steel wires subjected to fatigue.
KW  - Semi-elliptical surface cracks
KW  -  round bars
KW  -  geometrical modelling
KW  -  crack fronts
KW  -  fatigue

DO  - 10.3970/sdhm.2009.005.057