Fracture behavior of cracks in ductile plates under monotonic mixed-mode loading

 
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Fracture behavior of cracks in ductile plates under monotonic mixed-mode loading (EN)

Kytopoulos, V (EN)
Theocaris, PS (EN)

N/A (EN)

An experimental study of the early stages of ductile fracture was undertaken by using scanning electromicroscopy (SEM). The variation of several parameters influencing this type of fracture was introduced during the study of the preliminary blunting phase followed by the creation of the damaged ligament in front of the crack which resulted in the initiation of the slow propagation phase. This was achieved by changing the angle of obliqueness, α, of the edge cracks made in thin or thick plates of polycarbonate which exemplified cases where predominantly plane stress or plane strain conditions prevailed. The change of the angle α influenced drastically the value of the mixed-mode factor μ = K11/K1. The parameters studied were the crack-tip opening angle (CTOA), the damaged ligament in front of the crack face, the direction and orientation of the subsequent crack initiation and propagation and finally the variation of crack propagation and velocity at the early stage of slow crack propagation. Important results were derived from this experimental study which clarified various aspects of ductile fracture during the initiation of a new step of propagation of the crack. © 1991 Kluwer Academic Publishers. (EN)

journalArticle

Ductile Fracture (EN)
Microscopic Examination - Scanning Electron Microscopy (EN)
Crack Tips (EN)
Crack Propagation (EN)
Fracture Mechanics (EN)
Crack Tip Opening Angle (EN)
Materials Testing - Fracture (EN)
Experimental Study (EN)
Mixed Mode Loading (EN)
Crack Initiation (EN)
Plates (EN)
Mixed Mode (EN)

Εθνικό Μετσόβιο Πολυτεχνείο (EL)
National Technical University of Athens (EN)

International Journal of Fracture (EN)

Αγγλική γλώσσα

1991


Kluwer Academic Publishers (EN)



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