Investigation by scanning electron microscope of the effect of geometry and loading mode on blunting of copper sheets

 
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Investigation by scanning electron microscope of the effect of geometry and loading mode on blunting of copper sheets (EN)

Kytopoulos, VN (EN)
Theocaris, PS (EN)

N/A (EN)

Ductile blunting and fracture under conditions of plane stress in metals are described by two main phases: static crack growth, and slow crack propagation. In the first phase the crack tip is deformed in an elastic-plastic mode, the main characteristics of which are the formation of the plastic enclave around the crack tip, and the evolution of blunting. In the second phase the crack propagates through expansion and coalescence of microvoids and microdefects developed at the vicinity of and in front of the crack tip. Ductile blunting under plane-stress conditions in metallic plates was studied, and the influence of the geometry and the mode of loading specimens was defined. This was achieved by interrelating the amount of crack opening displacement at its tip, and its comparable effect of the crack tip advance displacement. The experimental study was executed in a scanning electron microscope with thin specimens under dominating plane-stress conditions. The mechanism of development of ductile blunting up to the point of initiation of slow crack propagation was interrelated with these characteristic quantities. © 1992 Chapman & Hall. (EN)

journalArticle

Crack Opening Displacement (EN)
Crack Growth (EN)
Crack Propagation (EN)
CRACK TIP (EN)
Scanning Electron Microscope (EN)
OPENING DISPLACEMENT (EN)
Experimental Study (EN)
Copper (EN)
STRESS (EN)

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

Journal of Materials Science (EN)

1992


Kluwer Academic Publishers (EN)



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