N. Ramakrishnan1, P. Rama Rao2
CMC-Computers, Materials & Continua, Vol.2, No.3, pp. 163-176, 2005, DOI:10.3970/cmc.2005.002.163
Abstract Ductile fracture is initiated by void nucleation at a characteristic distance (Ic) from the crack tip and propagated by void growth followed by coalescence with the tip. The earlier concepts expressed Ic in terms of grain size or inter-particle distance because grain and particle boundaries form potential sites for void nucleation. However, Srinivas et al. (1994) observed nucleation of such voids even inside the crack tip grains in a nominally particle free Armco iron. In an attempt to achieve a unified understanding of these observations, typical crack-tip blunting prior to ductile fracture in a standard C(T) specimen (Mode I) was… More >
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