Crack Tip Shielding from a Plastic ‘Inclusion’

Abstract:

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This paper presents a very brief overview of the philosophy underlying a plastic inclusion approach to defining the boundary stresses imposed on the applied elastic stress or displacement field by the plastic deformation attendant on crack growth in a ductile material. It leads to two new fracture mechanics parameters, KR and KS. KR defines a retardation component arising from wake contact and the Poisson’s contraction associated with the plastic zone, whilst KS describes a compatibility-induced component arising from shear at the elastic-plastic interface. These additional components imply that KF is not directly comparable with KI, as it describes the net driving force on the crack from the applied load.

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Periodical:

Edited by:

Pavel Šandera

Pages:

1-8

DOI:

10.4028/www.scientific.net/KEM.465.1

Citation:

M. N. James et al., "Crack Tip Shielding from a Plastic ‘Inclusion’", Key Engineering Materials, Vol. 465, pp. 1-8, 2011

Online since:

January 2011

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$35.00

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