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HomeKey Engineering MaterialsKey Engineering Materials Vol. 465Crack Tip Shielding from a Plastic ‘Inclusion’

Crack Tip Shielding from a Plastic ‘Inclusion’

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Abstract:

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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Materials Structure & Micromechanics of Fracture VI

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Periodical:

Key Engineering Materials (Volume 465)

Pages:

1-8

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.465.1

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Online since:

January 2011

Authors:

M. Neil James, C.J. Christopher, Yan Wei Lu, K.F. Tee, Eann A Patterson

Keywords:

Crack Shielding, Crack Tip Displacement, Crack Tip Stress, Digital Image Correlation (DIC), Muskhelishvili, Plastic Enclave, T-Stress

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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