Nonlinear mode III crack stress fields for materials obeying a modified Ramberg‐Osgood law |
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Authors: | M. Zappalorto L. Maragoni |
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Affiliation: | Department of Management and Engineering, University of Padova, Vicenza, Italy |
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Abstract: | In this paper, an analytical study is carried out on the work‐hardening, elastic‐plastic stress distributions in a cracked body under antiplane shear deformation. A modified Ramberg‐Osgood law is introduced to describe the material behaviour, and stress and strain fields are derived in closed form. Compared with the conventional Ramberg‐Osgood formulation, the new law includes the effect of a new parameter, κ, which allows the transition from the ideally elastic behaviour (low stress regime) to the power law behaviour (large stress regime) to be controlled, thus providing 1 more degree of freedom to better fit the actual behaviour of engineering materials. A discussion is carried out on the features of stresses and strains close to and far away from the crack tip. |
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Keywords: | antiplane shear deformation crack modified Ramberg‐Osgood law nonlinear material behaviour |
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