Abstract
The strain-hardening effect on fracture is investigated with the aid of the T-criterion using HRR stress fields [1–3] around a crack tip in a power hardening material. Using the appropriate components of strain energy density for the elastic-plastic as well as a nearly elastic expression of the T-criterion, we find the fracture angles, as well as fracture stresses in materials possessing an elastic extended up to a perfectly plastic behavior, by considering plane mixed-mode deformation at the crack tip.
Significant influence of the strain hardening coefficient, n on the fracture stress, as well as the hardening parameter α mainly appeared in plane strain conditions. This phenomenon was observed almost independently of the solution applied, which provides a nearly elastic or an elastic-plastic expression of the T-criterion describing the fracture conditions.
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Theocaris, P.S., Demakos, C.B. The strain-hardening effect in HRR plane fields according to T-criterion. Int J Fract 67, 117–132 (1994). https://doi.org/10.1007/BF00019598
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DOI: https://doi.org/10.1007/BF00019598