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The effect of T-stress on plane strain dynamic crack growth in elastic-plastic materials

Jayadevan, KR and Narasimhan, R and Ramamurthy, TS and Dattaguru, B (2003) The effect of T-stress on plane strain dynamic crack growth in elastic-plastic materials. In: Fatigue and Fracture of Engineering Materials and Structures, 26 (7). pp. 647-660.

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Official URL: http://onlinelibrary.wiley.com/doi/10.1046/j.1460-...


In this paper, the effects of T -stress on steady, dynamic crack growth in an elastic-plastic material are examined using a modified boundary layer formulation. The analyses are carried out under mode I, plane strain conditions by employing a special finite element procedure based on moving crack tip coordinates. The material is assumed to obey the J (2) flow theory of plasticity with isotropic power law hardening. The results show that the crack opening profile as well as the opening stress at a finite distance from the tip are strongly affected by the magnitude and sign of the T -stress at any given crack speed. Further, it is found that the fracture toughness predicted by the analyses enhances significantly with negative T -stress for both ductile and cleavage mode of crack growth.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to John Wiley and Sons.
Keywords: ynamic crack growth;dynamic fracture toughness;elastic–plastic materials;finite elements;T-stress
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Division of Mechanical Sciences > Mechanical Engineering
Depositing User: Ms V Mangala
Date Deposited: 24 Aug 2011 08:37
Last Modified: 24 Aug 2011 08:37
URI: http://eprints.iisc.ac.in/id/eprint/40270

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