Abstract
This paper describes a preliminary examination of the effect of in-plane constraint on creep crack growth under widespread creep conditions using the Q stress. Plane strain is assumed. Damage models for fracture of the process zone based on both ductility exhaustion and stress rupture are shown to predict a variation of the crack growth rate with Q. Lower levels of constraint lead to lower crack growth rates for a given C*. The results are used to outline a high temperature failure assessment diagram approach to constraint-dependent creep crack growth.
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Budden, P.J., Ainsworth, R.A. The effect of constraint on creep fracture assessments. International Journal of Fracture 97, 237–247 (1999). https://doi.org/10.1023/A:1018305919622
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DOI: https://doi.org/10.1023/A:1018305919622