The application of two-parameter approaches to describe crack-tip stress fields has generally focused on Ramberg–Osgood (RO) power law material behavior, which limits the range of applicability of such approaches. In this work we consider the applicability of a or approach (the latter is designated here as the approach) to describe the stress fields for RO power law materials and for a material whose tensile behavior is not described by a RO model. The predictions of the two-parameter approaches are compared with full field finite-element predictions. Results are presented for shallow and deep-cracked tension and bend geometries, as these are expected to provide the expected range of constraint conditions in practice. A new approach for evaluating is proposed for a RO material, which, for a given geometry, makes dependent only on the strain hardening exponent.
Evaluation of Two-Parameter Approaches to Describe Crack-Tip Fields in Engineering Structures
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Kamel, S., O’Dowd, N. P., and Nikbin, K. M. (April 21, 2009). "Evaluation of Two-Parameter Approaches to Describe Crack-Tip Fields in Engineering Structures." ASME. J. Pressure Vessel Technol. June 2009; 131(3): 031406. https://doi.org/10.1115/1.3120266
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