Abstract
We review basic features of recently-proposed two-parameter fracture mechanics descriptions of plane strain mode I elastic-plastic crack-tip fields. One of the parameters, the J-integral, essentially measures the scale of crack-tip deformation. Various choices have been proposed for a second crack-tip parameter characterizing the triaxiality of the crack-tip stress state. We discuss relative advantages and disadvantages of these second parameters in extending traditional fracture mechanics methodology. The additional resolution which a second parameter affords in describing the various levels of stress triaxiality encountered in laboratory specimens and structures suggests new approaches to the interpretation of experimental fracture data and to fracture mechanics applications in structures and components.
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Parks, D.M. (1992). Advances in Characterization of Elastic-Plastic Crack-Tip Fields. In: Argon, A.S. (eds) Topics in Fracture and Fatigue. Springer, New York, NY. https://doi.org/10.1007/978-1-4612-2934-6_2
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DOI: https://doi.org/10.1007/978-1-4612-2934-6_2
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