In this work a phenomenological approach is employed for fracture initation and propagation in SENT specimens. Modified Mohr-Coulomb (MMC) fracture criterion establish the initiation of damage/fracture at the critical material point and the post-initation softening controls its rate of propagation. By means of a tridimensional mixed stress state (equivalent plastic strain, εp; Triaxiality, η; and Lode angle, θ) the nature of the growing crack front can be explained.
A Numerical Study on Crack Growth Resistance Curve of X70 Steels
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Paredes, M, Zelenak, P, & Wierzbicki, T. "A Numerical Study on Crack Growth Resistance Curve of X70 Steels." Proceedings of the ASME 2016 Pressure Vessels and Piping Conference. Volume 6B: Materials and Fabrication. Vancouver, British Columbia, Canada. July 17–21, 2016. V06BT06A048. ASME. https://doi.org/10.1115/PVP2016-63911
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