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• W2944164434 endingPage "103785" @default.
• W2944164434 startingPage "103785" @default.
• W2944164434 abstract "We present a probabilistic framework for brittle fracture that builds upon Weibull statistics and strain gradient plasticity. The constitutive response is given by the mechanism-based strain gradient plasticity theory, aiming to accurately characterize crack tip stresses by accounting for the role of plastic strain gradients in elevating local strengthening ahead of cracks. It is shown that gradients of plastic strain elevate the Weibull stress and the probability of failure for a given choice of the threshold stress and the Weibull parameters. The statistical framework presented is used to estimate failure probabilities across temperatures in ferritic steels. The framework has the capability to estimate the three statistical parameters present in the Weibull-type model without any prior assumptions. The calibration against experimental data shows important differences in the values obtained for strain gradient plasticity and conventional J2 plasticity. Moreover, local probability maps show that potential damage initiation sites are much closer to the crack tip in the case of gradient-enhanced plasticity. Finally, the fracture response across the ductile-to-brittle regime is investigated by computing the cleavage resistance curves with increasing temperature. Gradient plasticity predictions appear to show a better agreement with the experiments." @default.
• W2944164434 created "2019-05-16" @default.
• W2944164434 creator A5017401864 @default.
• W2944164434 creator A5039188187 @default.
• W2944164434 creator A5063188206 @default.
• W2944164434 date "2019-09-01" @default.
• W2944164434 modified "2023-10-18" @default.
• W2944164434 title "Gradient-enhanced statistical analysis of cleavage fracture" @default.
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• W2944164434 doi "https://doi.org/10.1016/j.euromechsol.2019.05.002" @default.
• W2944164434 hasPublicationYear "2019" @default.
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