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- W2039598725 abstract "Abstract Examined analytically are the fracture patterns that result from an angled crack plate specimen failed by progressive increase of the remote extension. Taking into account are the effects of crack growth overshoot and/or overload; they both change with the effective specimen stiffness that depends on the crack angle. Acquisition of such results requires a consistent approach to crack initiation and growth with the analysis based on applying a criterion repeatedly to the unfractured material ahead of the crack front. Crack initiation is assumed to take place at a site where the maximum of the local minimum strain energy density reaches some critical value that depends on the area under the uniaxial true stress and true strain curve. An oversupply of energy prevails, the magnitude of which increases with decreasing distance to the crack front. The additional growth corresponding to this excess of energy is referred to as “overshoot”. This gives the first increment of crack growth such that all subsequent increments could be obtained by repeating the procedure. It was found that crack growth corrected for overshoot due to a constant effective loading is greater for a crack aligned nearly along the axis of loading than for one aligned nearly perpendicular to the loading direction. Overload effect could also be present and contribute to scatter in the experimental data when the angle between the crack and loading direction becomes small. Notwithstanding the complexity arising from crack growth overshoot, special attention was also given to accuracy of the finite element results as affected by changes in grid patterns and mesh sizes." @default.
- W2039598725 created "2016-06-24" @default.
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- W2039598725 date "1992-12-01" @default.
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- W2039598725 title "Angled crack growth estimate with overshoot and/or overload" @default.
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- W2039598725 doi "https://doi.org/10.1016/0167-8442(92)90004-h" @default.
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