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- W1966292261 abstract "We report a combined experimental and computational study of a low constraint aluminum single crystal fracture geometry and investigate the near-tip stress and strain fields. To this end, a single edge notched tensile (SENT) specimen is considered. A notch, with a radius of 50μm, is taken to lie in the (010) plane and its front is aligned along the [101] direction. Experiments are conducted by subjecting the specimen to tensile loading using a special fixture inside a scanning electron microscope chamber. Both SEM micrographs and electron back-scattered diffraction (EBSD) maps are obtained from the near-tip region. The experiments are complemented by performing 3D and 2D plane strain finite element simulations within a continuum crystal plasticity framework assuming an isotropic hardening response characterized by the Pierce–Asaro–Needleman model. The simulations show a distinct slip band forming at about 55deg with respect to the notch line corresponding to slip on (11¯1)[011] system, which corroborates well with experimental data. Furthermore, two kink bands occur at about 45deg and 90deg with respect to the notch line within which large rotations in the crystal orientation take place. These predictions are in good agreement with the EBSD observations. Finally, the near-tip angular variations of the 3D stress and plastic strain fields in the low constraint SENT fracture geometry are examined in detail." @default.
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- W1966292261 date "2008-03-13" @default.
- W1966292261 modified "2023-10-17" @default.
- W1966292261 title "Crack Tip Fields in a Single Edge Notched Aluminum Single Crystal Specimen" @default.
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- W1966292261 doi "https://doi.org/10.1115/1.2884330" @default.
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