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The yield strength, the plastic hardening modulus and the toughness of the copper matrix are determined by the inverse finite element method by matching numerical crack opening profiles with the experimental counterpart.
Numerical results are presented for the traction and opening profiles along the cohesive zone, the fracture energy and lengths of the damage and non-linear zones at different crack speeds and for different material parameters.
Measurements of crack opening profiles have shown that crack tip in the composite remained closed at fairly high stress intensities and was opened to a much smaller displacement compared to the crack tip opening in the matrix alloy at the same stress intensity.
Moreover, extensive ratcheting leads to physically unrealistic shapes of the crack opening profiles.
The recorded crack opening profiles are used to estimate the local as well as the global fracture toughness of the nanocomposite by employing inverse analyses.
Finite element simulations affirmed that the measured crack opening profiles could be reproduced using a cohesive zone model, but not with a linear elastic analysis.
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After these operations, not all the droplets could be filled because some opened profiles remained.
Open profiling and targeted approaches to metabolomics are compared, focusing on high resolution NMR spectroscopy and mass spectrometry, as well as discussing how to analyse the large amounts of data generated using multivariate statistics.
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Torsion and bending/torsion buckling may occur for compressed thin-walled open profiles used in engineering and architecture applications.
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