Dear all,
I performed a micromechanical cantilever beam bending analysis on the reconstructed real sample of microstructure from the SEM image. This numerical analysis has been particularly carried out to simulate the debonding mechanism and to determine the correct interfacial properties (such as cohesive strength, fracture energy and the onset of fracture displacement) based on the trial and error basis, thereby calibrating against the available real specimen experimental test results. For these sensitivity studies, I have also considered the assumption that debonding should be pure opening mode (Mode I: Normal mode) and the bulk material should undergo small deformation and linear elastic constitutive condition.
From the analyzed numerical result of the debonded microstructure (please refer attached file), where I locally extracted the normal and tangential relative displacements of the corresponding particular pair of nodes at the two interfacial regions such as regular (Paired nodes: 120782 and 1535) and inclined interface regions (Paired nodes: 120280 and 10) (please see the attached file for clear understanding). Hence, I noticed that for the case of an inclined interfacial region, where the extracted relative tangential displacement is much more than the normal displacement even under the condition of pure opening mode state. But is not pronounced for the case of a regular interfacial zone because there observed relative normal displacement is lightly more than tangential displacement at each increment of the applied load (see the attached file).
I request you to all please give some suggestion on why the observed relative tangential displacement is more than normal displacement particularly at the measured inclined interfacial zones even under the context of pure opening mode analysis case.
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