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Sayed, Tamer El
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Publications (5/5 displayed)
- 2015A multiscale phenomenological constitutive model for strain rate dependent tensile ductility in nanocrystalline metalscitations
- 2012A phenomenological two-phase constitutive model for porous shape memory alloyscitations
- 2012A thermomechanical crystal plasticity constitutive model for ultrasonic consolidationcitations
- 2011Acoustic softening in metals during ultrasonic assisted deformation via CP-FEMcitations
- 2010Modeling of acoustic softening effects in metals using crystal plasticity theor
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article
A multiscale phenomenological constitutive model for strain rate dependent tensile ductility in nanocrystalline metals
Abstract
<p>A variational multiscale constitutive model that accounts for strain rate dependent ductility of nanocrystalline materials during intergranular failure has been presented. The presented model is an extension of the previous work [1], in which a nanocrystalline material is modelled as two-phase with grain interior being modelled using crystal plasticity theory while grain boundary affected zone using porous plasticity model which accounts for ductile damage due to void growth and coalescence. The model capability of capturing the strain rate dependent deformation and failure has been demonstrated through validations against uniaxial test data taken from literature. The validated results show a good agreement between experimental and simulated response.</p>