Crystal plasticity model of shear and kink bands-energetic approach

0346416 - ÚTIA 2011 RIV GB eng J - Článek v odborném periodiku
Kratochvíl, J. - Kružík, Martin - Sedláček, R.
Crystal plasticity model of shear and kink bands-energetic approach.
Philosophical Magazine. Roč. 90, č. 27 (2010), s. 3729-3742. ISSN 1478-6435. E-ISSN 1478-6443
Grant CEP: GA AV ČR IAA100750802
Výzkumný záměr: CEZ:AV0Z10750506
Klíčová slova: crystal plasticity * kink bands-energetic approach
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 1.302, rok: 2010
http://library.utia.cas.cz/separaty/2010/MTR/kruzik-crystal plasticity model of shear and kink bands-energetic approach.pdf

We present a continuum crystal plasticity model of a lamellar deformation substructure of shear and kink bands. An evolutionary problem for the development of a spontaneous structural inhomogeneity is formulated in the framework of energetic solutions. Conti and Theil proved that in the case of an isothermal single-slip crystal, rigid plasticity with no hardening lamellaea form an optimal microstructure. Moreover, their model predicts the existence of a boundary layer which accommodates the lamellar substructure to displacement boundary conditions. It is suggested that the width of the shear and kink bands is a compromise: the minimization of bulk energy tends to decrease their size, while the energy of the band interfaces or the inner structure of the bands opposes this tendency.
Trvalý link: http://hdl.handle.net/11104/0187453