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| Avtorstvo: |
Boštjan BRANK // 1.01 Izvirni znanstveni članek
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| Leto: |
1997 |
| Citat: |
BRANK, Boštjan, PERIĆ, Djordje, DAMJANIĆ, Frano. On
large deformations of thin elasto-plastic shells: implementation of a finite
rotation model for quadrilateral shell element. Int. j. numer. methods
eng., 1997, vol. 40, str. 689-726. |
| Povzetek: |
A large-deformation model for
thin shells composed of elasto-plastic material is presented in this work.
Formulation of the shell model, equivalent to the two-dimensional Cosserat
continuum, is developed from the three-dimensional continuum by employing
standard assumptions on the distribution of the displacement field in the shell
body. A model for thin shells is obtained by an approximation of terms
describing the shell geometry. Finite rotations of the director field are
described by a rotation vector formulation. An elasto-plastic constitutive model
is developed based on the von Mises yield criterion and isotropic hardening. In
this work, attention is restricted to problems where strains remain small
allowing for all aspects of material identification and associated computational
treatment, developed for small-strain elastoplastic models, to be transferred
easily to the present elasto-plastic thin-shell model. A finite element
formulation is based on the four-noded isoparametric element. A particular
attention is devoted to the consistent linearization of the shell kinematics and
elasto-plastic material model, in order to achieve quadratic rate of asymptotic
convergence typical for the Newton-Raphson-based solution procedures.
[COBISS.SI-ID 68711]
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| Tipologija: |
1.01 Izvirni znanstveni članek |
| COBISS ID |
68711 Polni zapis iz sistema COBISS |
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Vpisal 2009/06/10 11:56
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