Naslov
Increasing solution stability for finite-element modeling of elasto-plastic shell response

Autori
Montag, Ulrich ; Krätzig, Wilfried B. ; Sorić, Jurica

Izvornik
Advances in engineering software (0965-9978) 30 (1999); 607-619

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
finite element analysis; plasticity; shell structures; layered approach; consistent linearization; return-mapping algorithm

Sažetak
The present article introduces a highly efficient numerical simulation strategy for the analysis of elasto-plastic shell structures. An isoparametric Finite Element, based on a Finite Rotation Reissner-Mindlin shell theory in isoparametric formulation, is enhanced by a Layered Approach for a realistic simulation of nonlinear material behaviour. A general material model including isotropic hardening effects is embedded into each material point. A new, highly accurate integration scheme is combined with consistently linearized constitutive relations in order to achieve quadratic rate of converegence. A global Riks-Wempner-Wessels iteration scheme enhanced by a linear Line-Search procedure was used to trace arbitrary deformation paths. Numerical examples show the efficiency of the present concept.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

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