Naslov
A natural approach to plasticity problems

Autori
Lozina, Željan ; Cvitanić, Vedrana ; Marović, Pavao

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of 2nd ESAFORM Conference on Material Forming / J.A.Covas - Guimaraes, 1999, 589-592

Skup
2nd ESAFORM Conference on Material Forming

Mjesto i datum
Guimarães, Portugal, 13.04.1999. - 17.04.1999

Vrsta sudjelovanja
Pozvano predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Natural factor method; Plasticity problems; Factorisation; Numerical errors

Sažetak
The natural factor method is applied in this paper in solving the plasticity problems. It is technique of direct construction of the factorised form of the element and system stiffness matrices, i.e. element and system natural factor, from their natural stiffness root. The sensitivity of the system natural factor matrix is studied using singular value decomposition and it is shown that it is better conditioned then system stiffness matrix. The numerical efforts in data handling and memory requirements during solution phase performed over system natural factor matrix involving classical approach based on Givens rotations and frontal approach based on RT decomposition are discussed. Numerical error growth with increasing condition number of system stiffness matrix is compared for finite element and natural factor approach on simple example. Application of the natural factor method to plasticity problems is presented from the algorithmic point of view.

Izvorni jezik
Engleski

Znanstvena područja
Građevinarstvo, Strojarstvo

POVEZANOST RADA