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Titolo:
Time integration in the context of energy control and locking free finite elements
Autore:
Kuhl, D; Ramm, E;
Indirizzi:
Ruhr Univ Bochum, Inst Struct Mech, D-44780 Bochum, Germany Ruhr Univ Bochum Bochum Germany D-44780 ct Mech, D-44780 Bochum, Germany Univ Stuttgart, Inst Struct Mech, D-70550 Stuttgart, Germany Univ Stuttgart Stuttgart Germany D-70550 ech, D-70550 Stuttgart, Germany
Titolo Testata:
ARCHIVES OF COMPUTATIONAL METHODS IN ENGINEERING
fascicolo: 3, volume: 7, anno: 2000,
pagine: 299 - 332
SICI:
1134-3060(2000)7:3<299:TIITCO>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
ENHANCED ASSUMED STRAIN; CONSERVING COROTATIONAL PROCEDURE; 4-NODE SHELL ELEMENT; NONLINEAR DYNAMICS; HYBRID STRESS; SYSTEMATIC DEVELOPMENT; STRUCTURAL DYNAMICS; INCOMPATIBLE MODES; MOMENTUM METHOD; PLATE-THEORY;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
79
Recensione:
Indirizzi per estratti:
Indirizzo: Kuhl, D Ruhr Univ Bochum, Inst Struct Mech, Univ Str 150, D-44780 Bochum, Germany Ruhr Univ Bochum Univ Str 150 Bochum Germany D-44780 hum, Germany
Citazione:
D. Kuhl e E. Ramm, "Time integration in the context of energy control and locking free finite elements", ARCH COMP M, 7(3), 2000, pp. 299-332

Abstract

In the present paper two main research areas of computational mechanics, namely the finite element development and the design of time integration algorithms are reviewed and discussed with a special emphasis on their combination. The finite element techniques are designed to prevent locking and thetime integration schemes to guarantee numerical stability in non-linear elastodynamics. If classical finite element techniques are used, their combination with time integration schemes allow to avoid any modifications on theelement or algorithmic level. It is pointed out, that on the other hand Assumed Stress and Enhanced Assumed Strain elements have to be modified if they are combined with energy conserving or decaying time integration schemes, especially the Energy-Momentum Method in its original and generalized form. The paper focusses on the necessary algorithmic formulation of Enhanced Assumed Strain elements which will be developed by the reformulation of theGeneralized Energy-Momentum Method based on a classical one-field functional, the extension to a modified HU-WASHIZU three-field functional includingenhanced strains and a suitable time discretization of the additional strain terms. The proposed method is applied to non-linear shell dynamics usinga shell element which allo cvs for shear deformation and thickness change,and in which the Enhanced Assumed Strain Concept is introduced to avoid artificial thickness locking. Selected examples illustrate the locking free and numerically stable analysis.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/07/20 alle ore 20:28:44