The paper aims to formulate assumed stress finite elements for the analysis of elastoplastic structures. The interpolations of the displacement and stress fields, typical of the elastic version of the mixed elements, is enriched with the FEM representation of the plastic strain field. The formulation of the elastoplastic problem of the element is then established, consistently, with respect to its variational basis based on the weak enforcement of the compatibility condition. Its correlation with the Haar–Karman principle leads to a minimization problem of a quadratic functional subjected to a linearized form of the plastic admissibility constraints.

Mixed finite elements for the elastoplastic analysis of 2D continua

LANZO, Antonio Domenico;
2004

Abstract

The paper aims to formulate assumed stress finite elements for the analysis of elastoplastic structures. The interpolations of the displacement and stress fields, typical of the elastic version of the mixed elements, is enriched with the FEM representation of the plastic strain field. The formulation of the elastoplastic problem of the element is then established, consistently, with respect to its variational basis based on the weak enforcement of the compatibility condition. Its correlation with the Haar–Karman principle leads to a minimization problem of a quadratic functional subjected to a linearized form of the plastic admissibility constraints.
9789513918668
9789513918682
File in questo prodotto:
File Dimensione Formato  
ECCOMAS_04.pdf

accesso aperto

Tipologia: Documento in Post-print
Licenza: DRM non definito
Dimensione 229.1 kB
Formato Adobe PDF
229.1 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11563/9674
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact