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A new one-point quadrature enhanced assumed strain (EAS) solid-shell element with multiple integration points along thickness - part II: nonlinear applications

Version 2 2024-06-03, 17:05
Version 1 2017-05-17, 14:00
journal contribution
posted on 2024-06-03, 17:05 authored by RJ Alves de Sousa, RPR Cardoso, RA Fontes Valente, Jeong YoonJeong Yoon, JJ Grácio, RM Natal Jorge
In this work the recently proposed Reduced Enhanced Solid-Shell (RESS) finite element, based on the enhanced assumed strain (EAS) method and a one-point quadrature integration scheme, is extended in order to account for large deformation elastoplastic thin-shell problems. One of the main features of this finite element consists in its minimal number of enhancing parameters (one), sufficient to circumvent the well-known Poisson and volumetric locking phenomena, leading to a computationally efficient performance when compared to other 3D or solid-shell enha nced strain elements. Furthermore, the employed numerical integration accounts for an arbitrary number of integration points through the thickness direction within a single layer of elements. The EAS formulation comprises an additive split of the Green-Lagrange material strain tensor, making the inclusion of nonlinear kinematics a straightforward task. A corotational coordinate system is used to integrate the constitutive law and to ensure incremental objectivity. A physical stabilization procedure is implemented in order to correct the element's rank deficiencies. A variety of shell-type numerical benchmarks including plasticity, large deformations and contact are carried out, and good results are obtained when compared to well-established formulations in the literature.

History

Journal

International journal for numerical methods in engineering

Volume

67

Pagination

160-188

Location

London, Eng.

ISSN

0029-5981

eISSN

1097-0207

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2006, John Wiley & Sons

Issue

2

Publisher

Wiley-Blackwell

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