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On mixed finite element formulations and stress recovery techniques
Author(s) -
Mota Alejandro,
Abel John F.
Publication year - 2000
Publication title -
international journal for numerical methods in engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.421
H-Index - 168
eISSN - 1097-0207
pISSN - 0029-5981
DOI - 10.1002/(sici)1097-0207(20000110/30)47:1/3<191::aid-nme767>3.0.co;2-s
Subject(s) - finite element method , mixed finite element method , stress (linguistics) , element (criminal law) , extended finite element method , mathematics , structural engineering , mathematical analysis , engineering , law , philosophy , linguistics , political science
The relationship between a mixed finite element formulation based on the Hu–Washizu (HW) functional and stress recovery techniques is elucidated. Although mixed formulations are primarily motivated by avoidance of locking phenomena in finite element solutions, it is shown that a mixed formulation based on the HW functional, with displacements, stresses and strains as fields, is so intimately related to stress recovery that the formulation itself can also be viewed as a stress recovery method. Copyright © 2000 John Wiley & Sons, Ltd.