An incremental variational principle minimizing experimental measurement errors and its application to an intelligent hybrid experimental-numerical method - (Case of nonlinear elastic-plastic deformation field)

Citation
T. Nishioka et al., An incremental variational principle minimizing experimental measurement errors and its application to an intelligent hybrid experimental-numerical method - (Case of nonlinear elastic-plastic deformation field), JSME A, 44(1), 2001, pp. 71-81
Citations number
19
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Mechanical Engineering
Journal title
JSME INTERNATIONAL JOURNAL SERIES A-SOLID MECHANICS AND MATERIAL ENGINEERING
ISSN journal
1344-7912 → ACNP
Volume
44
Issue
1
Year of publication
2001
Pages
71 - 81
Database
ISI
SICI code
1344-7912(200101)44:1<71:AIVPME>2.0.ZU;2-D
Abstract
In previous studies, for the case of linear elastic deformation held, the a uthors developed a hybrid experimental-numerical method based on a variatio nal principle minimizing experimental measurement errors. In this study, fo r the case of nonlinear elastic-plastic deformation field, first, an increm ental variational principle is derived to minimize the errors and noises as sociated with a full-field displacement measurement such as moire interfero metry. Next, on the basis of this variational principle, an intelligent hyb rid experimental-numerical method is developed for the case of nonlinear el astic-plastic deformation field. The intelligent hybrid method demonstrates automatic detection and elimination of the measurement errors and smooth v isualization of stress and strain contours. Furthermore, the intelligent hy brid method automatically achieves the path independence of the T* integral , restoring the path-dependence caused by the measurement errors. This pape r provides the foundation of an intelligent measurement and visualization o f displacement and stress fields in actual structural components.