On the elastic modulus degradation in continuum damage mechanics

Citation
M. Alves et al., On the elastic modulus degradation in continuum damage mechanics, COMPUT STRU, 76(6), 2000, pp. 703-712
Citations number
26
Categorie Soggetti
Civil Engineering
Journal title
COMPUTERS & STRUCTURES
ISSN journal
00457949 → ACNP
Volume
76
Issue
6
Year of publication
2000
Pages
703 - 712
Database
ISI
SICI code
0045-7949(200007)76:6<703:OTEMDI>2.0.ZU;2-4
Abstract
To measure accurately the elastic modulus of a metal, E, can be a difficult task when a specimen undergoes plastic strains. Moreover, some failure cri teria, such as those associated with Continuum Damage Mechanics, require th e change of elastic modulus with strain to define a measure of damage, D, i n a material or structure. Thus, it is important to assess the possible geo metrical influence of a specimen on the measurement of the elastic modulus at different deformation levels. It is shown in this article, with the aid of a numerical simulation, that any plastic strains induce important geomet rical effects in the evaluation of E, which have a significant influence on the evaluation of the scalar damage parameter, D. (C) 2000 Elsevier Scienc e Ltd. All rights reserved.