Thermodynamical Framework for Ductile Damage and Plasticity

• Type: Article in International Conference Proceedings Book
• Date: 2010

Authors

Jose M A C Cesar de Sa (Author) FEUP; Filipe X C Andrade (Author) Other; Francisco M A Andrade Pires (Author) FEUP

Conference proceedings International

Title: ISCM II AND EPMESC XII, PTS 1 AND 2

Pages: 1117-1122

2nd International Symposium on Computational Mechanics12th International Conference on the Enhancement and Promotion of Computational Methods in Engineering and Science

Hong Kong, PEOPLES R CHINAMacau, PEOPLES R CHINA, NOV 30-DEC 03, 2009DEC 02-03, 2009

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Scientific classification

FOS: Engineering and technology > Civil engineering

Other information

Authenticus ID: P-003-BG0

DOI: 10.1063/1.3452058

Abstract (EN): Many models employed for the prediction of plastic deformation rely exclusively on elastoplastic theories, disregarding significant effects of internal degradation [1]. Constitutive models based on the Continuum Damage Mechanics theory provide more realistic predictions since damage is taken into account as an internal variable. In the present contribution, Lemaire's model for ductile damage [2] is questioned under the assumption of the principle of maximum inelastic dissipation [3]. The model is enhanced with a nonlocal formulation where the damage variable is spatially averaged by means of an integral operator [4]. Thermodynamical admissibility of the nonlocal model is checked by applying the global version of the Clausius-Duhem inequality [5]. Results from numerical analysis show that the constitutive model is insensitive to spatial discretization.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6