IMPROVEMENT OF THE NUMERICAL PREDICTION OF DUCTILE FAILURE WITH AN INTEGRAL NONLOCAL DAMAGE MODEL

• Type: Article in International Scientific Journal
• Date: 2009

Authors

F. X. C. Andrade (Author) Other; F. M. Andrade Pires (Author) FEUP; J. M. A. César de Sá (Author) FEUP; L. Malcher (Author) Other

Journal

Title: International Journal of Material Forming

Vol. 2 No. 1

Pages: 439-442

ISSN: 1960-6206

Publisher: Springer Nature

Indexing

ISI Web of Knowledge - 5 Citations

Scopus - 9 Citations

COMPENDEX

Scientific classification

FOS: Engineering and technology > Other engineering and technologies

Other information

Authenticus ID: P-003-H32

DOI: 10.1007/s12289-009-0523-8

Abstract (EN): In this contribution, the implementation of a nonlocal formulation is described aiming to improve the reliability of the numerical prediction of ductile failure. The nonlocal model, which is based on a simplified version of Lemaitre's material model [1], is achieved by redefining the damage variable to be nonlocal using an integral formulation. The nonlocal constitutive problem is then discretised with respect to pseudo-time by means of a backward Euler scheme. A numerical approach similar to a fully implicit elastic predictor/return mapping algorithm [2] is adopted here with the difference that in the present algorithm all material points are integrated simultaneously. The results show that the proposed numerical strategy improves the numerical reliability of ductile failure prediction by attenuating the pathological dependency of numerical results upon mesh refinement.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4