Understanding Cohesive Law Parameters in Ductile Fracture Initiation and Propagation

• Type: Article in International Scientific Journal
• Date: 2021

Authors

Seabra, MRR (Author) Other; José César de Sá (Author) FEUP

Journal

Title: European Journal of Computational Mechanics

Vol. 30

Pages: 51-80

ISSN: 1779-7179

Publisher: River Publishers

Indexing

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Other information

Authenticus ID: P-00V-9DW

DOI: 10.13052/ejcm1779-7179.3012

Abstract (EN): Continuum Damage Mechanics is successfully employed to describe the behaviour of metallic materials up to the onset of fracture. Nevertheless, on its own, it is not able to accurately trace discrete crack paths. In this contribution, Continuous Damage Mechanics is combined with the XFEM and a Cohesive Law to allow the full simulation of a ductile fracture process. In particular, the Cohesive Law assures an energetically consistent transition from damage to crack for critical damage values lower than one. Moreover, a novel interpretation is given to the parameters of the cohesive law. A fitting method derived directly from the damage model is proposed for these parameters, avoiding additional experimental characterization.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 30