Numerical Simulations of Void Linkage in Model Materials using a Nonlocal Ductile Damage Approximation

Weck, Arnaud and Segurado Escudero, Javier and Llorca Martinez, Francisco Javier and Wilkinson, David and Böhm, Helmut (2007). Numerical Simulations of Void Linkage in Model Materials using a Nonlocal Ductile Damage Approximation. "International Journal of Fracture", v. 148 (n. 3); pp. 205-219. ISSN 0376-9429. https://doi.org/10.1007/s10704-008-9195-5.

Description

Title: Numerical Simulations of Void Linkage in Model Materials using a Nonlocal Ductile Damage Approximation
Author/s:
  • Weck, Arnaud
  • Segurado Escudero, Javier
  • Llorca Martinez, Francisco Javier
  • Wilkinson, David
  • Böhm, Helmut
Item Type: Article
Título de Revista/Publicación: International Journal of Fracture
Date: December 2007
ISSN: 0376-9429
Volume: 148
Subjects:
Freetext Keywords: Linkage • Coalescence • Ductile fracture • Nonlocal damage models • Finite element • Laser drilled model material.
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Ciencia de los Materiales
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Experiments on the growth and linkage of 10 μm diameter holes laser drilled in high precision patterns into Al-plates were modelled with finite elements. The simulations used geometries identical to those of the experiments and incorporated ductile damage by element removal under the control of a ductile damage indicator based on the micromechanical studies of Rice and Tracey. A regularization of the problem was achieved through an integral-type nonlocal model based on the smoothing of the rate of a damage indicator D over a characteristic length L. The simulation does not predict the experimentally observed damage acceleration either in the case where no damage is included or when only a local damage model is used. However, the full three-dimensional simulations based on the nonlocal damage methodology do predict both the failure path and the failure strain at void linkage for almost all configurations studied. For the cases considered the critical parameter controlling the local deformations at void linkage was found to be the ratio between hole diameter and hole spacing.

More information

Item ID: 2583
DC Identifier: http://oa.upm.es/2583/
OAI Identifier: oai:oa.upm.es:2583
DOI: 10.1007/s10704-008-9195-5
Official URL: http://www.springerlink.com/content/l80540021n06/?p=396f955ab75b468a8dc273152f24483b&pi=24
Deposited by: Memoria Investigacion
Deposited on: 23 Mar 2010 09:56
Last Modified: 20 Apr 2016 12:14
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