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An enhanced continuous-discontinuous multiscale method for modeling mode-I cohesive failure in random heterogeneous quasi-brittle materials

Nguyen, Vinh Phu, Stroeven, Martijn and Sluys, Lambertus Johannes 2012. An enhanced continuous-discontinuous multiscale method for modeling mode-I cohesive failure in random heterogeneous quasi-brittle materials. Engineering Fracture Mechanics 79 , pp. 78-102. 10.1016/j.engfracmech.2011.10.005

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Abstract

In this manuscript we present an extension of the computational homogenization scheme for cohesive crack modeling of heterogeneous quasi-brittle materials which has recently been proposed by the authors. The proposed continuous–discontinuous multiscale method is a combination of the standard bulk computational homogenization theory and the recently developed discontinuous homogenization scheme to model the transition of microscopic diffusive damage to macro-cracks for tensile cracking problems. A new evolutionary boundary condition for the microscopic samples is presented. Numerical examples including verification against a direct numerical simulation and crack propagation simulations are given to demonstrate the capabilities of the method. The proposed homogenization scheme allows to define a representative volume for random heterogeneous quasi-brittle materials that show strain localization.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Uncontrolled Keywords: Fully coupled multiscale; Computational homogenization; Multiscale cohesive law; Representative volume element (RVE); Random heterogeneous quasi-brittle materials
Publisher: Elsevier
ISSN: 0013-7944
Last Modified: 21 Oct 2016 03:28
URI: http://orca.cf.ac.uk/id/eprint/45800

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