Journal
COMPUTATIONAL MECHANICS
Volume 59, Issue 2, Pages 299-316Publisher
SPRINGER
DOI: 10.1007/s00466-016-1351-6
Keywords
Continuum damage mechanics; Crack-tracking; Damage localization; Quasi-brittle materials; Shear/flexural/tensile cracks
Funding
- MINECO (Ministerio de Economia y Competitividad of the Spanish Government)
- ERDF (European Regional Development Fund) [BIA2015-63882-P, MAT 2013-48624-C2-1-P]
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Tracking algorithms constitute an efficient numerical technique for modelling fracture in quasi-brittle materials. They succeed in representing localized cracks in the numerical model without mesh-induced directional bias. Currently available tracking algorithms have an important limitation: cracking originates either from the boundary of the discretized domain or from predefined crack-root elements and then propagates along one orientation. This paper aims to circumvent this drawback by proposing a novel tracking algorithm that can simulate cracking starting at any point of the mesh and propagating along one or two orientations. This enhancement allows the simulation of structural case-studies experiencing multiple cracking. The proposed approach is validated through the simulation of a benchmark example and an experimentally tested structural frame under in-plane loading. Mesh-bias independency of the numerical solution, computational cost and predicted collapse mechanisms with and without the tracking algorithm are discussed.
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