期刊
ENGINEERING FRACTURE MECHANICS
卷 77, 期 13, 页码 2431-2450出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfracmech.2010.06.013
关键词
Continuum damage model; Strain localization; Tensile cracking; Crack-tracking technique; Quasi-brittle materials
类别
资金
- DGE of the Spanish Ministry of Science and Technology [BIA2006-04127, CSD2006-00060]
This work presents a procedure to simulate the growth and propagation of localized tensile cracks on quasi-brittle materials. The so-called smeared damage approach, which consists in standard finite elements and local nonlinear constitutive laws, is recovered and improved in order to represent crack localization and avoid spurious mesh-bias dependence in the discrete problem. This is achieved by means of the implementation of a local crack-tracking algorithm which can reproduce individual (discrete) cracks and ensure objectivity of the finite element problem solution. The performance of the localized damage model is stressed by means of the analyses of structural case-studies. Compared to the Smeared Crack Approach in its original form, the presented procedure shows clearly a better capacity to predict realistic collapse mechanisms. The proposed tracking technique is relatively inexpensive. (C) 2010 Elsevier Ltd. All rights reserved.
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