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Crack propagation simulation of concrete with the regular triangular lattice model
조병완,태기호,Erik Schlangen,김창현 한국계산역학회 2005 Computers and Concrete, An International Journal Vol.2 No.2
This paper discusses 2D lattice models of beams for simulating the fracture of brittle materials. A simulation of an experiment on a concrete beam subjected to bending, in which two overlapping cracks occur, is used to study the effect of individual beam characteristics and different arrangements of the beams in the overall lattice. It was found that any regular orientation of the beams influences the resulting crack patterns. Methods to implement a wide range of Poisson뭩 ratios are also developed, and the use of the lattice to study arbitrary micro-structures is outlined. The crack patterns that are obtained with lattice are in good agreement with the experimental results. Also, numerical simulations of the tests were performed by means of a lattice model, and non-integer dimensions were measured on the predicted lattice damage patterns.
The Effect of Cracks on Chloride Penetration into Concrete
Yoon, In Seok,Schlangen, Erik,Rooij, Mario R. de,van Breugel, Klaas Trans Tech Publications, Ltd. 2007 Key engineering materials Vol.348 No.-
<P>This study is focused on examining the effect of critical crack width in combination with crack depth on chloride penetration into concrete. Because concrete structures have to meet a minimum service-life, critical crack width has become an important parameter. Specimens with different crack width / crack length have been subjected to rapid chloride migration testing (RCM). The results of this study show a critical crack width of about 0.012 mm. Cracks smaller than this critical crack width are considered not to have a significant influence on the rate of chloride transport inwards, while chloride penetration does proceed faster above this critical crack width.</P>