Abstract
In the paper the lattice model developed in the Stevin Laboratory is outlined. In the model, the material is discretised as a network of brittle breaking beam elements. For simulating fracture in highly disordered materials like concrete and rock, the material structure is mimiced in great detail. The generated (two-dimensional) structure of the material is projected on top of a regular triangular lattice, or on top of a lattice with beams of random length. The amount of detail included in the material structure determines the size of the beam elements used in the lattice. Obviously the computer time will increase with the size of the lattice, and the available computer capacity mainly determines the size of the lattices that can be analysed. Fracture is simulated by removing in each load step the beam with the highest stress over strength ratio. This implies that fracture is completely brittle, and the results obtained so far indicate a close relationship between the amount of detail included in the projected material structure and the computed softening behaviour of concrete in tension. In the laboratory the model is used for assessing the response of fracture tests, for example for determining the correct response parameter in a displacement controlled experiment. Some examples of analyses are included in the paper.
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© 1994 Springer Science+Business Media Dordrecht
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Van Mier, J.G.M., Vervuurt, A., Schlangen, E. (1994). Crack Growth Simulations in Concrete and Rock. In: Breysse, D. (eds) Probabilities and Materials. NATO ASI Series, vol 269. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-1142-3_32
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DOI: https://doi.org/10.1007/978-94-011-1142-3_32
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