![]() ![]() Field experimental results were used to evaluate the numerical model. Three morphological parameters, which are indicators of quantitative crack analysis (i.e., area densities, length densities, and Euler number), were used to describe the spatial distribution and morphological connectivity of cracks. A new parameter, i.e., correlation length of critical strain, was used to reflect the spatially-correlated hetero-geneity of the soil and to construct a critical strain random field. This paper presents a numerical model of the desiccation cracking process, which is based on a lattice of Hookean springs with finite strength and critical strain. Characterization of crack networks in clay soils is needed to quantify the soil-plant relationships. They increase the soil permeability, reduce the soil strength and stability, and thus affect the growth of plant roots. Cracks are common in nature and affect a number of soil properties.
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