HYPERBOLIC LAW OF DUNCAN. COMPARISON BETWEEN SP5 AND EXPERIENCE. TESTS IN SMALL DEFORMATIONS.
Published: 29 Jul 2017
Abstract: The elastic and plastic deformations of loaded materials have aroused the interest of soil mechanics, for an otherwise correct representation of the least appropriate. For well-known soil behavior, it is essential to know the rheological laws governing these bodies considered as a continuous medium. The rigorous method for solving a problem in soil mechanics must contain a model capable of describing the behavior of soils, a choice which justifies the required characteristic parameters (parameters of deformability and rupture), and at the end of the procedures to apply this model to geotechnical problems. Theories of elasticity and plasticity are commonly used in soil mechanics, considering the facilities they represent for their application. With the arrival of informatics, the adoption of more realistic models to describe the behavior of soil, albeit more complex, describes the non-linearity and irreversibility of soil behavior. In this work, we present the curves q-eps, e-eps., e-p, and e-logp of the NC (Normal Consolidated) soils tested under triaxial drained conditions that have been digitized as Kaolinite (black clay), White clay, Very low-density sand. Afterwards, we used SP5 software that follows the hyperbolic law of Duncan to plot the previous curves (for each type of soil). Thanks to another software program, we have superimposed the curves obtained by the experiment and by SP5 to make the comparison and seek the validity of the law. The final part of this publication looks into changes of Poisson's ν coefficient and Young’s E module in the field of small deformations, and useful data is output.
Keywords: hyperbolic law of duncan, sp5, white clay, kaolinite (black clay), very low-density sand, small deformations
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