Sobre las curvas tensión-deformación de hormigones y otros materiales sometidos a ensayos de tensión uniaxial

Abstract

This thesis presents an equation that govems the stress-strain behavior of any material subjected to uniaxial stress tests under any stress or strain increase rates and under any temperature, thus it can be considered as a universl:l.l model of uniaxial behavior, in which the classical models - lineal, perfectly plastic, elastic-perfectly plastic or those which obey a power law- are regarded as simple limiting cases of such equation. Consequently, the equation represents one line only, which is continuous and differentiable at every point and it is not necessary to draw it separately in sections to characterize the different phases or singular points that appear, for example, in the curves of building steels at room temperature, including the different yield peaks (upper and lower), plastic plateau or even the Portevin-Le Chatelier effect that such plateau often presents.