Constitutive models for numerical analysis of the short- and long-term behavior of geosynthetics and mechanical damage
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abstract
Analyse the tensile response of different geosynthetics;
Apply constitutive models to describe the nonlinear tensile behaviour of these materials in the short- and the long-term, before and after damage; Propose model parameters for intact and damaged specimens.
Assess the tensile response of a geosynthetic in the short- and long-term
Analyze damaged and undamaged specimens
Fit tensile load vs. strain curves using constitutive models
Estimate damaged tensile properties from model parameters of
undamaged specimens. Extrapolate creep data
Estimate long-term tensile properties from short-term model parameters
The objective of this research is to analyse the tensile response of geosynthetics, apply constitutive equations, and propose values for model parameters to represent the nonlinear behaviour of these materials in the short-term and the long-term. Data for specimens submitted to mechanical damage, abrasion damage, and mechanical damage followed by abrasion damage will be analysed. Nonlinear regressions of the experimental results will be performed to fit the load-strain curves to constitutive equations. For each geosynthetic, the results of damaged specimens will be statistically compared to those of the undamaged specimens to observe the influence of the induced damage on the tensile behaviour of the materials over time. Experimental results will be statistically compared with those obtained by the constitutive models to verify if the tensile properties and the model parameters are properly estimated.
