Abstract
This paper presents a multidisciplinary study aimed at characterizing the pure shear behavior of Portland cement-based mortars blended with natural hydraulic lime. Circular thin-walled tube mortar specimens were subjected to pure torsional loading inducing anti-plane shear (mode III) fracture. The deformation of the specimen during loading was assessed on its curved surface using an optical measurement setup based on the digital image correlation technique. Modeling of shear fracture encompassed two sequential steps: i) a multiscale homogenization using continuum micromechanics was employed to upscale the elastic properties of the material based on a thorough microstructural characterization, followed by ii) a full structural simulation of the shear fracture using finite element analysis. The proposed methodology was successfully validated on two distinct loading cases and allows to link the microstructural composition to the structural behavior of the material.
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