Torsional shear of mortar: experimental characterization and multiscale modeling

0523999 - ÚTAM 2021 RIV GB eng J - Journal Article
Hlobil, Michal - Kunecký, Jiří - Koudelková, Veronika - Drdácký, Miloš
Torsional shear of mortar: experimental characterization and multiscale modeling.
Construction and Building Materials. Roč. 254, September (2020), č. článku 119126. ISSN 0950-0618. E-ISSN 1879-0526
R&D Projects: GA ČR(CZ) GJ19-25163Y
Institutional support: RVO:68378297
Keywords : cocciopesto mortar * continuum micromechanics * digital image correlation * finite element analysis * microstructure * microstructure multiscale modeling * anti-plane shear fracture (mode III)
OECD category: Civil engineering
Impact factor: 6.141, year: 2020
Method of publishing: Limited access
https://doi.org/10.1016/j.conbuildmat.2020.119126

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.
Permanent Link: http://hdl.handle.net/11104/0308328