Spatial damage sensing ability of metallic particulate-reinforced cementitious composites: Insights from electrical resistance tomography. (5th August 2019)

• Record Type: Journal Article
• Authors: Nayak, Sumeru; Das, Sumanta
• Is Part Of: Materials & design. Volume 175(2019)
• Publication Date: 2019-08-05
• Subjects: Electrical resistance tomography (ERT) -- Numerical homogenization -- Iron powder -- Electrical conductivity -- Spatial damage sensing; Materials -- Periodicals; Engineering design -- Periodicals; Matériaux -- Périodiques; Conception technique -- Périodiques; Electronic journals; 620.11
• DOI: 10.1016/j.matdes.2019.107817
• Languages: English
• ISSNs: 0264-1275

Abstract

Abstract: The paper evaluates the spatial damage sensing ability of self-sensing mortars containing up to 40% waste metallic iron powder by volume as cement-replacement. The spatial damage-sensing ability is evaluated using a framework that integrates the electrical resistance tomography (ERT)-based conductivity reconstruction algorithm with multiscale numerical homogenization with a view to enable microstructure-guided design of such self-sensing composites. The ERT-based framework uses experimentally measured boundary electrode voltages as input; assigns the effective conductivity of the composite (obtained from numerical homogenization) as initial estimate of the conductivity distribution and initiates the iterative process involving the well-posed forward model and the ill-posed inverse problem to obtain the conductivity map in the damaged configuration. The reconstructed damage maps, thus obtained, confirm sufficient spatial damage-sensing ability of mortars containing 30% or greater amount of iron powder validating the applicability of such self-sensing composites towards spatial damage sensing for health monitoring of structures. Graphical abstract: Unlabelled Image Highlights: Spatial damage sensing ability of metallic waste iron powder-incorporated cementitious systems is evaluated Evaluation of spatial damage sensing ability is performed using electrical resistance tomography (ERT) Spatial damage sensing ability improves progressively with increase in iron powder content Iron powder content 30% or greater (Cement-replacement) shows sufficient spatial damage sensing ability