Title:
Strain Sensing Ability of Metallic Particulate Reinforded Cementitious Composites: Experiments and Modeling
Author(s):
Tripathi
Publication:
Web Session
Volume:
ws_F23_Tripathi_2.pdf
Issue:
Appears on pages(s):
Keywords:
DOI:
Date:
10/29/2023
Abstract:
Electrical impedance spectroscopy coupled with equivalent circuit modeling is used to determine the bulk resistance of the composite beams containing up to 40% by volume of conductive particulates under flexural loading. The fractional change in resistance and the gage factor, as functions of the applied stress, increases with increasing iron particulate con-tent, demonstrating the ability of these composites in self-sensing. A microstructure-guided electro-mechanical finite element model is used to simulate the strain sensing response of these composites. The 2D microstructure is subjected to different applied tensile stresses, and the deformed geometry subjected to an electrical potential to simulate the change in resistance. For anisotropic structures obtained by layered 3D printing, the effect of the number and quality of the interfaces, and the resulting directional dependence of the transport of moisture and deleterious ions is measured by electrical impedance spectroscopy. Models and experiments delineate the effects of layering on the electrical flow lines and how the layering can be structured to reduce transport.