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NHERI LEHIGH Seminar Seris


Abstract:

Condition evaluation of large-scale structures, termed mesoscale structures
(e.g. civil, aerospace, and energy structures) is difficult due to their
large size and complex geometries. Additionally, there exists a lack of
economic and scalable sensing technologies that are capable of detecting,
localizing, and quantifying local faults over a structures global area. A
solution to this local-global problem is the deployment of an inexpensive
dense sensor network that is capable of detecting and localizing damage
over a structure’s global area.

This work will present advancements in two such dense sensor networks. The
first consists of a sensing skin developed from a flexible capacitor that
is mounted externally onto the structure. When deployed in a dense sensor
network configuration, these large area sensors are capable of covering
large surfaces at low cost and can monitor both strain- and crack-induced
damages. The second sensing technology consists of smart-cementitious
material doped with multi-wall carbon nanotubes, which has been
demonstrated to be suitable for monitoring its own deformations (strain)
and damage state (cracks). Integrated into a structure, this smart
cementitious material can be used for detecting damage or strain through
the monitoring of its electrical properties.
-- 
Marti LaChance
nheri.communications at gmail.com
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