Abstract
In the field of structural health monitoring (SHM), innovative methods of non-destructive evaluation (NDE) are currently being investigated with the purpose of providing prognostic information toward safer, longer lasting structures. Therefore, it is desirable to integrate NDE techniques with existing structural reinforcement techniques for in situ measurement capability, increasing service life. Magnetic shape memory alloys (MSMAs) offer the potential for NDE via magnetic sensing, while further offering the multi-functionality of crack closing and structural reinforcement. The current research proposes a novel SHM approach for concrete structures using embedded MSMAs for magnetic sensing, and investigates the properties of such a system.
Highlights
Cracks are formed and propagate in concrete structures due to applied mechanical or environmental loads leading to catastrophic failure in infrastructures
Magnetic sensing may provide an advantage for structural health monitoring (SHM) in that the magnetic permeability of concrete, water, and air are nearly identical to that of free space and have no noticeable effect on the magnetic field generated by a permanent magnet; all sensing changes can be attributed to localized stress induced phase changes in the embedded Magnetic shape memory alloys (MSMAs)
The primary purpose of the framework is to evaluate the feasibility of MSMAs ( FeMnAlNi) as multifunctional sensors for SHM using non-destructive evaluation (NDE)
Summary
Cracks are formed and propagate in concrete structures due to applied mechanical or environmental loads leading to catastrophic failure in infrastructures. Magnetic sensing may provide an advantage for SHM in that the magnetic permeability of concrete, water, and air are nearly identical to that of free space and have no noticeable effect on the magnetic field generated by a permanent magnet; all sensing changes can be attributed to localized stress induced phase changes in the embedded MSMA. This use of magnetic sensing for non-destructive evaluation represents an inherently multidisciplinary research area with respect to both the computational and experimental domain. An evaluation of SMAs for magnetic sensing is required for both the structural and magnetic domains
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