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28 April 2011 Optimization of magnetoimpedance and stress-impedance effects in single-microwire polymer composites for stress monitoring
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Abstract
The influence of applied stress and the composite geometry on impedance properties of composites containing ferromagnetic microwires has been investigated. The results indicate that the application of tensile stress along the microwire axis and the increase of composite thickness decreased the magneto-impedance (MI) ratio. The stress induced impedance (SI) effect was enhanced with increasing composite thickness reflecting the role of the internal residual stresses. Theoretically calculated matrix-wire interfacial stress from the magneto-impedance profiles is in good agreement with the value of the applied effective tensile stress. This demonstrates a new route to probing the stress conditions of such composites.
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F. Qin, H. X. Peng, V. V. Popov, and M. H. Phan "Optimization of magnetoimpedance and stress-impedance effects in single-microwire polymer composites for stress monitoring", Proc. SPIE 7978, Behavior and Mechanics of Multifunctional Materials and Composites 2011, 79780Z (28 April 2011); doi: 10.1117/12.880462; https://doi.org/10.1117/12.880462
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