Experimental behavior of iron-based shape memory alloys under cyclic loading histories
The present paper investigates the behavior of iron-based shape memory alloys (Fe-SMAs) subjected to cyclic inelastic straining by means of uniaxial coupon experiments. The tests feature round bar coupons subjected to a broad range of uniaxial cyclic strain histories representative of earthquake loading. The experimental results suggest that the Fe-SMA under investigation exhibits an asymmetric stress-strain relation, with limited superelastic behavior. It was found that the post-yield/phase transformation behavior of the Fe-SMA alloy is both strain-rate and temperature-dependent. Quantitative comparisons with structural steels subjected to nominally identical cyclic strain histories indicate that, although the studied Fe-SMA has a similar energy dissipation per loading excursion with respect to conventional S355J2+N, the Fe-SMA’s hardening response is appreciably higher, leading to comparatively larger elastic strain energies being stored.
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Rosa, D. I. H., Hartloper, A., de Castro e Sousa, A., Lignos, D. G., Motavalli, M., & Ghafoori, E. (2021). Experimental behavior of iron-based shape memory alloys under cyclic loading histories. Construction and Building Materials, 272, Article 121712. https://doi.org/10.1016/j.conbuildmat.2020.121712
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2021-01-01
272
121712
REVIEWED
EPFL
| Funder | Grant Number |
FNS | 206021_177034 |
École polytechnique fédérale de Lausanne (EPFL) | Internal |