Details
| Original language | English |
|---|---|
| Article number | 121712 |
| Journal | Construction and Building Materials |
| Volume | 272 |
| Publication status | Published - 22 Feb 2021 |
| Externally published | Yes |
Abstract
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.
Keywords
- Earthquake loading, Inelastic cyclic loading, Iron-based shape memory alloys, Smart materials, Superelasticity, Temperature dependency
ASJC Scopus subject areas
- Engineering(all)
- Civil and Structural Engineering
- Engineering(all)
- Building and Construction
- Materials Science(all)
- General Materials Science
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In: Construction and Building Materials, Vol. 272, 121712, 22.02.2021.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Experimental behavior of iron-based shape memory alloys under cyclic loading histories
AU - Rosa, Diego Isidoro Heredia
AU - Hartloper, Alexander
AU - de Castro e Sousa, Albano
AU - Lignos, Dimitrios G.
AU - Motavalli, Masoud
AU - Ghafoori, Elyas
N1 - Funding Information: The authors graciously thank re-fer AG to provide the Fe-SMA material used in this study. Additional funding for the financial support of the first, second and third authors was provided by EPFL. This support is gratefully acknowledged. The authors would also like to acknowledge the technical assistance of lab personnel (Mr. Gilles Guignet and Mr. Sylvain Demierre) within the Structures Laboratory (GIS) at EPFL for the execution of the experimental program and instrumentation discussed in this paper. Any opinions, findings, and conclusions or recommendations expressed in this paper are those of the authors and do not necessarily reflect the views of the sponsors. Publisher Copyright: © 2020 Elsevier Ltd
PY - 2021/2/22
Y1 - 2021/2/22
N2 - 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.
AB - 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.
KW - Earthquake loading
KW - Inelastic cyclic loading
KW - Iron-based shape memory alloys
KW - Smart materials
KW - Superelasticity
KW - Temperature dependency
UR - http://www.scopus.com/inward/record.url?scp=85098061277&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2020.121712
DO - 10.1016/j.conbuildmat.2020.121712
M3 - Article
AN - SCOPUS:85098061277
VL - 272
JO - Construction and Building Materials
JF - Construction and Building Materials
SN - 0950-0618
M1 - 121712
ER -