Experimental behavior of iron-based shape memory alloys under cyclic loading histories

被引：38

作者：

Rosa, Diego Isidoro Heredia ^{[1
]}

Hartloper, Alexander ^{[1
]}

de Castro e Sousa, Albano ^{[1
]}

Lignos, Dimitrios G. ^{[1
]}

Motavalli, Masoud ^{[2
]}

Ghafoori, Elyas ^{[2
]}

机构：

[1] Ecole Polytech Fed Lausanne EPFL, Stn 18, CH-1015 Lausanne, Switzerland

[2] Swiss Fed Labs Mat Sci & Technol Empa, Uberlandstr 129, CH-8600 Dubendorf, Switzerland

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2021年 / 272卷

关键词：

Iron-based shape memory alloys; Inelastic cyclic loading; Temperature dependency; Earthquake loading; Superelasticity; Smart materials; CIVIL ENGINEERING STRUCTURES; RESPONSE MODIFICATION; SEISMIC APPLICATIONS; MECHANICAL-BEHAVIOR; FATIGUE BEHAVIOR; BUILDINGS; TENSION; STRESS; WIRES;

D O I：

10.1016/j.conbuildmat.2020.121712

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

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. (C) 2020 Elsevier Ltd. All rights reserved.

引用

页数：14

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