Shape Memory Alloys: Modeling and Engineering Applications in Civil Engineering
Deadline for manuscript submissions: closed (1 July 2021) | Viewed by 560
Interests: shape memory alloys structures; smart materials; reinforced composites; manufacturing technology
Special Issues, Collections and Topics in MDPI journals
Shape memory alloys (SMAs) are rising as a smart material in mechanical, aerospace, and civil engineering. The unique properties of the SMAs are shape memory effect and superelasticity. Both are very useful to realize smart devices with self-centering, self-curing of cementitious materials, and seismic retrofits. NiTi SMAs have been generally used because of their good mechanical properties, such as wide recovery strain range, superelastic behavior with large strain, excellent resistance to corrosion and fatigue. However, because of high costs, Fe-based SMAs have recently been introduced for civil applications with lower cost and high recovery stress compared with the NiTi SMAs.
The SMAs are used in various shapes such as wires, short fibers, cables, plates, bars, or special shapes of rings or coil springs. They are used separately to compose smart devices or dampers and can be embedded in materials made of concrete/mortar or plastic to enhance performance or to improve the material properties. Thus, they can be placed into inner or outer materials with various combinations.
Behavior of the SMAs is usually asymmetric in tension and compression, and the modeling of the behavior is continuously studied. Usually used symmetric models of the superelasticity cannot describe exactly the hysteretic behavior of the SMAs. Mathematical models of superelastic or martensitic SMAs are being tried to describe exact hysteretic behavior.
SMA studies are a hot topic in civil engineering, and thus it is our great pleasure to invite you to submit a manuscript for this Special Issue.
Prof. Eunsoo Choi
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- Shape memory alloys
- Shape memory effect
- Smart devices
- Fe-based SMAs