Recent advances in the applications of shape memory alloys in civil infrastructures: A review

Zareie, Shahin; Issa, Anas; Seethaler, Rudolf; Zabihollah, Abolghassem

doi:10.1016/j.istruc.2020.05.058

Cited by 119 publications

(44 citation statements)

References 120 publications

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“…Higher strains can be obtained with special geometries such as helix or zigzag but with lower stresses. Due to their excellent properties, SMAs are widely used in aerospace, mechatronics, biomedicine, bridge construction, automobiles, and daily life [33].…”

Section: Smasmentioning

confidence: 99%

Wearable Actuators: An Overview

Chen

Yang

et al. 2021

Textiles

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The booming wearable market and recent advances in material science has led to the rapid development of the various wearable sensors, actuators, and devices that can be worn, embedded in fabric, accessorized, or tattooed directly onto the skin. Wearable actuators, a subcategory of wearable technology, have attracted enormous interest from researchers in various disciplines and many wearable actuators and devices have been developed in the past few decades to assist and improve people’s everyday lives. In this paper, we review the actuation mechanisms, structures, applications, and limitations of recently developed wearable actuators including pneumatic and hydraulic actuators, shape memory alloys and polymers, thermal and hygroscopic materials, dielectric elastomers, ionic and conducting polymers, piezoelectric actuators, electromagnetic actuators, liquid crystal elastomers, etc. Examples of recent applications such as wearable soft robots, haptic devices, and personal thermal regulation textiles are highlighted. Finally, we point out the current bottleneck and suggest the prospective future research directions for wearable actuators.

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Section: Smasmentioning

confidence: 99%

Wearable Actuators: An Overview

Chen

Yang

et al. 2021

Textiles

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show abstract

“…Higher strains can be obtained by special geometries like helix or zigzag but with lower stresses. Due to their excellent properties, SMAs are widely used in aerospace, mechatronics, biomedicine, bridge construction, automobile industry and daily life [33].…”

Section: Smasmentioning

confidence: 99%

Wearable Actuators: An Overview

Chen¹,

Yang²,

Li³

et al. 2021

Preprint

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The booming wearable market and recent advances in material science has led to the rapid development of the various wearable sensors, actuators, and devices that can be worn, embedded in fabric or accessories, or tattoos directly onto the skin. Wearable actuators, a subcategory of wearable technology, have attracted enormous interest from researchers in various disciplines and many wearable actuators and devices have been developed in the past few decades to assist and improve people's everyday lives. In this paper, we review the actuation mechanisms, structures, applications, and limitations of recently developed wearable actuators including pneumatic and hydraulic actuators, shape memory alloys and polymers, thermal and hygroscopic materials, dielectric elastomers, ionic and conducting polymers, piezoelectric actuators, electromagnetic actuators, liquid crystal elastomers, etc. Examples of the recent applications such as wearable soft robots, haptic devices, and personal thermal regulation textiles are highlighted. Finally, we point out the current bottleneck and suggest the prospective future research directions for wearable actuators.

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“…Shape memory alloys (SMAs) are broadly used in the development of thermostatic and electromechanical actuators, to perform mechanical actions assisted by temperature change phenomena via electric currents. To improve the robustness, the compact and straightforward design strategy was usually adopted [9][10][11]. Amongst various type of SMAs, nickel-titanium (NiTi)-based SMAs (commonly known as NiTi) are preferably used in most smart engineering structures and actuator technologies due to their exceptional thermo-mechanical performances, practicability, shape memory characteristics, and pseudoelasticity [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

An Intermetallic NiTi-Based Shape Memory Coil Spring for Actuator Technologies

Shimoga

Kim

2021

Metals

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Amongst various intermetallic shape memory alloys (SMAs), nickel–titanium-based SMAs (NiTi) are known for their unique elastocaloric property. This widely used shape remembering material demonstrates excellent mechanical and electrical properties with superior corrosion resistance and super-long fatigue life. The straight-drawn wire form of NiTi has a maximum restorable strain limit of ~4%. However, a maximum linear strain of ~20% can be attained in its coil spring structure. Various material/mechanical engineers have widely exploited this superior mechanic characteristic and stress-triggered heating/cooling efficiency of NiTi to design smart engineering structures, especially in actuator technologies. This short technical note reflects the characteristics of the NiTi coil spring structure with its phase transformations and thermal transformation properties. The micro-actuators based on NiTi have been found to be possible, suggesting uses from biomedical to advanced high-tech applications. In recent years, the technical advancements in modular robotic systems involving NiTi-based SMAs have gained speculative commercial interest.

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Recent advances in the applications of shape memory alloys in civil infrastructures: A review

Cited by 119 publications

References 120 publications

Wearable Actuators: An Overview

Wearable Actuators: An Overview

Wearable Actuators: An Overview

An Intermetallic NiTi-Based Shape Memory Coil Spring for Actuator Technologies

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