shape memory alloy actuators
Finite Element Simulations of Shape Memory Alloy Actuators in Adaptive Structures
... of shape memory alloys (SMA) make them viable as actuators in many applications, particularly those that are weight critical, that are used in ‘clean-room’ environments, or that require a high force ...
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Shape Memory Alloy Actuators and Sensors for Applications in Minimally Invasive Interventions
... surgical system (Intu- itive Surgical Inc., Mountain View, CA) [8]. This is a commercially available system that has been approved by the U.S. Food and Drug Administration (FDA) for several minimally inva- sive ...
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Characterization and Predictive Output Behavior of Shape Memory Alloy
... of Shape memory alloy actuators can be increased at the expense of recovery force via heat treatment to form compressed springs in their heat-activated austenite phase to perform mechanical ...
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Recent Advancement in Shape Memory Alloy
... SMM thin films evolved from the advancement of fabrication technology, where SMMs are deposited directly onto micromachined materials or as stand-alone thin films to become micro- actuators. Moreover, in the ...
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Radiation effect on shape memory alloy
... of shape memory alloy to accurate between two shapes at higher temperature and at lower temperature with displacement and lift specific weight allow this material to be good actuators and ...
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A Measurement System for Shape Memory Alloy Wire Actuators
... The actuation currents of 200 mA and below did not produce any appreciable strains. For instance, the maximum strain was limited to 0.62 % for the actuation current of 200 mA. The reason for very low strains for this ...
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Patterned Shape Memory Alloy Films
... Ni–Ti shape memory alloy (SMA) films is of technological interest for micro- actuators in micro-electro-mechanical systems (MEMS) and has thus received wide ...
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Mini Robot Fingers using Shape Memory Alloy
... non-classical types of actuation which allow the development of efficient, compact, lightweight and low- cost actuators. The robot fingers before are following the actual size of human hand. Therefore, that hand ...
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Confection and Assessment of a Dynamic Orthotics Using a Nitinol Alloy
... with shape memory are materials that undergo a deformation after, have the ability to return to its size and shape when subjected to an appropriate heat ...nickel-titanium alloy (NiTi) that ...
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A Review on Shape Memory Alloy (SMA) Hybrid Composite
... [2] D. Bollas, et al. they have investigated the ability of single SMA wires to act as internal stress generators in fibrous polymer composite systems. The stress fields recorded both at the specimen level and internally ...
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Future of shape memory alloy and its utilization
... SMA actuators are typically actuated electrically, where an electric current results in Joule ...SMA actuators include the use of a conductive ...2012) Shape memory alloys (SMAs) are metals ...
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Fabrication of NiTi shape memory alloy by Micro-FAST
... TiNi alloy is widely applied and demands on miniature/micro-metal-products increase significantly, a new rapid powder consolidation technology, called Micro-FAST (combining micro- forming and electric-current ...
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Macroscopic Models for Shape Memory Alloy Characterization and Design
... In this chapter, we derive a stress-strain law to model the superelastic response of SMAs in thermodynamic equilibrium. Shape memory mechanisms in SMAs are caused by first-order martensitic phase ...
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Progress on Composites with Embedded Shape Memory Alloy Wires
... stress and finally becomes fully oriented martensite (c). Upon cooling, the parent phase transforms into SAM, and the fully oriented martensite remains unchanged. In the second and the following constrained thermal ...
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Free Energy Density of the Shape Memory Alloy AuZn
... The total free energy is given by F ¼ FðQÞ þ FðeÞ þ FðQ; eÞ, where FðQÞ is the shuffle free energy (responsible for unit cell tripling along all the three directions and relative displacements between the gold and zinc ...
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A Study of the effects of strain on NiTi shape memory alloy
... Index of Figures 3 Figure 1 Shape Memory Process Figure 2 Diagram of phases as NiTi is heated and Figure 3 Lattice Parameters of a Crystal System Figure 4 Crystal Strucure of NiTi Figure[r] ...
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Inherent Internal Friction of Ti51Ni39Cu10 Shape Memory Alloy
... 1) C. M. Wayman and T. W. During: Engineering Aspects of Shape Memory Alloys, T. W. During, K. N. Melton, D. Sto¨ckel and C. M. Wayman (Eds.), (Butterworth-Heinemam, London, 1990), pp. 3–20. 2) K. Iwasaki ...
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Shape Memory Effect and Crystallographic Investigation in VN Containing Fe Mn Si Cr Alloys
... the alloy. It is also precious to identify the shape or the shape change of the ...octahedron shape of precipitates, which are occasionally truncated at their edges to minimize the effect of ...
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Electromagnetic and thermal analyses of high performance magnetic shape memory actuators for valve applications
... AGNETIC shape memory (MSM) effect exhibited by certain materials at room temperature is known for almost 20 years ...in shape) depending on microstructure ...in actuators and ...MSM-based ...
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Effect of Shape Memory Heat Treatment on Microstructures and Mechanical Properties of Powder Metallurgy TiNi Shape Memory Alloy
... not con fi rmed by the SEM observation of the material after SMHT on the holding time 030 min, though it was found that both high plateau stress and high shape recovery rate were achieved from the result of ...
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