Filters








561 Hits in 7.4 sec

Multi-Objective Design Optimization of a Shape Memory Alloy Flexural Actuator

Casey D. Haigh, John H. Crews, Shiquan Wang, Gregory D. Buckner
2019 Actuators  
This paper presents a computational model and design optimization strategy for shape memory alloy (SMA) flexural actuators.  ...  Actuator behavior is modeled using the homogenized energy framework, and the effects of two critical design parameters (initial SMA curvature and flexural rigidity of the elastic sleeve) on activation  ...  The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, and in the decision to publish the results.  ... 
doi:10.3390/act8010013 fatcat:unvzbyncordgpfuqoq3cda2n5e

Design Concepts for NiTiNOL Wires to Function as a Sensor

D. Josephine Selvarani Ruth
2021 Transactions of Indian National Academy of Engineering  
AbstractNickel Titanium Naval Ordinance Laboratory (NiTiNOL) is widely called as a shape memory alloy (SMA), a class of nonlinear smart material inherited with the functionally programmed property of varying  ...  The major challenge to instrument the SMA wires is to suppress the wires' nonlinearity by proper selection of two important factors.  ...  Introduction A shape-memory alloy (SMA, smart metal, memory metal, memory alloy, muscle wire, smart alloy) is a class of smart material that has been receiving increasing attention in recent years owing  ... 
doi:10.1007/s41403-021-00200-7 fatcat:6nookh3qynbsbdpsapxl4vfkuq

High Resolution Actuators

Mathieu Grossard, Micky Rakotondrabe
2016 Actuators  
High-resolution actuators have been used for many decades for the development of actuators in different applications, such as robotics for micro-or macro-scale manipulation and assembly, scanning probe  ...  Keywords: novel actuators for mechatronic systems; design, modeling and control of actuators; smart materials-based actuators Driven by increasing societal, economic, and technological pressures, high-resolution  ...  Acknowledgments: The guest editors address their thanks to all the authors for their collaboration and contributions to this Special Issue.  ... 
doi:10.3390/act5020018 fatcat:mwbg742bejfrhckgsuo44y4q4e

Modeling of smart concrete beams with shape memory alloy actuators

S. Malagisi, S. Marfia, E. Sacco, J. Toti
2014 Engineering structures  
In the present work, a computational strategy for the modeling of reinforced concrete beams with shape memory alloy (SMA) actuators for flexural cracks repair is developed.  ...  A uniaxial SMA model able to reproduce both the pseudo-elastic behavior and the shape memory effect is adopted for the reinforcing SMA wires.  ...  A particular type of smart concrete, widely studied and experimentally investigated, is the smart concrete obtained adding Shape Memory Alloy (SMA) bars.  ... 
doi:10.1016/j.engstruct.2014.05.035 fatcat:dnix74vvkvbf3ctdoaphfuedfi

Review of Shape Memory Alloys applications in civil structures, and analysis for its potential as reinforcement in concrete flexural members

Debbarma
2012 International Journal of Civil and Structural Engineering  
This paper synthesizes information on the properties of Shape Memory Alloys (SMAs) and its useful aspect towards utilization in civil engineering structures.  ...  Finally, a new scope of experimental research work is proposed utilizing SMAs as reinforcement in RC flexural members to minimize instantaneous & long-term deflections.  ...  Corrosion resistant Fe-Mn-Si-Cr rods were used to enhance the Review of Shape Memory Alloys applications in civil structures, and analysis for its potential as reinforcement in concrete flexural members  ... 
doi:10.6088/ijcser.00202030020 fatcat:3l4r4osiorebxeikzqugcdxnte

Shape Memory Alloys as Linear Drives in Robot Hand Actuation

Gerrit Lange, Andreas Lachmann, Abdul Hakim Abdul Rahim, Muhammad Hussain Ismail, Cheng Yee Low
2015 Procedia Computer Science  
The applicability of shape memory alloy as an actuator for robotic hands is tested.  ...  An adaptive PID controller shows best results for the full range of motion.  ...  Therefore, a test for the implementation and control of an SMA driven hand was conducted. The Shape Memory Alloy or SMA has been introduced as an actuator in the 1950s.  ... 
doi:10.1016/j.procs.2015.12.335 fatcat:whophgelxnep7njktclskykgym

Mechanical Properties and Nondestructive Testing of Advanced Materials

Yan Yang, Xing Chen, Young Soo Choi
2013 Advances in Materials Science and Engineering  
Sixteen papers are invited herein to demonstrate the research on various advanced materials, such as shape memory alloy (SMA) and bamboo fibers.  ...  alloys, and polymers.  ...  In the study "Characteristics analysis and testing of SMA spring actuator, " authors have discussed the shape memory alloy spring working as actuator and studied its displacement versus temperature by  ... 
doi:10.1155/2013/589320 fatcat:i4sat2iqu5bahhzioqglvrxukm

Review on Shape Memory Materials

Maurizio Mor, V. Murgul
2016 MATEC Web of Conferences  
In this work, the author tries to trace a route of shape memory materials from their definition, in terms of experimental observation and physical model to the application, especially in mechanical actuators  ...  and in device adopting this type of actuators.  ...  Based on the isostrain loading and unloading experimental data of SMA (shape memory alloy), the van der Pol cycle model was used to characterize the hysteretic nonlinearity of material.  ... 
doi:10.1051/matecconf/20165301061 fatcat:6fcycxpvr5b7paqowgn3xi7u6q

A review on shape memory alloys with applications to morphing aircraft

S Barbarino, E I Saavedra Flores, R M Ajaj, I Dayyani, M I Friswell
2014 Smart materials and structures (Print)  
In this review, we focus on the use of shape memory alloys in the context of morphing aircraft, with particular emphasis on variable twist and camber, and also on actuation bandwidth and reduction of power  ...  Shape memory alloys (SMAs) are a unique class of metallic materials with the ability to recover their original shape at certain characteristic temperatures (shape memory effect), even under high applied  ...  Acknowledgments EI Saavedra Flores acknowledges support from Department of Civil Engineering, University of Santiago, Chile, and also from the National Commission for Scientific and Technological Research  ... 
doi:10.1088/0964-1726/23/6/063001 fatcat:h3ehoxvsq5a7ldkehu6h5gp3t4

A SMA HIGH PERFORMANCE ACTUATOR FOR ROBOT HANDS

D. REYNAERTS, H. van BRUSSEL
1991 Journal de Physique IV : Proceedings  
This paper proposes a prototype of a high performance robotic actuator, based on shape memory alloys. The actuator prototype was designed for generating a torque of 75 Nmm.  ...  Finally, the first experimental results for this prototype are presented.  ...  ACKNOWLEDGEMENT The authors wish to tha* J.Colmyt and L.Speeleveld for their contribution to this research.  ... 
doi:10.1051/jp4:1991424 fatcat:7j57tef67jdjviv3n7mosb67fu

A multi-layered variable stiffness device based on smart form closure actuators

M Henke, G Gerlach
2015 Journal of Intelligent Materials Systems and Structures  
Those actuators are either driven by electroactive polymers (EAPs) or shape memory alloy (SMA) wires. They control the area moment of inertia of the multi-layered bending structures.  ...  To enable a proper stiffness control, reliable actuators with high actuation capabilities based on smart materials are used.  ...  This contradiction can be solved by using smart materials such as electroactive polymers (EAPs) and shape memory alloys (SMAs) (Henke et al., 2012a (Henke et al., ,b, 2013)) .  ... 
doi:10.1177/1045389x15577645 fatcat:rlr7fnqhwzbgdjxum5zz5d3wcu

Review of Neural Network Modeling of Shape Memory Alloys

Rodayna Hmede, Frédéric Chapelle, Yuri Lapusta
2022 Sensors  
Shape memory alloys (SMAs) are largely used members of this family and have been innovatively employed in various fields, such as sensors, actuators, robotics, aerospace, civil engineering, and medicine  ...  After summarizing the general characteristics of ANNs and SMAs, we analyze various ANN types used for modeling the properties of SMAs according to their shapes, e.g., a wire as an actuator, a wire with  ...  Magnetic SMA System As a recent new application [90] , a magnetic shape memory alloy (MSMA)-based actuator was studied, and its nonlinear hysteresis behavior was modeled.  ... 
doi:10.3390/s22155610 pmid:35957170 fatcat:yek64y7bdjcljolhfkskrexfta

Control Aspects of Shape Memory Alloys in Robotics Applications: A Review over the Last Decade

Deivamoney Josephine Selvarani Ruth, Jung-Woo Sohn, Kaliaperumal Dhanalakshmi, Seung-Bok Choi
2022 Sensors  
This paper mainly focuses on various types of robots driven or actuated by shape memory alloy (SMA) element in the last decade which has created the potential functionality of SMA in robotics technology  ...  The wide spectrum of increasing use of SMA in the development of robotic systems is due to the increase in the knowledge of handling its functional characteristics such as large actuating force, shape  ...  A gecko-like gripper [75] that uses series shape memory alloy (SMA) wire for actuation was created.  ... 
doi:10.3390/s22134860 pmid:35808360 pmcid:PMC9269604 fatcat:4hw4qb4mbnemtjjaevez6fq45e

Aerospace applications of shape memory alloys

D J Hartl, D C Lagoudas
2007 Proceedings of the Institution of Mechanical Engineers. Part G, Journal of Aerospace Engineering  
To begin, a general overview of shape memory alloys is provided. The useful properties and engineering effects of SMAs are described and the methods in which these may be utilized are discussed.  ...  This article reviews the class of active materials known as Shape Memory Alloys (SMAs), especially as implemented in aerospace applications.  ...  Structures for Aerospace Vehicles (TiiMS) funded by NASA Cooperative Agreement No.  ... 
doi:10.1243/09544100jaero211 fatcat:mgsgqfugpbglld3eqgi2cax75m

A LOW COST MACRO-MICRO POSITIONING SYSTEM WITH SMA-ACTUATED MICRO STAGE

Eric Ho, Rob Gorbet
2007 Transactions of the Canadian Society for Mechanical Engineering  
Other smart materials offer the potential for lightweight, continuous actuation over small ranges, and hence may be useful in micro-positioning applications.  ...  The micro stage is driven by an NM70 SMA actuator from NanoMuscle. Macro and micro stages are modelled and controllers developed, and experimental system performance is evaluated.  ...  Shape memory alloys (SMAs) may offer a viable alternative to piezos in positioning applications with such precision requirements, at a fraction of the cost.  ... 
doi:10.1139/tcsme-2007-0005 fatcat:golc573l6bgstdljrqxc4f4jym
« Previous Showing results 1 — 15 out of 561 results