Study of machinability aspects of shape memory alloys: A critical review

Kumari, Soni; Dinbandhu,; Abhishek, Kumar

doi:10.1016/j.matpr.2020.11.390

Cited by 20 publications

(7 citation statements)

References 45 publications

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“…SMA is a specific alloy that, after being deformed, can return to its initial shape when heated [66,67]. As shown in Figure 2, the effects of the shape changes can be categorised into three types: one-way shape memory effect (OWSME), two-way shape memory effect (TWSME), and pseudo-elasticity [68,69]. Under a certain temperature, stress, and strain, SMA can exhibit two different phases, three different crystal structures (detwinned martensite, austenite, and twinned martensite), and six possible transformations [70].…”

Section: Shape Memory Alloy (Sma)mentioning

confidence: 99%

Actuation Mechanisms and Applications for Soft Robots: A Comprehensive Review

Liu

2023

Applied Sciences

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Soft robots, which exhibit distinguishing features in terms of compliance, adaptability, and safety, have been expansively adopted in various niche applications. For soft robots, innovative actuators have been designed based on smart materials enabling the robots to perform flexible and versatile functions, whereas extra spaces and accessories to accommodate motors and power devices have been eliminated to achieve structural optimisation. Herein, different types of actuation mechanisms for soft robots are summarised to reflect the state-of-the-art research and applications. Major characteristics of the actuation mechanisms are updated. Design methodologies of the actuation mechanisms are discussed in detail. Furthermore, their advantages, disadvantages, and application potential are compared and summarised. In the end, based on our knowledge and understanding, new thoughts and recommendations to further develop the actuation mechanisms are put forward. This review is useful to support the conclusion that, through incorporating actuation mechanisms and advanced intelligent technologies, soft robots tend to create disruptive innovations in applications.

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Section: Shape Memory Alloy (Sma)mentioning

confidence: 99%

Actuation Mechanisms and Applications for Soft Robots: A Comprehensive Review

Liu

2023

Applied Sciences

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“…These materials present innovative solutions for biomedicine, wearable devices, and other related applications. In addition, a number of researches have been carried out to further enhance the material properties, such as the development of self-healing [ 45 ], shape-memory [ 46 ], and stimuli-responsive materials [ 47 ]. Also, researchers investigated hybrid materials based on metallic, polymeric, and organic materials to create multifunctional devices with superior performance.…”

Section: Materials Synthesismentioning

confidence: 99%

Electric Double Layer Based Epidermal Electronics for Healthcare and Human-Machine Interface

et al. 2023

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Epidermal electronics, an emerging interdisciplinary field, is advancing the development of flexible devices that can seamlessly integrate with the skin. These devices, especially Electric Double Layer (EDL)-based sensors, overcome the limitations of conventional electronic devices, offering high sensitivity, rapid response, and excellent stability. Especially, Electric Double Layer (EDL)-based epidermal sensors show great potential in the application of wearable electronics to detect biological signals due to their high sensitivity, fast response, and excellent stability. The advantages can be attributed to the biocompatibility of the materials, the flexibility of the devices, and the large capacitance due to the EDL effect. Furthermore, we discuss the potential of EDL epidermal electronics as wearable sensors for health monitoring and wound healing. These devices can analyze various biofluids, offering real-time feedback on parameters like pH, temperature, glucose, lactate, and oxygen levels, which aids in accurate diagnosis and effective treatment. Beyond healthcare, we explore the role of EDL epidermal electronics in human-machine interaction, particularly their application in prosthetics and pressure-sensing robots. By mimicking the flexibility and sensitivity of human skin, these devices enhance the functionality and user experience of these systems. This review summarizes the latest advancements in EDL-based epidermal electronic devices, offering a perspective for future research in this rapidly evolving field.

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“…This configuration allows for linear movement in constrained spaces and provides significant force in comparison to the size and weight of the actuator [ 54 ]. There are several drawbacks to this kind of actuator, such as the low-speed response related to the thermoelectrical phenomenon that imposes important challenges on the control of the devices where they are applied [ 55 , 56 , 57 , 58 ].…”

Section: Introductionmentioning

confidence: 99%

Snake Robot with Motion Based on Shape Memory Alloy Spring-Shaped Actuators

Cortez,

Sandoval-Chileño,

Lozada-Castillo

et al. 2024

Biomimetics

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This study presents the design and evaluation of a prototype snake-like robot that possesses an actuation system based on shape memory alloys (SMAs). The device is constructed based on a modular structure of links connected by two degrees of freedom links utilizing Cardan joints, where each degree of freedom is actuated by an agonist–antagonist mechanism using the SMA spring-shaped actuators to generate motion, which can be easily replaced once they reach a degradation point. The methodology for programming the spring shape into the SMA material is described in this work, as well as the instrumentation required for the monitoring and control of the actuators. A simplified design is presented to describe the way in which the motion is performed and the technical difficulties faced in manufacturing. Based on this information, the way in which the design is adapted to generate a feasible robotic system is described, and a mathematical model for the robot is developed to implement an independent joint controller. The feasibility of the implementation of the SMA actuators regarding the motion of the links is verified for the case of a joint, and the change in the shape of the snake robot is verified through the implementation of a set of tracking references based on a central pattern generator. The generated tracking results confirm the feasibility of the proposed mechanism in terms of performing snake gaits, as well as highlighting some of the drawbacks that should be considered in further studies.

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Study of machinability aspects of shape memory alloys: A critical review

Cited by 20 publications

References 45 publications

Actuation Mechanisms and Applications for Soft Robots: A Comprehensive Review

Actuation Mechanisms and Applications for Soft Robots: A Comprehensive Review

Electric Double Layer Based Epidermal Electronics for Healthcare and Human-Machine Interface

Snake Robot with Motion Based on Shape Memory Alloy Spring-Shaped Actuators

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