Shape memory materials for electrically-powered soft machines

2020 ◽  
Vol 8 (21) ◽  
pp. 4539-4551 ◽  
Author(s):  
Xiaonan Huang ◽  
Michael Ford ◽  
Zach J. Patterson ◽  
Masoud Zarepoor ◽  
Chengfeng Pan ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Recent Progress ◽  
Artificial Muscles ◽  
Liquid Crystal Elastomer ◽  
Shape Memory Materials

We review the recent progress of electrically-powered artificial muscles and soft machines using shape memory alloy and liquid crystal elastomer.

scholarly journals Shape Memory Alloy Artificial Muscles for Treatments of Fecal Incontinence

2004 ◽  
Vol 45 (2) ◽  
pp. 272-276 ◽  
Author(s):  
Yun Luo ◽  
Toshiyuki Takagi ◽  
Shintaro Amae ◽  
Motoshi Wada ◽  
Tomoyuki Yambe ◽  
...  
Keyword(s):  
Fecal Incontinence ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Artificial Muscles

On a Finger Model Actuated With Shape Memory Alloy Artificial Muscles

2003 ◽  
Author(s):  
Veturia Chiroiu ◽  
Ligia Munteanu ◽  
Traian Badea ◽  
Cornel Mihai Nicolescu
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Aluminum Matrix ◽  
Electrical Current ◽  
Longitudinal Axis ◽  
Damping Capacity ◽  
Artificial Muscles ◽  
Niti Wires ◽  
Finger Model ◽  
Start Temperature

The simulation of a flexible finger, actuated with the shape memory alloys (SMAs) artificial muscles, is presented in the paper. The finger is modeled as a cylindrically rod with three embedded NiTi wires in a n aluminum matrix. Forces between NiTi wires causes bending in any plane perpendicular to the longitudinal axis of the finger. The NiTi wires are heated above the austenitic start temperature by passing an electrical current, and the deflected wire tends to return to the initial configuration. Using characteristics of SMAs such as high damping capacity, super-elasticity, thermo-mechanical behavior and shape memory, the actuation for the finger is theoretically introduced and discussed.

High-Energy-Density Shape Memory Materials with Ultrahigh Strain for Reconfigurable Artificial Muscles

2021 ◽  
Author(s):  
Zheng Xu ◽  
Yujie Chen ◽  
Chi Chen ◽  
Zhen Chen ◽  
Yu Tong Guo ◽  
...  
Keyword(s):  
Energy Density ◽  
Shape Memory ◽  
High Energy ◽  
High Energy Density ◽  
Soft Robotics ◽  
Artificial Muscles ◽  
Flexible Devices ◽  
Shape Memory Materials ◽  
Ultrahigh Strain ◽  
Considerable Strain

Abstract Programmable and reconfigurable artificial muscles are highly promising and desirable for applications, including soft robotics, flexible devices, and biomedical devices. However, the combination of considerable strain and high energy...

scholarly journals Shape-Memory Polymeric Artificial Muscles: Mechanisms, Applications and Challenges

Molecules ◽  
2020 ◽  
Vol 25 (18) ◽  
pp. 4246 ◽  
Author(s):  
Yujie Chen ◽  
Chi Chen ◽  
Hafeez Ur Rehman ◽  
Xu Zheng ◽  
Hua Li ◽  
...  
Keyword(s):  
Shape Memory ◽  
Smart Materials ◽  
Recent Progress ◽  
Shape Memory Polymer ◽  
Shape Memory Polymers ◽  
Artificial Muscles ◽  
Linkage Design ◽  
Wide Range ◽  
Liquid Crystal Elastomers ◽  
Made In

Shape-memory materials are smart materials that can remember an original shape and return to their unique state from a deformed secondary shape in the presence of an appropriate stimulus. This property allows these materials to be used as shape-memory artificial muscles, which form a subclass of artificial muscles. The shape-memory artificial muscles are fabricated from shape-memory polymers (SMPs) by twist insertion, shape fixation via Tm or Tg, or by liquid crystal elastomers (LCEs). The prepared SMP artificial muscles can be used in a wide range of applications, from biomimetic and soft robotics to actuators, because they can be operated without sophisticated linkage design and can achieve complex final shapes. Recently, significant achievements have been made in fabrication, modelling, and manipulation of SMP-based artificial muscles. This paper presents a review of the recent progress in shape-memory polymer-based artificial muscles. Here we focus on the mechanisms of SMPs, applications of SMPs as artificial muscles, and the challenges they face concerning actuation. While shape-memory behavior has been demonstrated in several stimulated environments, our focus is on thermal-, photo-, and electrical-actuated SMP artificial muscles.

WRINKLING ATOP SHAPE MEMORY MATERIALS

2012 ◽  
Vol 19 (02) ◽  
pp. 1250010 ◽  
Author(s):  
L. SUN ◽  
Y. ZHAO ◽  
W. M. HUANG ◽  
H. PURNAWALI ◽  
Y. Q. FU
Keyword(s):  
Surface Tension ◽  
Surface Roughness ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Shape Memory Polymer ◽  
Patterned Surfaces ◽  
Advantages And Disadvantages ◽  
Different Types ◽  
Shape Memory Materials ◽  
Processing Techniques

Many surface related properties, such as surface roughness, surface tension and reflection etc are heavily dependent on the surface morphology of materials. Patterned surfaces may have significant effects on these properties. In this paper, we compare wrinkles produced atop three different types of shape memory materials, namely, shape memory alloy, shape memory polymer and shape memory hybrid. We show the advantages and disadvantages of them in terms of the processing techniques and the resultant wrinkle patterns.

Long Liquid Crystal Elastomer Fibers with Large Reversible Actuation Strains for Smart Textiles and Artificial Muscles

2019 ◽  
Vol 11 (21) ◽  
pp. 19514-19521 ◽  
Author(s):  
Devin J. Roach ◽  
Chao Yuan ◽  
Xiao Kuang ◽  
Vincent Chi-Fung Li ◽  
Peter Blake ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Artificial Muscles ◽  
Smart Textiles ◽  
Liquid Crystal Elastomer

Shape Memory Alloy Materials and Exercise-Induced Bone Injury

2013 ◽  
Vol 454 ◽  
pp. 257-262
Author(s):  
Jian Wei Zhou ◽  
Jiang Yuan Hou ◽  
Yong Tao Shi
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Sports Injuries ◽  
Special Functions ◽  
Nickel Titanium ◽  
Initial Shape ◽  
Bone Injury ◽  
Novel Material ◽  
Shape Memory Materials ◽  
Exercise Induced

Shape memory materials are materials with special functions set of sensing and actuation in one. The shape memory alloy is one of the most important materials in shape memory materials. Shape memory alloy is a kind of alloy that alloy with initial shape in low temperature by the plastic deformation and fixed into another shape, by heating to a temperature above the critical, can be restored into the initial shape. The characteristic of shape memory alloy mainly has the shape memory effect and super elastic effect. Nickel titanium memory alloy is not used in the fracture of limbs, in recent years are also used in the spine and femoral head fracture. Nickel titanium memory alloy has good biocompatibility, and has the characteristics of super elasticity, low magnetic, wear resistance, fatigue resistance, corrosion resistance, as a novel material for internal fixation in the treatment of sports injuries are widely used.

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