Effect of shape memory alloy on impact damage behavior and residual properties of glass/epoxy laminates under low temperature

2009 ◽  
Vol 88 (3) ◽  
pp. 455-460 ◽  
Author(s):  
Ki-Weon Kang ◽  
Jung-Kyu Kim
Keyword(s):  
Low Temperature ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Impact Damage ◽  
Damage Behavior ◽  
Residual Properties

scholarly journals Shape memory alloy engine for high efficiency low-temperature gradient thermal to electrical conversion

2019 ◽  
Vol 251 ◽  
pp. 113277 ◽  
Author(s):  
Prashant Kumar ◽  
Ravi Anant Kishore ◽  
Deepam Maurya ◽  
Colin J. Stewart ◽  
Reza Mirzaeifar ◽  
...  
Keyword(s):  
Low Temperature ◽  
Temperature Gradient ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
High Efficiency

Increased impact damage resistance of shape memory alloy composites

2001 ◽  
Author(s):  
Kelly A. Tsoi ◽  
Rudy Stalmans ◽  
Martine Wevers ◽  
Jan Schrooten ◽  
Yiu-Wing Mai
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Impact Damage ◽  
Damage Resistance

Low-Power, Minimal-Heat Exposure Shape Memory Alloy (SMA) Actuators for On-Body Soft Robotics

2019 ◽  
Author(s):  
Simon Ozbek ◽  
Esther Foo ◽  
J. Walter Lee ◽  
Nicholas Schleif ◽  
Brad Holschuh
Keyword(s):  
Low Temperature ◽  
Shape Memory Alloy ◽  
Low Power ◽  
Shape Memory ◽  
Room Temperature ◽  
Dynamic Compression ◽  
Heat Exposure ◽  
The Body ◽  
Compression Garments ◽  
Sma Actuators

In the world of soft-robotic medical devices, there is a growing need for low profile, non-rigid, and lower power actuators for soft exoskeletons and dynamic compression garments. Advanced compression garments with integrated shape memory materials have been developed recently to alleviate the functional and usability limitations associated with traditional compression garments. These advanced garments use contractile shape memory alloy (SMA) coil actuators to produce dynamic compression on the body through selective heating of the SMA material. While these garments can create spatially- and temporally-controllable compression, typical SMA materials (e.g., 70°C Flexinol) consume considerable power and require considerable thermal insulation to protect the wearer during the heating phase of the SMA actuation. Alternative SMA materials (e.g., NiTi #8 by Fort Wayne Metals, Inc.) transform below room temperature and do so using no applied electrical power and generate no waste heat. However, these materials are challenging to dynamically control and require active refrigeration to reset to material. In theory, low-temperature SMA actuators made from materials like NiTi #8 may maintain additional dynamic actuation capacity once equilibrated to room temperature (i.e., the material may not fully transform), as the SMA phase transformation temperature window expands when the material experiences applied stress. This paper investigates this possibility: we manufactured and tested low-temperature NiTi coil actuators to determine the magnitude of the additional force that can be generated via Joule heating once the material has equilibrated to room temperature. SMA spring actuators made from NiTi #8 consumed 84% less power and stabilized at significantly lower temperatures (26.0°C vs. 41.2°C) than SMA springs made from 70°C Flexinol, when actuated at identically fixed displacements (100% nominal strain) and when driven to produce equal forces (∼3.35N). This demonstration of low-power, minimal-heat exposure SMA actuation holds promise for many future wearable actuation applications, including dynamic compression garments.

Impact Damage Resistance of Glass/Epoxy Laminates with Embedded Shape Memory Alloy

2007 ◽  
pp. 1529-1532
Author(s):  
Ki Weon Kang ◽  
H.J. Kim ◽  
J.H. Kim ◽  
Heung Seob Kim ◽  
Yong Su Kim ◽  
...  
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Impact Damage ◽  
Damage Resistance
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