The principles of shape-memory alloys (SMAs) are described and their innovative use in SMA springs, used to ensure a constant air gap between fabric layers in intelligent heat- or cold-protective clothing is explored. Springs made from nitinol have a two-way shape-memory effect in both hot and cold environments, enabling sensing, actuating, and controlling of the microclimate temperature of the clothing system without any external power supply. The effects of concentration of Ni and Ti, treatment temperature and time, wire diameter, spring diameter and the pitches of the springs, are examined in terms of the sensing and actuating temperature and thickness of the air gap. A human-clothing-environment simulator is described.
|Title of host publication||Protective Clothing|
|Subtitle of host publication||Managing Thermal Stress|
|Number of pages||31|
|Publication status||Published - 2014 Aug 1|
Bibliographical noteFunding Information:
The author wishes to thank Dr. Kwang Ku Jee, Korea Institute of Science and Technology for his help, information and knowledge to make SMA springs. The novel approaches were made possible by the endeavored lab works of J. Yeo, S. Hwang, J. Lee, B. Baik, H. Park and G. Park at Yonsei University and collaboration with Dr. S Yoo at Kyunghee University. Information, data and graphs were excerpted from their theses and works. This research was supported by the National Research Foundation of Korea, Grant No. 313-2008-2-C00995.
© 2014 Elsevier Ltd All rights reserved.
All Science Journal Classification (ASJC) codes
- Materials Science(all)