Pyroshock Attenuation using 3-axis Hybrid Mesh Isolators with the Application of Pseudoelastic SMA Wire
- Paper number
IAC-10.C2.5.14
- Author
Dr. Se-Hyun Youn, Korea Aerospace Research Institute, Korea, Republic of
- Coauthor
Mr. Ho-Kyeong Jeong, Korea Aerospace Research Institute, Korea, Republic of
- Coauthor
Dr. Young-Soon Jang, Korea Aerospace Research Institute, Korea, Republic of
- Coauthor
Dr. Yeong-Moo Yi, Korea Aerospace Research Institute, Korea, Republic of
- Year
2010
- Abstract
In general, severe pyroshocks are imposed to the launch vehicle and satellite during the separation phases such as stage separation, fairing separation and satellite separation. These pyroshocks could generate malfunctions of electric components equipped in launch vehicle or satellite and could result in a catastrophic failure of launch operation. A new compressed mesh isolator called “3-axis hybrid mesh isolator” was introduced in this paper for the prevention of these malfunctions. 3-axis hybrid mesh isolator was manufactured by mixing pseudoelastic SMA wire and general metal wire for the improvement of the pyroshock isolation performance. Nonlinear hysteretic loading characteristic of general mesh structure effectively dissipates vibration and shock energy, moreover, pseudoelastic effect of SMA wire absorbs energy significantly due to the stress-induced phase transformation. Quasi-static loading tests were performed to confirm the isolation capability, and test results (load-displacement relationship) showed nonlinear hysteretic curve which assures the dominant absorption capability of the vibration and shock energy. Through pyroshock performance tests, it was shown that the 3-axis hybrid mesh isolator has the ability of remarkable shock attenuation due to the pseudoelastic effect of SMA wire with the hysteretic characteristic of mesh structure itself. From several verification tests, 3-axis hybrid mesh isolators showed outstanding isolation performance and these isolators were confirmed to be very effective for the isolation of severe pyroshock.
- Abstract document
- Manuscript document
IAC-10.C2.5.14.pdf (🔒 authorized access only).
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