Abstract
Wireless sensor nodes self-powering from an ambient energy source have been widely studied. In particular, the piezoelectric energy harvesting has been the focus of attention, due to its high energy density. For the piezoelectric energy harvesting, a cantilever beam structure has normally been used because of its high efficiency. Since the frequency of environmental vibrations is of the order of hundreds of Hz, which is far below the natural frequency of cantilever type ceramic actuators, the frequency of the cantilever has commonly been adjusted by placing a heavy mass on its end. In order to lower its natural frequency and increase its safety factor, we fabricated a flexible piezoelectric cantilever, which was composed of ceramic on a flexible substrate. However, it was observed that the flexible cantilever was always broken at a certain position. This result indicates that the stress was not homogeneous, and concentrated at the breakage point of the ceramic. To analyze the failure of the ceramic, we measured the inhomogeneous stress distribution on the flexible piezoelectric energy harvester and analyzed it using the ATILA program.
| Original language | English |
|---|---|
| Pages (from-to) | 1074-1077 |
| Number of pages | 4 |
| Journal | Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan |
| Volume | 117 |
| Issue number | 1370 |
| Publication status | Published - 2009 Oct 1 |
Fingerprint
Keywords
- Cantilever
- Flexible energy harvester
- Piezoelectric energy harvesting
- Stress distribution
ASJC Scopus subject areas
- Chemistry(all)
- Ceramics and Composites
- Materials Chemistry
- Condensed Matter Physics
Cite this
Analysis of stress distribution in flexible piezoelectric energy harvester. / Song, Hyun Cheol; Kang, Chong-Yun; Yoon, Seok J.; Jeong, Dae Yong.
In: Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan, Vol. 117, No. 1370, 01.10.2009, p. 1074-1077.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Analysis of stress distribution in flexible piezoelectric energy harvester
AU - Song, Hyun Cheol
AU - Kang, Chong-Yun
AU - Yoon, Seok J.
AU - Jeong, Dae Yong
PY - 2009/10/1
Y1 - 2009/10/1
N2 - Wireless sensor nodes self-powering from an ambient energy source have been widely studied. In particular, the piezoelectric energy harvesting has been the focus of attention, due to its high energy density. For the piezoelectric energy harvesting, a cantilever beam structure has normally been used because of its high efficiency. Since the frequency of environmental vibrations is of the order of hundreds of Hz, which is far below the natural frequency of cantilever type ceramic actuators, the frequency of the cantilever has commonly been adjusted by placing a heavy mass on its end. In order to lower its natural frequency and increase its safety factor, we fabricated a flexible piezoelectric cantilever, which was composed of ceramic on a flexible substrate. However, it was observed that the flexible cantilever was always broken at a certain position. This result indicates that the stress was not homogeneous, and concentrated at the breakage point of the ceramic. To analyze the failure of the ceramic, we measured the inhomogeneous stress distribution on the flexible piezoelectric energy harvester and analyzed it using the ATILA program.
AB - Wireless sensor nodes self-powering from an ambient energy source have been widely studied. In particular, the piezoelectric energy harvesting has been the focus of attention, due to its high energy density. For the piezoelectric energy harvesting, a cantilever beam structure has normally been used because of its high efficiency. Since the frequency of environmental vibrations is of the order of hundreds of Hz, which is far below the natural frequency of cantilever type ceramic actuators, the frequency of the cantilever has commonly been adjusted by placing a heavy mass on its end. In order to lower its natural frequency and increase its safety factor, we fabricated a flexible piezoelectric cantilever, which was composed of ceramic on a flexible substrate. However, it was observed that the flexible cantilever was always broken at a certain position. This result indicates that the stress was not homogeneous, and concentrated at the breakage point of the ceramic. To analyze the failure of the ceramic, we measured the inhomogeneous stress distribution on the flexible piezoelectric energy harvester and analyzed it using the ATILA program.
KW - Cantilever
KW - Flexible energy harvester
KW - Piezoelectric energy harvesting
KW - Stress distribution
UR - http://www.scopus.com/inward/record.url?scp=70350228553&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=70350228553&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:70350228553
VL - 117
SP - 1074
EP - 1077
JO - Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
JF - Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
SN - 1882-0743
IS - 1370
ER -