Analysis of stress distribution in flexible piezoelectric energy harvester

Hyun Cheol Song, Chong-Yun Kang, Seok J. Yoon, Dae Yong Jeong

Research output: Contribution to journalArticle

3 Citations (Scopus)

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 languageEnglish
Pages (from-to)1074-1077
Number of pages4
JournalNippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
Volume117
Issue number1370
Publication statusPublished - 2009 Oct 1

Fingerprint

Harvesters
Energy harvesting
stress distribution
Stress concentration
Natural frequencies
ceramics
Safety factor
Cantilever beams
Sensor nodes
resonant frequencies
Actuators
safety factors
energy
cantilever beams
Substrates
energy sources
flux density
actuators
low frequencies
vibration

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 journalArticle

Song, Hyun Cheol ; Kang, Chong-Yun ; Yoon, Seok J. ; Jeong, Dae Yong. / Analysis of stress distribution in flexible piezoelectric energy harvester. In: Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan. 2009 ; Vol. 117, No. 1370. pp. 1074-1077.
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