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Rev Sci Instrum. 2014 Jun;85(6):065103. doi: 10.1063/1.4879935.

A novel in situ device based on a bionic piezoelectric actuator to study tensile and fatigue properties of bulk materials.

Author information

  • 1The Key Laboratory of Engineering Bionics (Ministry of Education) and the College of Biological and Agricultural Engineering, Jilin University (Nanling Campus), 5988 Renmin Street, Changchun 130025, People's Republic of China.
  • 2College of Mechanical Science and Engineering, Jilin University (Nanling Campus), 5988 Renmin Street, Changchun 130025, People's Republic of China.
  • 3College of Automotive Engineering, Jilin University (Nanling Campus), 5988 Renmin Street, Changchun 130025, People's Republic of China.

Abstract

In this work, a miniaturized device based on a bionic piezoelectric actuator was developed to investigate the static tensile and dynamic fatigue properties of bulk materials. The device mainly consists of a bionic stepping piezoelectric actuator based on wedge block clamping, a pair of grippers, and a set of precise signal test system. Tensile and fatigue examinations share a set of driving system and a set of signal test system. In situ tensile and fatigue examinations under scanning electron microscope or metallographic microscope could be carried out due to the miniaturized dimensions of the device. The structure and working principle of the device were discussed and the effects of output difference between two piezoelectric stacks on the device were theoretically analyzed. The tensile and fatigue examinations on ordinary copper were carried out using this device and its feasibility was verified through the comparison tests with a commercial tensile examination instrument.

PMID:
24985848
[PubMed - indexed for MEDLINE]
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