Flexoelectric strain gradient detection using Ba0.64Sr 0.36TiO3 for sensing

Wenbin Huang, Xiang Yan, Seol Ryung Kwon, Shujun Zhang, Fuh Gwo Yuan, Xiaoning Jiang

Research output: Contribution to journalArticlepeer-review

75 Citations (Scopus)


Strain gradient sensing offers an alternative avenue for in-situ monitoring of onset and growth of cracks in structural health monitoring, where the strain gradient is the most sensitive measurand. In this study, flexoelectric strain gradient sensing structures using Ba0.64Sr0.36TiO 3 (BST) were attached on the proximity of an open hole in an aluminum plate, to monitor strain gradient variations of the specimen under a uniaxial dynamic load. Charge outputs of the BST micro-bars showed good linearity with the average strain gradients, with a sensitivity of 88 pC m, which is in good agreement with the theoretical estimation by assuming a 30 μm bonding thickness.

Original languageEnglish
Article number252903
JournalApplied Physics Letters
Issue number25
Publication statusPublished - 2012 Dec 17

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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