Clamping force effects on the performance of mechanically attached piezoelectric transducers for impedance-based NDE

Charles M. Tenney*, Mohammad A. Albakri, Christopher B. Williams, Pablo A. Tarazaga

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Citations (Scopus)

Abstract

Impedance-based non-destructive evaluation (NDE) constitutes a generalization of structural health monitoring (SHM), where comparisons between known-healthy reference structures and potentially-defective structures are used to identify damage. The quantity considered by impedance-based NDE is the electrical impedance of a piezoelectric element bonded to the part under test, which is linked to the dynamic vibrational response of the part under test through electromechanical coupling. In this work, the piezoelectric element is not bonded directly to the part under test, but rather to a c-shaped clamp, which is then mechanically attached to the part under test. Under this attachment condition, the effect of clamping force on the sensitivity of the impedance-based evaluation is investigated for machined steel blocks with varying levels of damage severity. The highest clamping force tested (600 lb, 2670 N) was the only condition exhibiting increasing damage metric values with increasing damage severity in the parts under test, suggesting that higher clamping force increases sensitivity to damage.

Original languageEnglish
Title of host publicationSensors and Instrumentation, Aircraft/Aerospace, Energy Harvesting and Dynamic Environments Testing, Volume 7 - Proceedings of the 37th IMAC, A Conference and Exposition on Structural Dynamics 2019
EditorsSteve Seidlitz, Chad Walber, Patrick Walter
PublisherSpringer New York LLC
Pages355-363
Number of pages9
ISBN (Print)9783030126759
DOIs
Publication statusPublished - 2020
Externally publishedYes
Event37th IMAC, A Conference and Exposition on Structural Dynamics, 2019 - Orlando, United States
Duration: 28 Jan 201931 Jan 2019

Publication series

NameConference Proceedings of the Society for Experimental Mechanics Series
ISSN (Print)2191-5644
ISSN (Electronic)2191-5652

Conference

Conference37th IMAC, A Conference and Exposition on Structural Dynamics, 2019
Country/TerritoryUnited States
CityOrlando
Period28/01/1931/01/19

Keywords

  • Electromechanical impedance
  • Manufacturing defects
  • Non-destructive evaluation
  • Piezoelectrics

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