TY - GEN
T1 - Clamping force effects on the performance of mechanically attached piezoelectric transducers for impedance-based NDE
AU - Tenney, Charles M.
AU - Albakri, Mohammad A.
AU - Williams, Christopher B.
AU - Tarazaga, Pablo A.
N1 - Publisher Copyright:
© Society for Experimental Mechanics, Inc. 2020.
PY - 2020
Y1 - 2020
N2 - 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 (600Â lb, 2670Â 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.
AB - 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 (600Â lb, 2670Â 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.
KW - Electromechanical impedance
KW - Manufacturing defects
KW - Non-destructive evaluation
KW - Piezoelectrics
UR - http://www.scopus.com/inward/record.url?scp=85065993593&partnerID=8YFLogxK
U2 - 10.1007/978-3-030-12676-6_33
DO - 10.1007/978-3-030-12676-6_33
M3 - Conference contribution
AN - SCOPUS:85065993593
SN - 9783030126759
T3 - Conference Proceedings of the Society for Experimental Mechanics Series
SP - 355
EP - 363
BT - Sensors 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
A2 - Seidlitz, Steve
A2 - Walber, Chad
A2 - Walter, Patrick
PB - Springer New York LLC
T2 - 37th IMAC, A Conference and Exposition on Structural Dynamics, 2019
Y2 - 28 January 2019 through 31 January 2019
ER -