This article presents a numerical investigation of guided wave generation, propagation, interaction with
damage, and reception in piezoelectric composite plates for the purpose of establishing structural self-awareness.
This approach employs piezoelectric composite materials as both load bearing structure and sensing elements.
Finite element modal analysis of a plate cell with Bloch-Floquet boundary condition (BFBC) is performed to
understand the wave propagation characteristics in piezoelectric composite plates. A comparative study is carried
out between a standard composite plate and a piezoelectric composite plate to highlight the influence of piezoelectricity
on guided wave dispersion relations. Subsequently, a transient dynamic coupled-field finite element
model is constructed to simulate the procedure of guided wave generation, propagation, interaction with damage,
and reception in a piezoelectric composite plate. Active sensing array is designed to capture the structural
response containing the damage information. Three engineering scenarios, including a pristine case, a one-damagelocation
case and a two-damage-location case, are considered to demonstrate the ultrasonic sensing capability of
the piezoelectric composite system. Finally, time-reversal method is utilized to locate and image the damage
zones. This research shows that piezoelectric composite material possesses great potential to establish structural
self-awareness, if it serves both as the load bearing and structural sensing components.
WANG Junzhen (王军振), SHEN Yanfeng* (申岩峰)
. Numerical Investigation of Ultrasonic Guided Wave Dynamics in Piezoelectric Composite Plates for Establishing Structural Self-Sensing[J]. Journal of Shanghai Jiaotong University(Science), 2018
, 23(1)
: 175
-181
.
DOI: 10.1007/s12204-018-1923-z
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