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On the design of 1-3 piezocomposites using topology optimization
 

Summary: On the design of 1-3 piezocomposites using topology
optimization
O. Sigmund,a)
S. Torquato, and I. A. Aksay
Departments of Civil Engineering and Operations Research and Chemical Engineering,
Princeton Materials Institute, Princeton University, Princeton, New Jersey 08544
(Received 19 March 1997; accepted 12 August 1997)
We use a topology optimization method to design 1-3 piezocomposites with optimal
performance characteristics for hydrophone applications. The performance characteristics
we focus on are the hydrostatic charge coefficient dh , the hydrophone figure of merit
dh gh , and the electromechanical coupling factor kh . The piezocomposite consists
of piezoelectric rods embedded in an optimal polymer matrix. We use the topology
optimization method to design the optimal (porous) matrix microstructure. When we
design for maximum dh and dh gh , the optimal transversally isotopic matrix material
has negative Poisson's ratio in certain directions. When we design for maximum kh , the
optimal matrix microstructure is layered and simple to build.
I. INTRODUCTION
Piezoelectric transducers have been employed as
sensors and transmitters of acoustic signals in ultrasound
medical imaging, nondestructive testing, and under-

  

Source: Aksay, Ilhan A. - Department of Chemical Engineering, Princeton University
Torquato, Salvatore - Department of Chemical Engineering, Princeton University

 

Collections: Chemistry; Materials Science