Measurement of surface displacements in 1-3 and 1-1-3 piezocomposites

Li, L.; Sottos, Nancy R.

doi:10.1063/1.360958

Cited by 6 publications

(4 citation statements)

References 9 publications

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“…The Young's modulus of a PVS sample is three orders of magnitude lower than that of a Spurr's epoxy resin substrate. 44 Therefore both PVS sample roughness and deformation determine interfacial stress variations, consequently crack initiation, and pull-off. Precise analysis of an elastic fibril adhesion on a rigid substrate based on experimental results, 45 the simplest surface interaction model, 46,47 and finite element simulations predicts: 48…”

Section: Dry Adhesionmentioning

confidence: 99%

Wet versus dry adhesion of biomimetic mushroom-shaped microstructures

2012

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Currently, biomimetic geometry-controlled adhesives are based mostly on dry adhesion, whereas the majority of adhesive systems in biology involve fluids. Here, we assess the influence of the presence of oil on a pull-off force measured in a flat-on-flat contact between a mushroom-shaped microstructured adhesive and chemically identical smooth and rough substrates. A microstructured surface has stronger adhesion compared to a smooth control on both smooth and rough substrates in both dry and oiled contacts. In the presence of oil, the microstructured surface has stronger adhesion on both smooth and rough substrates compared to the dry contact. We found that, after detachment from the substrate, a microstructured surface retains fluid more effectively compared to the smooth control. The study demonstrates that covering an adhesive microstructure with an oil film may expand its application range, showing that this method is potentially attractive for the creation of new biomimetic adhesives.

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Section: Dry Adhesionmentioning

confidence: 99%

Wet versus dry adhesion of biomimetic mushroom-shaped microstructures

2012

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“…On the other hand, for piezoelectric actuators, the measurement of surface displacement generated by a pure external electric input is significant for the design of intelligent structures (Li and Sottos, 1996). All of these are involved with the response of elastic fields under an applied electric excitation.…”

Section: Introductionmentioning

confidence: 99%

Elastic Response of a Piezoelectric Ceramic Plate with Two Penny-shaped Electrodes at the Opposite Surfaces Under an Electric Load

Lee

2007

Journal of Intelligent Material Systems and Structures

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The electric and elastic behaviors of a piezoelectric actuator under an external electric input are analyzed. The actuator is composed of a piezoelectric ceramic plate with two penny-shaped thin electrodes at the opposite surfaces. The problem is solved by using the Hankel transform technique. By reducing the mixed boundary value problem to a Fredholm integral equation of the second kind, numerical results are presented for the mechanical response of the piezoelectric plate subjected to applied electric stimulus. The profiles of the elastic displacements and the distributions of the stresses for a PZT-5H plate are shown graphically. The results indicate that the vertical surface displacement arrives at a maximum at the electrode region, while the radial surface displacement arrives at a peak at the electrode edge. Moreover, elastic stresses arrive at their peaks near the electrode edge within the piezoelectric plate.

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“…This locally nonuniform deformation eventually determines the overall electromechanical behavior of the composite. Previous experimental and theoretical work [1][2][3] have demonstrated that significant increases in hydrostatic sensitivity can be achieved by adding a third phase or interlayer around the piezoceramic rod which results in the so-called 1-1-3 piezocomposites.…”

Section: Introductionmentioning

confidence: 99%

“…In the current work, dynamic displacement profiles are measured on piezocomposite samples with interlayers identical to those used by Li and Sottos. 1 The influence of the interlayer properties on the displacement profiles is investigated as function of driving frequency. Dynamic displacements are compared to the static profiles obtained previously by Li and Sottos.…”

Section: Introductionmentioning

confidence: 99%

Dynamic surface displacement measurement in 1-3 and 1-1-3 piezocomposites

Lian

Sottos

1998

Journal of Applied Physics

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The sensitivity of 1-3 piezocomposites can be improved by the addition of a third phase or interlayer around the piezoceramic rods which results in a composite with 1-1-3 connectivity. In the current investigation, dynamic surface displacements of both 1-3 and 1-1-3 piezocomposites were measured using a laser Doppler heterodyne interferometer. Dynamic displacement profiles showing the nonuniform deformation of the piezoelectric rod and the nonpiezoelectric polymer were obtained at 10 Hz, 100 Hz, and 1.0 kHz. Measurements of the displacement at the center of the piezoelectric rod were performed over the frequency range from 10 Hz to 27 kHz. Three different interlayer conditions were considered. The experimental measurements demonstrated that both the surface displacement profile and the maximum rod displacement varied with frequency and interlayer properties. The dynamic displacement profiles were also compared with previously measured static displacement profiles.

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Measurement of surface displacements in 1-3 and 1-1-3 piezocomposites

Cited by 6 publications

References 9 publications

Wet versus dry adhesion of biomimetic mushroom-shaped microstructures

Wet versus dry adhesion of biomimetic mushroom-shaped microstructures

Elastic Response of a Piezoelectric Ceramic Plate with Two Penny-shaped Electrodes at the Opposite Surfaces Under an Electric Load

Dynamic surface displacement measurement in 1-3 and 1-1-3 piezocomposites

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