 | | Mechanics of Solids
A Journal of Russian Academy of Sciences | | Founded
in January 1966
Issued 6 times a year
Print ISSN 0025-6544
Online ISSN 1934-7936 |
Archive of Issues
| Total articles in the database: | | 12788 |
| In Russian (Èçâ. ÐÀÍ. ÌÒÒ): | | 8028
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| In English (Mech. Solids): | | 4760 |
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| A.A. Pankov, "Influence of Pore Shape and Initial Stress State on the Electroelastic Properties of Porous Piezoceramics PZT-4," Mech. Solids. 59 (1), 142-155 (2024) |
| Year |
2024 |
Volume |
59 |
Number |
1 |
Pages |
142-155 |
| DOI |
10.1134/S0025654423601386 |
| Title |
Influence of Pore Shape and Initial Stress State on the Electroelastic Properties of Porous Piezoceramics PZT-4 |
| Author(s) |
A.A. Pankov (Perm National Research Polytechnic University, Perm, 614990 Russia, a_a_pankov@mail.ru) |
| Abstract |
A numerical-analytical solution to the “effective modulus problem” of transversally isotropic porous ceramics is obtained, taking into account its initial stressed state and the ellipsoidal shape
of oriented pores of various connectivity based on the solution of the associated stochastic boundary
value problem of electroelasticity of composite mechanics using the Green’s function method.
A numerical calculation of the initial and resulting values of the effective piezoelectric modulus of
porous piezoceramics (PZT-4) was carried out depending on the values of the volume fraction, shape
parameter and connectivity of ellipsoidal, in particular: spherical, disk or tunnel pores, taking into
account the initial stressed state of the porous piezoceramics due to its initial axisymmetric deformation. Characteristic values of the volume fraction of spherical and disk pores are identified, taking into
account their connections, at which the sign of the numerical values of the initial effective piezoelectric modulus changes with respect to the corresponding module of PZT-4 monolithic ceramics.
The values of the volume fraction, shape parameter and type of pore connectivity at which the maximum gradients of the linear dependence of the values of the resulting piezoelectric modulus of porous
piezoceramics on its initial macrodeformations are realized are determined. An analysis of graphs of continuous dependences of the initial and resulting values of the effective piezoelectric modulus on the
pore shape parameter is given for various cases of their volumetric content, connectivity and axisymmetric initial deformations of porous piezoceramics. |
| Keywords |
porous piezoceramics, effective properties, ellipsoidal pores, initial stress state, electroelasticity, numerical modeling |
| Received |
13 June 2023 | Revised |
12 July 2023 | Accepted |
04 August 2023 |
| Link to Fulltext |
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