Deformation and strength behavior of a soft PZT ceramic

Dietrich Munz; Theo Fett; Stefan Mueller; Gerhard Thun

doi:10.1117/12.316289

24 July 1998 Deformation and strength behavior of a soft PZT ceramic

Dietrich Munz, Theo Fett, Stefan Mueller, Gerhard Thun

Proceedings Volume 3323, Smart Structures and Materials 1998: Mathematics and Control in Smart Structures; (1998) https://doi.org/10.1117/12.316289
Event: 5th Annual International Symposium on Smart Structures and Materials, 1998, San Diego, CA, United States

Abstract

Nonsymmetric deformation in tension and compression was measured for a PZT-ceramic. Besides direct measurements in tension and compression tests a method to obtain the nonsymmetric deformation from bending tests was developed. Large differences in strength between tensile and bending tests were found and related to the nonlinear stress distribution in the bending bars and to the statistical size effect. The deformation behavior of PZT-ceramics is mainly investigated under compressive load. Non-linear stress- strain curves were observed and interpreted by domain switching processes. Early results on electroceramics were reported by Subbarao et al. for polycrystalline barium titanate. From these results Subbarao et al. concluded that the Young's modulus would be different in tension and compression. A more detailed analysis of their data shows significant plastic strain contributions in tension and negligible compressive plastic strains, i.e. a non-symmetry in plastic strains. This behavior must have consequences on strength in bending bars due to non-linear stress distribution.

Citation Download Citation

Dietrich Munz, Theo Fett, Stefan Mueller, and Gerhard Thun "Deformation and strength behavior of a soft PZT ceramic", Proc. SPIE 3323, Smart Structures and Materials 1998: Mathematics and Control in Smart Structures, (24 July 1998); https://doi.org/10.1117/12.316289

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