Share Email Print
cover

Proceedings Paper

Determination of plastic strains from compression tests including the effect of change of Young's modulus
Author(s): Theo Fett; Marc Kamlah; Dietrich Munz; Gerhard Thun
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

Under compressive loading piezoelectric material shows an interesting change of Young's modulus with increasing compressive strain. This effect is of importance for the determination of plastic strain contributions of stress- strain curves in compression test. Two different possibilities are considered to define plastic strain contributions. To obtain Young's modulus, partial unloading test were performed on a soft PZT material. The applied load was measured with a DC load cell and the related strains were obtained by a pair of strain gauges. In addition to the continuously increased external load small pulse-shaped partial unloadings of about 1 MPa were superimposed. Young's modulus was found to be variable during the mechanical test and increased from 40-70 MPa up to about 130-150 Gpa.

Paper Details

Date Published: 11 July 2002
PDF: 10 pages
Proc. SPIE 4699, Smart Structures and Materials 2002: Active Materials: Behavior and Mechanics, (11 July 2002); doi: 10.1117/12.474963
Show Author Affiliations
Theo Fett, Forschungszentrum Karlsruhe GmbH (Germany)
Marc Kamlah, Forschungszentrum Karlsruhe GmbH (Germany)
Dietrich Munz, Forschungszentrum Karlsruhe GmbH (Germany)
Gerhard Thun, Forschungszentrum Karlsruhe GmbH (Germany)


Published in SPIE Proceedings Vol. 4699:
Smart Structures and Materials 2002: Active Materials: Behavior and Mechanics
Christopher S. Lynch, Editor(s)

© SPIE. Terms of Use
Back to Top