Determination of plastic strains from compression tests including the effect of change of Young's modulus

Theo Fett; Marc Kamlah; Dietrich Munz; Gerhard Thun

doi:10.1117/12.474963

11 July 2002 Determination of plastic strains from compression tests including the effect of change on Young's modulus

Theo Fett, Marc Kamlah, Dietrich Munz, Gerhard Thun

Proceedings Volume 4699, Smart Structures and Materials 2002: Active Materials: Behavior and Mechanics; (2002) https://doi.org/10.1117/12.474963
Event: SPIE's 9th Annual International Symposium on Smart Structures and Materials, 2002, San Diego, California, United States

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.

Citation Download Citation

Theo Fett, Marc Kamlah, Dietrich Munz, and Gerhard Thun "Determination of plastic strains from compression tests including the effect of change on Young's modulus", Proc. SPIE 4699, Smart Structures and Materials 2002: Active Materials: Behavior and Mechanics, (11 July 2002); https://doi.org/10.1117/12.474963

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available