Stress relaxation response of active fiber composites

Hassene Ben Atitallah; Anastasia Muliana; Zoubeida Ounaies

doi:10.1117/12.883429

27 April 2011 Stress relaxation response of active fiber composites

Hassene Ben Atitallah, Anastasia Muliana, Zoubeida Ounaies

Proceedings Volume 7978, Behavior and Mechanics of Multifunctional Materials and Composites 2011; 797807 (2011) https://doi.org/10.1117/12.883429
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2011, San Diego, California, United States

Abstract

The mechanical and physical properties of materials change with time which can be due to the viscoelastic effect and/or due to hostile environmental conditions and electromagnetic fields. An experimental study on active fiber composites (AFCs) having PZT5A fibers dispersed in epoxy shows that the mechanical response of AFC depends on time, temperature, and mechanical loading. We examine the time-dependent response of the AFC, where the polymer constituent undergoes pronounced viscoelastic deformations at different temperatures and mechanical loadings. A micromechanical model is used for predicting effective time-dependent response in active fiber composites with thermal, electrical, and mechanical coupling effects. The micromechanical model is derived based on a simplified unit-cell model in which limited information on the local field variables in the fiber and matrix constituents can be incorporated in predicting overall performance of active composites. We compare the overall stress relaxation response of the active composites determined from the micromechanical model with those from available experimental data. We found that the viscoelastic behavior of the matrix constituent can significantly influence the electro-mechanical coupling response of the AFC and elevated temperatures accelerate the relaxation process of the epoxy matrix and the AFCs.

Citation Download Citation

Hassene Ben Atitallah, Anastasia Muliana, and Zoubeida Ounaies "Stress relaxation response of active fiber composites", Proc. SPIE 7978, Behavior and Mechanics of Multifunctional Materials and Composites 2011, 797807 (27 April 2011); https://doi.org/10.1117/12.883429

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