Structural damping using encapsulated shear thickening fluids

Mathieu Soutrenon; Véronique Michaud

doi:10.1117/12.915143

27 March 2012 Structural damping using encapsulated shear thickening fluids

Mathieu Soutrenon, Véronique Michaud

Proceedings Volume 8341, Active and Passive Smart Structures and Integrated Systems 2012; 83410S (2012) https://doi.org/10.1117/12.915143
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2012, San Diego, California, United States

Abstract

Smart structures with tunable damping and stiffness characteristics are of high interest to aerospace applications, but often require an external power source to be activated. This can be avoided by using highly concentrated silica suspensions, which exhibit a shear-thickening behavior, linked to a dramatic increase in viscous dissipation. These materials are however liquid at rest, and sensitive to humidity, so they are difficult to implement as such into structural applications. In the present work, highly concentrated solutions of monodisperse silica particles in PEG were selected for their strong thickening effect at rather low critical shear strain. Damping properties were characterized by measuring the energy dissipated per cycle at low frequency (<2Hz) during oscillatory tests using a rheometer. STF were impregnated in an open-cell foam scaffold and encapsulated into a RTV-silicone to produce patches that can be handled easily. Silicone also protects the STF against outgassing or humidity pickup. Experimental results show a simultaneous increase of stiffness and damping properties for theses patches at low frequencies and large strains. Damping is thus getting closer to the range of elastomeric commercial damping materials, possibly overtaking them in specific conditions.

Citation Download Citation

Mathieu Soutrenon and Véronique Michaud "Structural damping using encapsulated shear thickening fluids", Proc. SPIE 8341, Active and Passive Smart Structures and Integrated Systems 2012, 83410S (27 March 2012); https://doi.org/10.1117/12.915143

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