Hysteretic Behaviors of Yield Stress in Smart ER/MR Materials: Experimental Results

Young Min Han; Quoc Hung Nguyen; Seung Bok Choi; Kyung Su Kim

doi:10.4028/www.scientific.net/KEM.326-328.1459

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 326-328Hysteretic Behaviors of Yield Stress in Smart...

Hysteretic Behaviors of Yield Stress in Smart ER/MR Materials: Experimental Results

Abstract:

This paper experimentally investigates the hysteretic behaviors of yield stress in electrorheological (ER) and magnetorheological (MR) materials which are known as smart materials. As a first step, the PMA-based ER material is prepared by dispersing the chemically synthesized polymethylaniline (PMA) particles into non-conducting oil. For the MR material, commercially available one (Lord MRF-132LD) is chosen for the test. Using the rheometer, the torque resulting from the shear stress of the ER/MR materials is measured, and then the yield stress is calculated from the measured torque. In order to describe the hysteretic behavior of the fielddependent yield stress, a nonlinear hysteresis model of the ER/MR materials is formulated between input (field) and output (yield stress). Subsequently, the Preisach model is identified using experimental first order descending (FOD) curves of yield stress in discrete manner. The effectiveness of the identified hysteresis model is verified in time domain by comparing the predicted field-dependent yield stress with the measured one.

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Periodical:

Key Engineering Materials (Volumes 326-328)

Pages:

1459-1462

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.326-328.1459

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Cite this paper

Online since:

December 2006

Authors:

Young Min Han, Quoc Hung Nguyen, Seung Bok Choi, Kyung Su Kim

Keywords:

Electrorheological (ER) Material, Hysteretic Behaviour, Magnetorheological (MR) Material, Preisach Model, Yield Stress

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