Experimental study on the dynamic properties of magneto-rheological materials

Rajpal, Rohit; Lijesh, K. P.; Kant, Mohit; Gangadharan, K. V.

doi:10.1088/1757-899x/402/1/012140

Cited by 1 publication

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“…The decrease in natural frequency of the MRE specimen beam with intensification of the magnetic flux density can be due to the increase in its static deflection 25 . This phenomenon was explained by Rajpal 26 , et al.…”

Section: Natural Frequency (F S ) Of the Sandwich Specimenmentioning

confidence: 99%

Experimental Analysis of Viscoelastic Properties of Room Temperature Vulcanized Silicone based Magnetorheological Elastomer

Bhaktha

Hegde

2022

Def. Sc. J.

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Magnetorheological Elastomers (MRE) endure a change in mechanical properties with the application of an externally applied magnetic field. It consists of an elastomeric matrix reinforced with ferromagnetic powdered particles. This paper focuses on the investigation of viscoelastic properties of Room Temperature Vulcanized (RTV) silicone based isotropic MRE in sandwich beam configuration by varying the volume percentage of Carbonyl Iron Powdered (CIP) reinforcement. Viscoelastic properties of the MRE core material were calculated by following the ASTM E756-05 standard. The magnetic field was applied by employing a Halbach array which was numerically analyzed using Finite Element Method Magnetics (FEMM). The magnetic field was varied up to 0.15 T. Loss factor and shear modulus were found to be strongly influenced by the percentage content of CIP. The loss factor and shear modulus of 30% MRE at 0.15 T were higher than other tested samples. The variation of natural frequency with respect to the addition of CIP was validated numerically using Modal analysis conducted in Hyperworks.

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Section: Natural Frequency (F S ) Of the Sandwich Specimenmentioning

confidence: 99%