Characterization of the magnetorheological fluid MRF-140 CG for applications in robotic prosthesis

Abstract

The present article shows the different results of the rheological properties of the magneto-rheological fluid (MRF-140CG; LORD Co. (USA), focused on predicting its behavior in devices that use these materials, to characterize the fluid MRF-140CG several tests were performed using a rotational rheometer Anton Paar Physica MRC-501 equipped with a magnetic rheological cell MRD-70/1Text, according to DIN-53018, the tests were performed with magnetic fields from 0 T to a maximum of 800mT with increments of 200mT and temperatures from 20 to 50°C with increments of 10°C in each test. In addition, in order to determine the dynamic model, a shock absorber designed by the authors was tested in accordance with ISO 2954 standards on the Dyno-Shock 11 test bench. To determine which of the models precisely predicts the behavior of the magnetic rheological fluid, a comparison was made between Experimental model, Bingham plastic model, the Bi-Viscose model and the Herschel-Buckley model. This contributed to the design of increasingly sophisticated, reliable and efficient intelligent mechanical devices according to each need.