DOI: 10.18150/7juv5u
title: Processed measurement data of shear stresses distribution in the cushion filled with magnetorheological (MR) fluid

description: Provided here csv files cointain processed data gathered during experiments described in the article entitled: Design and Optimization of a Magnetic Field Exciter for Controlling Magnetorheological Fluid in a Hybrid Soft-Rigid Jaw Gripper.   https://doi.org/10.3390/en16052299The data are under Creative Commons License CC BY. It is though recommended to manipulate along with the author to fully understand the outcomes. If you have any questions do not hesitate to contact: marcin.bialek@put.poznan.plThis research was funded by the National Science Centre, Poland grant number: 2021/41/N/ST8/02619. https://ror.org/03ha2q922   DESCRIPTION:The dataset provides the outcome of the finite element study of the shear stress distributions in the magnetorheological fluid (MRF) when subjected to magnetic field excitation. Different dimensions of permanent magnet, yoke, and air gap were examined. The work focused on optimizing the magnetic circuit of a field exciter used to control magnetorheological fluid (MRF) in a hybrid soft-rigid jaw gripper. Specifically, it addresses the sealing of MRF within a cushion made of thermoplastic polyurethane (TPU). A parametric numerical model of the magnetic field exciter was developed, allowing for the analysis of over 4600 variations of the magnetic circuit. The model, implemented in Ansys Electronics Desktop 2020 finite element method (FEM) package, determines the shear stress distribution in the MRF inside the cushion. The research focused on finding magnetic circuit dimensions that result in the desired shear stress distribution within the MRF. Both undeformed and deformed cushion geometries, caused by axial plunging of the pin, were analyzed. The evaluation criteria include achieving the highest possible shear stress value and ensuring its uniform distribution within the specific cross-sectional area of the MRF cushion. The main objective was to design a magnetic field exciter suitable for jaw pads in a gripper that utilizes MRF cushions.MR fluid applied: LORD MRF-140CG   ----------------------------------------   FILES:   1. "processedDataset__not_pressed_2mm.csv" - This file contains measurement data along a section parallel to the bottom of the cushion at a height of 2 mm. The cushion is in its undeformed state - not pressed.   2. "processedDataset__pressed_2mm.csv" - This file contains measurement data along a section parallel to the bottom of the cushion at a height of 2 mm. The cushion is in its deformed state - pressed.   3. "processedDataset__pressed_6-4mm.csv" - This file contains measurement data along a section parallel to the bottom of the cushion at a height of 6.4 mm. The cushion is in its deformed state - pressed.   For proper interpretation, please refer to the images provided in the Readme files.   ----------------------------------------   COLUMNS:   gm [mm] - Thickness of the permanent magnet in mm.   kj [] - The ratio of the width of the yoke with respect to the sum of the width of the yoke and the air gap. The percentage value expressed as a decimal fraction.   kpm [] - The ratio of the diameter of the permanent magnet with regard to the diameter of the entire magnetic field source 23.7 mm. The percentage value expressed as a decimal fraction.   pos_Z [mm] - Distance of the face of the magnetic field source to the base of the cushion in mm. Expressed as "z" in the picture below.   Distance [mm] - Distance of the cross section measurement segment in mm. Expressed as "r" in the picture below.   TauB [] - The value of shear stress occurring in the cross-section in kPa.