DOI: 10.5061/dryad.0vt4b8h7c
title: Load vs. displacement data from compressive loading of omnidirectional wheels

description: This dataset includes plots of load versus displacement for compressive
 loading of various omnidirectional wheels. The data was used to
 characterize the load relaxation and stiffness of omnidirectional wheels
 at loading of up to 1,600 lbf. The aim of the research leading to this
 dataset was to determine the importance of different wheel characteristics
 in determining wheel performance.
description: This dataset includes plots
 for load versus displacement from compressive loading of omnidirectional
 wheels. The plots were created using the Python matplotlib
 library.  The data was collected from an Instron 68FM.
 A compression creep/relax test method was used to test each wheel. The
 test method was as follows: the Instron quickly ramped to a specified
 load, held the position of the target load for 15 seconds, and then
 returned to zero displacement. The method was repeated three times at each
 target load, and there were a total of 15 target loads, starting with 200
 lbf and increasing in increments of 100 lbf to 1600 lbf. Three wheel
 replicates were tested for each wheel source.  Wheels
 from eight sources were tested. See the readme file for more information
 about the meaning of the codes used to distinguish each wheel
 source.
description: # Load vs. displacement data from compressive loading of omnidirectional
 wheels This dataset includes plots of load versus displacement data
 obtained from static compressive loading tests on omnidirectional wheels
 sourced from eight different manufacturers. A compression creep/relaxation
 test method was employed using Instron Bluehill software to evaluate the
 viscoelastic behavior of the wheels. Data was collected directly from the
 Instron machine. The test parameters are detailed below. **Test
 parameters:** Instron 68FM-100 Compression creep/relax method 15 levels of
 loading (starting load: 200 lbf, ending load: 1600 lbf) Holding time: 15
 seconds Replicates per load increment: 3 Tests were conducted with
 standard Instron compression platens.
 [https://doi.org/10.5061/dryad.0vt4b8h7c](https://doi.org/10.5061/dryad.0vt4b8h7c) ## Description of the data and file structure This dataset includes plots from tests conducted on eight different wheel sources, organized into a total of 24 folders. Each folder is labeled according to the wheel source and replicate number. For each source, there are three wheel replicates, and each replicate contains 15 plots. Each plot illustrates the load versus displacement data from three tests conducted at a single load increment. The folder names follow a specific convention, indicating the wheel source abbreviation and the replicate number. For example, the folder named "GR 2_Plots" contains plots from the second replicate of GTF Robots. Similarly, a plot labeled "GR 2_200 lbf_plot" corresponds to the 200 lbf test for GTF Robots wheel replicate 2. All data is presented in English units (lbf for load and inches for displacement). **Wheel source abbreviations:** SH: Guangzhou Sanhok Hitech Co. SD: Stardrawing International Trading (Shanghai) Co. ML: Magliner (Rotacaster) OT: Omnitrack (Rotacaster) GR: GTF Robots DZ: Dongguan Zoty Bearing Co. HH: Henan Hengmai Industrial Automation Co., Ltd VR: Vex Robotics