Spherical Indentation tests on rail R260 steel

<p>This data set contains photos and measurement data from spherical indentation tests on R260 rail steel.&nbsp;<br>This data set belongs to the following journal article:</p> <p>Bettina Suhr, William A. Skipper, &nbsp;Roger Lewis, Klaus Six:<br>DEM modelling of surface indentations caused by granular materials: application to wheel&ndash;rail sanding,<br>Computational Particle Mechanics, 2024,<br>https://doi.org/10.1007/s40571-024-00816-w</p> <p>A flat specimen made of the R260 rail steel was indented by a stainless steel (AISI 440C) ball bearing of 8.73 mm diameter.&nbsp;<br>The following normal loads were applied for indentation tests:&nbsp;<br>100 N, 500 N, 1000 N, 2000 N, 3000 N, 4000 N, 5000 N, 6000 N, 7500 N. &nbsp;<br>For each load level, two tests were conducted to check the repeatability of the measurement.&nbsp;<br>After tests, the indent was analysed using the Alicona InfiniteFocusSL 3D optical profilometer.&nbsp;<br>The Alicona captured a 3D scan covering a 3.66 mm x 3.66 mm area (vertical resolution of 500 nm). &nbsp;</p> <p>Available data and file naming conventions</p> <p>For the test at 100 N load, the available files are named as follows:</p> <p>11-32__100N.jpg: image coloured by the indentation depth<br>11-32__100N_Diameter.jpg: image of the indent with visually measured diameter of the indent<br>11-32__100N.txt: point cloud of the analyzed surface</p> <p>The repetition measurements&rsquo; files at 100N load are named: 11-32__100N_a.jpg, 11-32__100N_Diameter_a.jpg, 11-32__100N_a.txt</p> <p>The files belonging to test with higher applied load are named accordingly.</p> <p><br>This research was funded in whole, or in part, by the Austrian Science Fund (FWF) project<br>&nbsp;P 34273: DEM modelling of adhesion in sanded wheel-rail contacts.</p> <p>This work was conducted at Virtual Vehicle Research GmbH in Graz, Austria.&nbsp;<br>The authors would like to acknowledge the financial support within the COMET K2 Competence Centers&nbsp;<br>for Excellent Technologies from the Austrian Federal Ministry for Climate Action (BMK), the&nbsp;<br>Austrian Federal Ministry for Labour and Economy (BMAW), the Province of Styria (Dept.&nbsp;<br>12) and the Styrian Business Promotion Agency (SFG). The Austrian Research Promotion&nbsp;<br>Agency (FFG) has been authorised for the programme management.&nbsp;</p> <p>&nbsp;</p>