Digital surface twin #4571

This dataset contains the Original 8192-32 surface height topography used in the numerical simulations and theoretical analysis presented in:
- Surface separation in elastoplastic contacts (Almqvist & Persson, 2025, arXiv:2507.14054)
- Multiscale contact mechanics for elastoplastic contacts (Almqvist & Persson, 2025, arXiv:2508.15492)

The surface is provided as an xyz-triplet describing the topography of an 8192x8192-node large self-affine fractal rough surface 8192-32, characterised by the ratio of the highest to lowest wavenumber (8192) and by the width of the high-wavenumber cut-off region (8, 16, 32).

This data served as input to boundary element method (BEM) simulations of frictionless contact between a rigid flat and an elastic–perfectly plastic half-space, exhibiting the roughness defined by the present height maps. The simulations assumed Young’s modulus: 250 GPa, Poisson’s ratio: 0, and Penetration hardness: 150 GPa.

The dataset enables reproduction of the results presented in the manuscripts.

File contents:

*.txt files with three columns: x [m], y [m], z [m]

Applications:
These data can be reused for studies of multiscale contact mechanics, elastoplastic contact area, interfacial separation, sealing, leakage, and wear.

License: CC-BY 4.0. Please cite this dataset DOI and the associated publications when reusing the data.