Supporting Information
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Supporting Information File 1:
Detachment of a surface with a small gradient in the local coefficients of friction.
Time evolution of the dimensionless longitudinal stress σx/p for a surface with a gradient in the local coefficients of friction, computed using SBM for the case Δ = 0.1. The detachment process starts where the local static friction threshold is smaller, i.e., where the local static coefficient of friction is smaller. |
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| Format: AVI | Size: 5.4 MB | Download |
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Supporting Information File 2:
Detachment of a surface with a large gradient in the local coefficients of friction.
Time evolution of the dimensionless longitudinal stress σx/p for a material with a gradient in the local coefficients of friction, computed using SBM for the case Δ = 0.3. The detachment process starts where the local static friction threshold is smaller, i.e., where the local static coefficient of friction is smaller. |
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| Format: AVI | Size: 4.4 MB | Download |
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Supporting Information File 3:
Detachment of a surface with a positive triangular gradient in the material Young’s modulus.
Time evolution of the dimensionless longitudinal stress σx/p for a material with a triangular gradient in the Young’s modulus, computed using SBM for the case Δ = 0.2. The detachment process starts at the centre of the sliding plate and propagates towards the edges. |
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| Format: AVI | Size: 5.7 MB | Download |
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Supporting Information File 4:
Detachment of a surface with a negative triangular gradient in the material Young’s modulus.
Time evolution of the dimensionless longitudinal stress σx/p for a material with a negative triangular gradient in the Young’s modulus, computed using SBM for the case Δ = −0.2. The detachment process starts at the edges of the sliding plate and propagates towards the centre. |
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| Format: AVI | Size: 5.0 MB | Download |
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Supporting Information File 5:
Effect of the finite-element type on the surface stress distributions.
Normalised normal and tangential stresses with respect to the applied pressure p as a function of the dimensionless coordinate x/L. C3D8R: 8-node brick with reduced integration, C3D8I: 8-node brick with 8 points of integration and incompatible modes. |
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| Format: PDF | Size: 58.3 KB | Download |
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Supporting Information File 6:
Computed values of the global static coefficients of friction.
Tables reporting the computed absolute values of the global static coefficients of friction µs, as function of Δ, obtained using SBM and FEM, for the case of a gradient in the local coefficients of friction and a gradient in the material Young’s modulus. |
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| Format: PDF | Size: 217.6 KB | Download |
Cite the Following Article
Evidence of friction reduction in laterally graded materials
Roberto Guarino, Gianluca Costagliola, Federico Bosia and Nicola Maria Pugno
Beilstein J. Nanotechnol. 2018, 9, 2443–2456.
https://doi.org/10.3762/bjnano.9.229
How to Cite
Guarino, R.; Costagliola, G.; Bosia, F.; Pugno, N. M. Beilstein J. Nanotechnol. 2018, 9, 2443–2456. doi:10.3762/bjnano.9.229
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- Jalali, S. K.; Pugno, N. Enhanced Composite Design Through Incorporation of Tribological Considerations in Micromechanical Models. In 2023 IEEE International Workshop on Sport, Technology and Research (STAR), IEEE, 2023; pp 57–63. doi:10.1109/star58331.2023.10302653
- Costagliola, G.; Bosia, F.; Pugno, N. M. Correlation between slip precursors and topological length scales at the onset of frictional sliding. International Journal of Solids and Structures 2022, 243, 111525. doi:10.1016/j.ijsolstr.2022.111525
- Costagliola, G.; Bosia, F.; Pugno, N. M. Tuning of frictional properties in torsional contact by means of disk grading. Friction 2022, 10, 787–802. doi:10.1007/s40544-021-0535-z
