Inverse Design of Metainterfaces for Static Friction Control: Beyond the Hertzian Limit
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arXiv
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| Autori principali: | , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866914580143276032 |
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| author | Bilotto, Jacopo Singhal, Arnav Garcia-Suarez, Joaquin Cortes, Gaëtan Fourel, Lucas Molinari, Jean-François |
| author_facet | Bilotto, Jacopo Singhal, Arnav Garcia-Suarez, Joaquin Cortes, Gaëtan Fourel, Lucas Molinari, Jean-François |
| contents | Programming the static friction of mechanical interfaces is critical for soft robotics, haptics, and precision gripping. Static friction is governed by the real contact area, and standard rough surfaces exhibit a linear area-load scaling inherent to classical Archard and Greenwood-Williamson models, severely restricting their functional range. Here, we propose a framework for the inverse design of tribological metainterfaces engineered for programmable contact behaviors. By utilizing general axisymmetric asperities, we unlock nonlinear macroscopic responses unattainable by standard Hertzian contacts. To solve the inverse problem, we embed a fully differentiable contact mechanics engine within a neural network and a quadratic optimizer. We leverage regularized physical gradients to automatically discover non-standard topographies that reproduce complex target friction laws, with only a few asperities in unit cells. The predicted designs are strictly validated against high-fidelity Boundary Element Method (BEM) simulations. This framework bridges data-driven optimization and rigorous physics, offering a scale-invariant pathway for discovering functional tribological surfaces. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_11012 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Inverse Design of Metainterfaces for Static Friction Control: Beyond the Hertzian Limit Bilotto, Jacopo Singhal, Arnav Garcia-Suarez, Joaquin Cortes, Gaëtan Fourel, Lucas Molinari, Jean-François Soft Condensed Matter Programming the static friction of mechanical interfaces is critical for soft robotics, haptics, and precision gripping. Static friction is governed by the real contact area, and standard rough surfaces exhibit a linear area-load scaling inherent to classical Archard and Greenwood-Williamson models, severely restricting their functional range. Here, we propose a framework for the inverse design of tribological metainterfaces engineered for programmable contact behaviors. By utilizing general axisymmetric asperities, we unlock nonlinear macroscopic responses unattainable by standard Hertzian contacts. To solve the inverse problem, we embed a fully differentiable contact mechanics engine within a neural network and a quadratic optimizer. We leverage regularized physical gradients to automatically discover non-standard topographies that reproduce complex target friction laws, with only a few asperities in unit cells. The predicted designs are strictly validated against high-fidelity Boundary Element Method (BEM) simulations. This framework bridges data-driven optimization and rigorous physics, offering a scale-invariant pathway for discovering functional tribological surfaces. |
| title | Inverse Design of Metainterfaces for Static Friction Control: Beyond the Hertzian Limit |
| topic | Soft Condensed Matter |
| url | https://arxiv.org/abs/2605.11012 |