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Fazio V, Acito V, Amiot F, Frétigny C, Chateauminois A. Memory effects in friction: the role of sliding heterogeneities. Proc Math Phys Eng Sci 2021. [DOI: 10.1098/rspa.2021.0559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
We report on memory effects involved in the unsteady-state frictional response of a contact interface between a silicone rubber and a spherical glass probe when it is perturbed by changes in the orientation of the driving motion or by velocity steps. From measurements of the displacement fields at the interface, we show that observed memory effects can be accounted for by the non-uniform distribution of the sliding velocity within the contact interface. As a consequence of these memory effects, the friction force may no longer be aligned with respect to the sliding trajectory. In addition, stick–slip motions with a purely geometrical origin are also evidenced. These observations are adequately accounted for by a friction model that takes into account heterogeneous displacements within the contact area. When a velocity dependence of the frictional stress is incorporated in this model, unsteady-state regimes induced by velocity steps are also adequately described. The good agreement between the model and experiments outlines the role of space heterogeneities in memory effects involved in soft matter friction.
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Affiliation(s)
- Vincenzo Fazio
- Soft Matter Science and Engineering Laboratory (SIMM), PSL Research University, UPMC University Paris 6, Sorbonne Universités, ESPCI Paris, CNRS, 10 rue Vauquelin, Paris Cedex 05 75231, France
| | - Vito Acito
- Soft Matter Science and Engineering Laboratory (SIMM), PSL Research University, UPMC University Paris 6, Sorbonne Universités, ESPCI Paris, CNRS, 10 rue Vauquelin, Paris Cedex 05 75231, France
| | - Fabien Amiot
- Département Mécanique Appliquée, University Bourgogne Franche-Comté, Institut FEMTO-ST, CNRS/UFC/ENSMM/UTBM, 24 rue de l’Epitaphe, Besançon 25000, France
| | - Christian Frétigny
- Soft Matter Science and Engineering Laboratory (SIMM), PSL Research University, UPMC University Paris 6, Sorbonne Universités, ESPCI Paris, CNRS, 10 rue Vauquelin, Paris Cedex 05 75231, France
| | - Antoine Chateauminois
- Soft Matter Science and Engineering Laboratory (SIMM), PSL Research University, UPMC University Paris 6, Sorbonne Universités, ESPCI Paris, CNRS, 10 rue Vauquelin, Paris Cedex 05 75231, France
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Barney CW, Chen C, Crosby AJ. Deep indentation and puncture of a rigid cylinder inserted into a soft solid. SOFT MATTER 2021; 17:5574-5580. [PMID: 33982689 DOI: 10.1039/d0sm01775b] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Deep indentation and puncture can be used to characterize the large strain elastic and fracture properties of soft solids and biological tissues. While this characterization method is growing in application there are still open questions about deep indentation and puncture, including how the distribution of strains and stresses in the surrounding material relate to the resultant force exerted on the indenter. Direct quantification of the deformation field around a rigid indenter during penetration of a soft solid is necessary to substantiate the current qualitative understanding of these strains and increase the impact and usefulness of puncture tests. Here, the deformation field of a rigid cylinder inserted into a soft solid is quantified using digital image correlation (DIC). DIC measurements are validated by reconstituting the measured nominal force on the cylinder during deep indentation and puncture. The deformation field is used to map the strain field around the indenter during deep indentation and puncture. These measurements provide direct insight into the puncture process and show that while the resultant force mainly arises from the sheared region on the sides of the indenter, the compressed region below the tip is responsible for initiating failure.
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Affiliation(s)
- Christopher W Barney
- Department of Polymer Science and Engineering, University of Massachusetts, 120 Governors Drive, Amherst, MA 01003, USA.
| | - Chao Chen
- Department of Polymer Science and Engineering, University of Massachusetts, 120 Governors Drive, Amherst, MA 01003, USA.
| | - Alfred J Crosby
- Department of Polymer Science and Engineering, University of Massachusetts, 120 Governors Drive, Amherst, MA 01003, USA.
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Davis-Purcell B, Soulard P, Salez T, Raphaël E, Dalnoki-Veress K. Adhesion-induced fingering instability in thin elastic films under strain. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2018; 41:36. [PMID: 29564573 DOI: 10.1140/epje/i2018-11643-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Accepted: 02/28/2018] [Indexed: 06/08/2023]
Abstract
In this study, thin elastic films supported on a rigid substrate are brought into contact with a spherical glass indenter. Upon contact, adhesive fingers emerge at the periphery of the contact patch with a characteristic wavelength. Elastic films are also pre-strained along one axis before the initiation of contact, causing the fingering pattern to become anisotropic and align with the axis along which the strain was applied. This transition from isotropic to anisotropic patterning is characterized quantitatively and a simple model is developed to understand the origin of the anisotropy.
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Affiliation(s)
- Benjamin Davis-Purcell
- Department of Physics & Astronomy, McMaster University, Hamilton, L8S 4M1, Ontario, Canada
| | - Pierre Soulard
- Laboratoire de Physico-Chimie Théorique, UMR CNRS Gulliver 7083, ESPCI Paris, PSL Research University, 10 rue Vauquelin, 75005, Paris, France
| | - Thomas Salez
- Univ. Bordeaux, CNRS, LOMA, UMR 5798, F-33405, Talence, France
- Global Station for Soft Matter, Global Institution for Collaborative Research and Education, Hokkaido University, Sapporo, Japan
| | - Elie Raphaël
- Laboratoire de Physico-Chimie Théorique, UMR CNRS Gulliver 7083, ESPCI Paris, PSL Research University, 10 rue Vauquelin, 75005, Paris, France
| | - Kari Dalnoki-Veress
- Department of Physics & Astronomy, McMaster University, Hamilton, L8S 4M1, Ontario, Canada.
- Laboratoire de Physico-Chimie Théorique, UMR CNRS Gulliver 7083, ESPCI Paris, PSL Research University, 10 rue Vauquelin, 75005, Paris, France.
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