ArticleProceedings of the National Academy of Sciences of the United States of America2018
Evolution of real contact area under shear and the value of static friction of soft materials.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers.
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Who cites it
25 citing papers in PubMed.
- Fingerpad contact evolution under electrovibration.Journal of the Royal Society, Interface · 2019Trial
- High-Fidelity Weak Signal Extraction for Coiled Tubing Acoustic Telemetry via Micro-Lever Suspension and Joint Denoising.Sensors (Basel, Switzerland) · 2026Article
- Frictional instabilities as an alternative to friction coefficient in fine touch perception.eLife · 2026Article
- Formation and compaction of sub-10 nm transfer films in metal-ceramic fretting.Beilstein journal of nanotechnology · 2026Article
- Evaluation of Robotic Swabbing and Fluorescent Sensing to Monitor the Hygiene of Food Contact Surfaces.Foods (Basel, Switzerland) · 2025Article
- Controlled Dry Adhesion of Bio-Inspired Fibrillar Polymers: Mechanics, Strategies, and Recent Advances.Materials (Basel, Switzerland) · 2025Review
- Compressing slippery surface-assembled amphiphiles for tunable haptic energy harvesters.Science advances · 2025Article
- Molecular Probing of the Microscopic Pressure at Contact Interfaces.Journal of the American Chemical Society · 2024Article
- Article
- Indentation and Detachment in Adhesive Contacts between Soft Elastomer and Rigid Indenter at Simultaneous Motion in Normal and Tangential Direction: Experiments and Simulations.Biomimetics (Basel, Switzerland) · 2023Article
- In Situ Observation of Micro-Patterned Elastomeric Surfaces: The Formation of the Area of Real Contact and the Influence on Its Friction and Deformation Behaviour.Materials (Basel, Switzerland) · 2023Article
- Creasing in microscale, soft static friction.Nature communications · 2023Article
- Biomechanics of the finger pad in response to torsion.Journal of the Royal Society, Interface · 2023Article
- Local Shearing Force Measurement during Frictional Sliding Using Fluorogenic Mechanophores.The journal of physical chemistry letters · 2022Article
- The evolution of rock friction is more sensitive to slip than elapsed time, even at near-zero slip rates.Proceedings of the National Academy of Sciences of the United States of America · 2022Article
- Normal and tangential forces combine to convey contact pressure during dynamic tactile stimulation.Scientific reports · 2022Article
- Development of high slip-resistant footwear outsole using rubber surface filled with activated carbon/sodium chloride.Scientific reports · 2022Article
- Electromagnetic Feet With Soft Toes for Adaptive, Versatile, and Stable Locomotion of an Inchworm-Inspired Pipe Crawling Robot.Frontiers in bioengineering and biotechnology · 2022Article
- An experimental study on the relation between friction force and real contact area.Scientific reports · 2021Article
- Soft-bodied adaptive multimodal locomotion strategies in fluid-filled confined spaces.Science advances · 2021Article
Corrections and comments
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Authors and funding
7 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The frictional properties of a rough contact interface are controlled by its area of real contact, the dynamical variations of which underlie our modern understanding of the ubiquitous rate-and-state friction law. In particular, the real contact area is proportional to the normal load, slowly increases at rest through aging, and drops at slip inception. Here, through direct measurements on various contacts involving elastomers or human fingertips, we show that the real contact area also decreases under shear, with reductions as large as 30[Formula: see text], starting well before macroscopic sliding. All data are captured by a single reduction law enabling excellent predictions of the static friction force. In elastomers, the area-reduction rate of individual contacts obeys a scaling law valid from micrometer-sized junctions in rough contacts to millimeter-sized smooth sphere/plane contacts. For the class of soft materials used here, our results should motivate first-order improvements of current contact mechanics models and prompt reinterpretation of the rate-and-state parameters.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.