A 2-D model for friction of complex anisotropic surfaces

Costagliola, Gianluca; Bosia, Federico; Pugno, Nicola

doi:10.1016/j.jmps.2017.11.015

Cited by 27 publications

(41 citation statements)

References 67 publications

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“…Finally, Costagliola et al [234][235][236][237] proposed a spring-block modeling approach to investigate the fundamental mechanisms of dry friction between textured surfaces and how multi-scale surface textures influence static and dynamic friction. The model was used to show how the intricate surface geometry and local material properties on different length scales strongly affect the macroscopic friction force.…”

Section: Numerical Multi-scale Modelingmentioning

confidence: 99%

“…Finally, Costagliola et al [234][235][236][237] proposed a spring-block modeling approach to investigate the fundamental mechanisms of dry friction between textured surfaces and how multi-scale surface Figure 18. Overview of the multi-scale finite element method proposed by [233] to simulate hydrodynamic lubrication of large rough contact surfaces, which can be extended to deal with multi-scale textures.…”

Section: Numerical Multi-scale Modelingmentioning

confidence: 99%

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Multi-Scale Surface Texturing in Tribology—Current Knowledge and Future Perspectives

2019

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Surface texturing has been frequently used for tribological purposes in the last three decades due to its great potential to reduce friction and wear. Although biological systems advocate the use of hierarchical, multi-scale surface textures, most of the published experimental and numerical works have mainly addressed effects induced by single-scale surface textures. Therefore, it can be assumed that the potential of multi-scale surface texturing to further optimize friction and wear is underexplored. The aim of this review article is to shed some light on the current knowledge in the field of multi-scale surface textures applied to tribological systems from an experimental and numerical point of view. Initially, fabrication techniques with their respective advantages and disadvantages regarding the ability to create multi-scale surface textures are summarized. Afterwards, the existing state-of-the-art regarding experimental work performed to explore the potential, as well as the underlying effects of multi-scale textures under dry and lubricated conditions, is presented. Subsequently, numerical approaches to predict the behavior of multi-scale surface texturing under lubricated conditions are elucidated. Finally, the existing knowledge and hypotheses about the underlying driven mechanisms responsible for the improved tribological performance of multi-scale textures are summarized, and future trends in this research direction are emphasized.

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Section: Numerical Multi-scale Modelingmentioning

confidence: 99%

“…Finally, Costagliola et al [234][235][236][237] proposed a spring-block modeling approach to investigate the fundamental mechanisms of dry friction between textured surfaces and how multi-scale surface Figure 18. Overview of the multi-scale finite element method proposed by [233] to simulate hydrodynamic lubrication of large rough contact surfaces, which can be extended to deal with multi-scale textures.…”

Section: Numerical Multi-scale Modelingmentioning

confidence: 99%

Multi-Scale Surface Texturing in Tribology—Current Knowledge and Future Perspectives

2019

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“…was introduced in the first half of the past century and has led to the development of numerous discretized models used today (Nukala et al, 2005;Ostoja-Starzewski, 2002;Brely et al, 2015;Costagliola et al, 2018), thanks to its computational advantages. By varying the mechanical properties attributed to the elements, the anisotropic behaviours of heterogeneous materials can be studied.…”

Section: Theoretical Modelmentioning

confidence: 99%

A theoretical-numerical model for the peeling of elastic membranes

Liprandi

Bosia

Pugno

2020

Journal of the Mechanics and Physics of Solids

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The adhesive behaviour of biological attachment structures such as spider web anchorages is usually studied using single or multiple peeling models involving "tapes", i.e. one-dimensional contacts elements. This is an oversimplification for many practical problems, since the actual delamination process requires the modelling of complex two-dimensional adhesive elements. To achieve this, we develop a theoretical-numerical approach to simulate the detachment of an elastic membrane of finite size from a substrate, using a 3D cohesive law. The model is validated using existing analytical results for simple geometries, and then applied in a series of parametric studies. Results show how the pull-off force can be tuned or optimized by varying different geometrical or mechanical parameters in various loading scenarios, and the length of the detachment boundary, known as the peeling line, emerges as the key factor to maximize adhesion. The approach presented here can allow a better understanding of the mechanical behaviour of biological adhesives with complex geometries or with material anisotropies, highlighting the interaction between the stress distributions at the interface and in the membrane itself.

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“…These propagating stick-slip states have been observed also by Costagliola at al. [20], who extended the interfacial spring-block chain to two dimensions [21,22].…”

Section: Introductionmentioning

confidence: 99%

Nucleation and propagation of excitation fronts in self-excited systems

Shiroky

Papangelo

Hoffmann

et al. 2020

Physica D: Nonlinear Phenomena

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Frictional interfaces exhibits a very rich dynamical behavior due to frictional interactions. This work focuses on the transition between spatially localized and propagating stick-slip motion. To overcome the difficulties related to the non-smoothness of the friction law we have studied two models: (model I) a friction-excited chain of weakly coupled oscillators excited by a frictional moving belt and (model II) a chain of Van der Pol oscillators. The two models show very similar dynamical features.Both exhibit discrete breathers (i.e. spatially localized periodic solutions) solutions for low coupling and show propagation along the chain of high amplitude limit cycles for stronger elastic coupling between the unit cells. In both models the transition from discrete breathers to propagating limit cycles happens through a nucleation process and, above a certain critical coupling, the velocity of propagation scales linearly with the elastic coupling coefficient. We suggest that dynamical features similar to what was demonstrated in this work are expected for models that are different quantitatively but preserve the same single-unit topology.

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A 2-D model for friction of complex anisotropic surfaces

Cited by 27 publications

References 67 publications

Multi-Scale Surface Texturing in Tribology—Current Knowledge and Future Perspectives

Multi-Scale Surface Texturing in Tribology—Current Knowledge and Future Perspectives

A theoretical-numerical model for the peeling of elastic membranes

Nucleation and propagation of excitation fronts in self-excited systems

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