Tuning apparent friction coefficient by controlled patterning bulk metallic glasses surfaces

Li, Ning; Xu, Erjiang; Liu, Ze; Wang, Xinyun; Liu, Lin

doi:10.1038/srep39388

Cited by 37 publications

(20 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The interest of this study lies not only in the numerical modeling of friction in itself, but also has practical purposes: there are many studies relative to bio-inspired materials [20]- [23] or biological materials [24]- [28] that reproduce non-trivial geometries that can not be reduced to one-dimensional structures.…”

Section: Introductionmentioning

confidence: 99%

“…a Young's modulus E = 10 MPa, which it typical for a soft polymer or rubber-like material and a density ρ = 1.2 g/cm 3 . The distance between blocks l in the model is an arbitrary parameters representing the smallest surface feature that can be taken into account and it is chosen by default as l = 10 −3 cm, so that the order of magnitude matches those typical of surface structures used in experiments [20]- [23].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A 2-D model for friction of complex anisotropic surfaces

Costagliola

Bosia

Pugno

2018

Journal of the Mechanics and Physics of Solids

View full text Add to dashboard Cite

The friction force observed at macroscale is the result of interactions at various lower length scales that are difficult to model in a combined manner. For this reason, simplified approaches are required, depending on the specific aspect to be investigated. In particular, the dimensionality of the system is often reduced, especially in models designed to provide a qualitative description of frictional properties of elastic materials, e.g. the spring-block model. In this paper, we implement for the first time a two dimensional extension of the spring-block model, applying it to structured surfaces and investigating by means of numerical simulations the frictional behaviour of a surface in the presence of features like cavities, pillars or complex anisotropic structures. We show how friction can be effectively tuned by appropriate design of such surface features.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A 2-D model for friction of complex anisotropic surfaces

Costagliola

Bosia

Pugno

2018

Journal of the Mechanics and Physics of Solids

View full text Add to dashboard Cite

show abstract

“…First, the surface can be polished in a spatially variable manner or using different processes in order to have a varying roughness and thus varying local friction coefficients. Secondly, a surface with a gradient in the frictional properties can be obtained by appropriately fabricating and arranging microscopic structures of variable geometries or sizes, giving rise to variable local friction coefficients [ 40 – 41 ].…”

Section: Resultsmentioning

confidence: 99%

Evidence of friction reduction in laterally graded materials

Guarino

Costagliola

Bosia

et al. 2018

Beilstein J. Nanotechnol.

View full text Add to dashboard Cite

In many biological structures, optimized mechanical properties are obtained through complex structural organization involving multiple constituents, functional grading and hierarchical organization. In the case of biological surfaces, the possibility to modify the frictional and adhesive behaviour can also be achieved by exploiting a grading of the material properties. In this paper, we investigate this possibility by considering the frictional sliding of elastic surfaces in the presence of a spatial variation of the Young’s modulus and the local friction coefficients. Using finite-element simulations and a two-dimensional spring-block model, we investigate how graded material properties affect the macroscopic frictional behaviour, in particular, static friction values and the transition from static to dynamic friction. The results suggest that the graded material properties can be exploited to reduce static friction with respect to the corresponding non-graded material and to tune it to desired values, opening possibilities for the design of bio-inspired surfaces with tailor-made tribological properties.

show abstract

“…The combined properties of both superhydrophobicity and strong adhesion toward liquid exhibit promising applications as dry adhesives and transport of liquid micro-droplets, as well as desirable mechanical and corrosion resistance showing potential applications in modern industries [64]. Furthermore, Li et al revealed that MGs surfaces with hot-embossed textures exhibit low friction coefficient especially under dry contact (see Figure 8), which indicates that the lifetime of the textured surfaces could be optimized by minimizing friction [65]. Thermoplastic Forming of Metallic Glasses http://dx.doi.org/10.5772/intechopen.78016…”

Section: Potential Applicationsmentioning

confidence: 99%

Thermoplastic Forming of Metallic Glasses

Li¹,

Ma²

2018

Metallic Glasses - Properties and Processing

Self Cite

View full text Add to dashboard Cite

Metallic glasses (MGs) are an unusual class of materials that possess an amorphous atomic-level structure and display a plethora of desirable mechanical, chemical and physical properties, which makes them one of the most promising engineering materials. However, the poor processability of metallic glasses greatly hindered their engineering applications. Though some techniques have been developed to fabricate metallic glass components, the unique superplasticity of supercooled liquid metallic glasses attracts enduring attentions, which allows thermoplastic forming of metallic glasses on length scales ranging from atomic-size to centimeter and especially offers an alluring prospect in the field of microfabrication. While some pivotal aspects during thermoplastic forming of metallic glasses should be addressed, for example, the evaluation of thermoplastic formability and its relationship with material flowing characteristic, the required thermoplastic forming techniques for processing MG components with high quality and the potential applications of these thermoplastic formed textures are compressively reviewed in this chapter.

show abstract

Tuning apparent friction coefficient by controlled patterning bulk metallic glasses surfaces

Cited by 37 publications

References 41 publications

A 2-D model for friction of complex anisotropic surfaces

A 2-D model for friction of complex anisotropic surfaces

Evidence of friction reduction in laterally graded materials

Thermoplastic Forming of Metallic Glasses

Contact Info

Product

Resources

About