The scratch hardness and friction of a soft rigid-plastic solid

Briscoe, B.J.; Biswas, SK; Sinha, Sujeet K.; Panesar, S.S.

doi:10.1016/0301-679x(93)90092-f

Cited by 23 publications

(6 citation statements)

References 11 publications

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“…The calculation of the adhesive part of the scratch force can be quite complex. However, a first order analysis has been presented by the authors [38] with a correlation to experimental results for a model visco-plastic material.…”

Section: Scratch Hardness Models 21 Generic Responsesmentioning

confidence: 98%

Scratch Resistance and Localised Damage Characteristics of Polymer Surfaces – a Review

Briscoe

Sinha

2003

Materialwissenschaft Werkst

114

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The "Scratch Test" is, arguably, the earliest and amongst the now most widely used techniques for evaluating a wide range of surface mechanical properties. Some of the areas where this test has been successfully used in the engineering field, both by research and industry, include the determination of the relative hardness of materials, characterizations of coatings, paints and thin-films, modeling of the wear of materials and the estimation of different material deformation characteristics when subjected to hard asperity damage. In this paper we have reviewed the "state-of-the-art" in the scratch method for polymeric materials. The paper provides some important theoretical models that have been developed in the field of scratching for material property characterizations. Results from different types of scratch tests (macro, micro and nano scales) on a range of polymeric materials are presented with critical discussion on the usefulness of each result. Finally, various areas for further research in scratching of polymer surfaces have been identified.

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Section: Scratch Hardness Models 21 Generic Responsesmentioning

confidence: 98%

Scratch Resistance and Localised Damage Characteristics of Polymer Surfaces – a Review

Briscoe

Sinha

2003

Materialwissenschaft Werkst

114

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“…The friction force, F, generated by scratching a rigid perfectly plastic material with a cone [41] is given by, …”

Section: Rigid Plastic Analysismentioning

confidence: 99%

Mechanics of Deformation under Traction and Friction of a Micrometric Monolithic MoS2 Particle in Comparison with those of an Agglomerate of Nanometric MoS2 Particles

2009

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Tribology of small inorganic nanoparticles in suspension in a liquid lubricant is often impaired because these particles agglomerate even when organic dispersants are used. In this paper we use lateral force microscopy to study the deformation mechanism and dissipation under traction of two extreme configurations (1) a large MoS 2 particle (*20 lm width) of about 1 lm height and (2) an agglomerate (*20 lm width), constituting 50 nm MoS 2 crystallites, of about 1 lm height. The agglomerate records a friction coefficient which is about 5-7 times that of monolithic particle. The paper examines the mechanisms of material removal for both the particles using continuum modeling and microscopy and infers that while the agglomerate response to traction can be accounted for by the bulk mechanical properties of the material, intralayer and interlayer basal planar slips determine the friction and wear of monolithic particles. The results provide a rationale for selection of layered particles, for suspension in liquid lubricants.

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“…The scratch loading mode was used for the establishment of the first hardness scale in the pioneering work of Mohs (1824), but the technique is mostly being used nowadays in specialized areas including the visual damage and wear of polymers (Briscoe et al, 1993;Dasari et al, 2004;Misra et al, 2004;Maeda et al, 2005;Mohamed Sani et al, 2005) and the tribological resistance of metallic-base composites (Zhang et al, 1994(Zhang et al, , 1995Liang et al, 1995;Deuis et al, 1996;Wilson et al, 2000;Bolduc et al, 2003). The limited usage to characterize the plastic flow behavior is mostly due to the lack of an appropriate analytical framework to interpret frictional sliding experiments.…”

Section: Introductionmentioning

confidence: 99%

The frictional sliding response of elasto-plastic materials in contact with a conical indenter

Bellemare

Dao

Suresh

2007

International Journal of Solids and Structures

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Over the past decade, many computational studies have explored the mechanics of normal indentation. Quantitative relationships have been well established between the load-displacement hysteresis response and material properties. By contrast, very few studies have investigated broad quantitative aspects of the effects of material properties, especially plastic deformation characteristics, on the frictional sliding response of metals and alloys. The response to instrumented, depth-sensing frictional sliding, hereafter referred to as a scratch test, could potentially be used for material characterization. In addition, it could reproduce a basic tribological event, such as asperity contact and deformation, at different length scales for the multi-scale modeling of wear processes. For these reasons, a comprehensive study was undertaken to investigate the effect of elasto-plastic properties, such as flow strength and strain hardening, on the response to steady-state frictional sliding. Dimensional analysis was used to define scaling variables and universal functions. The dependence of these functions on material properties was assessed through a detailed parametric study using the finite element method. The strain hardening exponent was found to have a greater influence on the scratch hardness and the pile-up height during frictional sliding than observed in frictionless normal indentation. When normalized by the penetration depth, the pileup height can be up to three times larger in frictional sliding than in normal indentation. Furthermore, in contrast to normal indentation, sink-in is not observed during frictional sliding over the wide range of material properties examined. Finally, friction between indenter and indented material was introduced in the finite element model, and quantitative relationships were also established for the limited effects of plastic strain hardening and yield strength on the overall friction coefficient. Aspects of the predictions of computational simulations were compared with experiments on carefully selected metallic systems in which the plastic properties were systematically controlled. The level of accuracy of the predicted frictional response is also assessed by recourse to the finite element method and by comparison with experiment.

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The scratch hardness and friction of a soft rigid-plastic solid

Cited by 23 publications

References 11 publications

Scratch Resistance and Localised Damage Characteristics of Polymer Surfaces – a Review

Scratch Resistance and Localised Damage Characteristics of Polymer Surfaces – a Review

Mechanics of Deformation under Traction and Friction of a Micrometric Monolithic MoS2 Particle in Comparison with those of an Agglomerate of Nanometric MoS2 Particles

The frictional sliding response of elasto-plastic materials in contact with a conical indenter

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