Modify the friction between steel ball and PDMS disk under water lubrication by surface texturing

Li, Jinfeng; Zhou, Fei; Wang, Xiaolei

doi:10.1007/s11012-010-9298-8

Cited by 32 publications

(29 citation statements)

References 26 publications

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“…Since the steel balls were mechanically implanted inside the PDMS matrix, the contribution from shearing and fracture of adhesion bonds between the contacting surfaces to the total dissipation energy should be negligible as compared to the deformation and the abrasion of PDMS asperities. Furthermore, since the friction force between steel balls and the PDMS increases with the normal (and equivalently, the applied) force25 and the loading rate26, the energy dissipation due to this mechanism will greatly enhance at higher loads and during high strain rate loadings; both aspects of this dissipative mechanism is highly desirable in a shock absorption and damping application. Although the quantification of the relative contributions of the aforementioned different energy dissipative mechanisms is beyond the scope of the present work, it is reasonable to speculate that the localized strain-induced recrystallization of the PDMS matrix and the friction between the steel balls and the PDMS may primarily be responsible for the damping and shock absorption in the materials tested in this study.…”

Section: Discussionmentioning

confidence: 99%

“…This is particularly important at high strain rates where heat generation in the polymeric structure is very high due to the high friction between the sliding polymeric chains as well as in between a steel ball and the surrounding polymeric region26. Due to the limited time available for the heat conduction (or transfer) to ambient at high strain rates, local heating is exacerbated in monolithic PDMS leading to complete melting or destruction of these samples; on other hand, steel balls in PDMS-steel ball composite act as effective heat sink and relieve excessive heating of the composite sample.…”

Section: Discussionmentioning

confidence: 99%

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Periodic Architecture for High Performance Shock Absorbing Composites

Misra

Kumar

2013

Sci Rep

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A novel composite architecture consisting of a periodic arrangement of closely-spaced spheres of a stiff material embedded in a soft matrix is proposed for extremely high damping and shock absorption capacity. Efficacy of this architecture is demonstrated by compression loading a composite, where multiple steel balls were stacked upon each other in a polydimethylsiloxane (PDMS) matrix, at a low strain-rate of 0.05 s−1 and a very high strain-rate of >2400 s−1. The balls slide over each other upon loading, and revert to their original position when the load is removed. Because of imposition of additional strains into the matrix via this reversible, constrained movement of the balls, the composite absorbs significantly larger energy and endures much lesser permanent damage than the monolithic PDMS during both quasi-static and impact loadings. During the impact loading, energy absorbed per unit weight for the composite was ~8 times larger than the monolithic PDMS.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Periodic Architecture for High Performance Shock Absorbing Composites

Misra

Kumar

2013

Sci Rep

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“…These advantages include improved hydrodynamic lubrication, capture of negative abrasives, action as a lubricant reservoir, and promotion of a cooling effect on the sealing surface. Previous research experimentally demonstrated the usefulness of artificially-fabricated surface texture in extending load-carrying capacity in water [10,11] and oil [12,13] environments. However, the effect of surface texture on frictional properties in a blood or plasma environment [14], mainly consists of water, electrolyte and abundant proteins [14], has not yet been investigated.…”

Section: Introductionmentioning

confidence: 99%

Influence of Surface Texture on Friction Properties of Mechanical Seals for Blood -Design Concept of Sealing Surface of Mechanical Seal for Ventricular Assist Device-

Kanda

Sato

Kinoshita³

et al. 2016

Tribology Online

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Low, stable friction, a higher load-carrying capacity, and lower leakage of sealed blood are required for mechanical seals in implantable ventricular assist devices. One solution is to apply surface texture to the mechanical seal surface, consisting of self-mated silicon carbide. However, the effect of surface texture on the frictional properties of mechanical seals under blood sealing conditions has not yet been studied. Therefore, this study aimed to clarify the effect of surface texture on fundamental frictional properties of mechanical seals and to propose design concepts for mechanical seals in ventricular assist devices. The results show that surface texture increases the critical load of mechanical seals, although it also causes periodic peaks in friction. Further, it was found that surface texture induces the formation of denatured protein aggregates on the sealing surface, also inducing periodic surface friction peaks. The frictional properties of the mechanical seals were stabilized by creating small, dispersed concave features with wet blast fabrication, followed by coating with diamond-like carbon. Lower and more stable frictional properties were thus achieved, while simultaneously ensuring a higher critical load.

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“…Thus, the fabrication of regular micro‐textures that reduce contact area ( A t ) of the film surface can lead to a reduction in COF. Previous studies have reported that by creating micro‐sized features in metallic and polymeric surfaces, the tribological characteristics and hydrophobicity can be modified . This can help avoid the use of external lubricants, such as silicone oils and fluorinated compounds, that must be avoided in environmentally sensitive applications.…”

Section: Introductionmentioning

confidence: 99%

“…For various materials, micro‐textural features have been typically created by means of batch techniques such as mold casting using lithographically made micro‐molds , plasma processes , and chemical/ion beam etching or laser texturing . These processes can be expensive and slow for bulk production of polyolefin films.…”

Section: Introductionmentioning

confidence: 99%

Continuously extruded micro‐textured polypropylene films

Villacorta

Hulseman²,

Cannon³

et al. 2013

Polymer Engineering & Sci

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The continuous extrusion of micro-textured isotactic polypropylene (i-PP) film and its tribological properties are reported. As analyzed by scanning electron microscopy, a rectangular-semicircular micro-patterned die successfully produced extruded cast-films with hill-like micro-texture. Such films displayed static and kinetic coefficients of friction (COF s and COF k ) values of 0.247 6 0.028 and 0.245 6 0.003, respectively, for a steel fixture sliding along the micro-texture of the film. The equivalent COF s and COF k values for non-textured (NT) films were 0.369 6 0.036 and 0.340 6 0.024, respectively, confirming that textured films displayed a reduction in COF of about 30%. For textured and NT films sliding on textured films, the COF k values were even lower at 0.161 6 0.013 and 0.113 6 0.004, which represents about 20-40% reduction as compared with that for the NT-NT counterparts. Films coated with a silicone lubricant displayed COF s and COF k values of 0.334 6 0.042 and 0.099 6 0.012, respectively, for NT films sliding over lubricated NT films, and 0.426 6 0.031 and 0.063 6 0.006, respectively, for textured films sliding over lubricated textured films. The COF k values for textured/non-lubricated films approach those of NT/lubricated films, indicating that micro-textured polypropylene films may be used in environmentally sensitive applications where lubricants and fluorinated additives may not be used for reducing friction.

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Modify the friction between steel ball and PDMS disk under water lubrication by surface texturing

Cited by 32 publications

References 26 publications

Periodic Architecture for High Performance Shock Absorbing Composites

Periodic Architecture for High Performance Shock Absorbing Composites

Influence of Surface Texture on Friction Properties of Mechanical Seals for Blood -Design Concept of Sealing Surface of Mechanical Seal for Ventricular Assist Device-

Continuously extruded micro‐textured polypropylene films

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