Scale effects in tribological properties of solid-lubricating composites made of ultra-high molecular weight polyethylene filled with calcium stearate particles

International Conference on Mechanical Engineering, Automation and Control Systems 2015

机械制造;无线电电子学;计算机科学

Lurie, S.A.^1,2 ; Volkov-Bogorodskiy, D.B.^1 ; Knyzeva, A.G.^3 ; Panin, S.V.^4 ; Kornienko, L.A.^4

Institute of Applied Mechanics of Russian Academy of Sciences, 7, Leningradskiy ave., Moscow

125040, Russia^1

Dorodnicyn Computing Centre of Russian Academy of Sciences, 40, Vavilova str., Moscow

119333, Russia^2

Tomsk Polytechnic University, 30, Lenina ave., Tomsk

634050, Russia^3

Inst. of Strength Phys. and Mat. Science of the Siberian Branch of the Russian Academy of Sciences, 2/4, Akademicheskiy ave., Tomsk

634021, Russia^4

关键词: Effective friction coefficient;    Effective mechanical properties;    Gradient elasticity theories;    Heterogeneous materials;    Heterogeneous structures;    Polymer composite materials;    Tribological properties;    Tribotechnical characteristics;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/124/1/012035/pdf
DOI  :  10.1088/1757-899X/124/1/012035

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

Friction properties being influenced by scale effects are simulated in the paper by the example of polymer composite material made from Ultra High-Molecular Weight Polyethylenes (UHMWPE) filled by calcium stearate (C36H70CaO4). Of interest are the composites whose mechanical properties and tribotechnical characteristics do not depend monotonically on filler (inclusions) weight fraction. In order to describe the influence of scale effects onto frictional properties the model based on Reiss averaging (model of «weak phase») is employed. It is also suggested that when gradient elasticity theory is applicable the formal analogy between effective friction coefficient for surface heterogeneous structures and effective mechanical properties (compliances) for heterogeneous material can take place. Theoretical dependence to describe nonmonotonic change of effective friction coefficient versus filler concentration was obtained for the polymer composites under study. The suggested expressions might be useful for the sake of properties prognosis of antifriction polymeric materilas.