Tribological properties of the beetle leg joints  

作　　者：Konstantin NADEIN Alexander KOVALEV Stanislav N.GORB 

机构地区：[1]Functional Morphology and Biomechanics,Zoological Institute,Christian-Albrechts University of Kiel,Am Botanischen Garten 1-9,24118 Kiel,Germany

出　　处：《Friction》2024年第12期2791-2807,共17页摩擦（英文版）

基　　金：supported by the grants for Konstantin NADEIN from the German Research Foundation(DFG project“Functional design of beetle leg joints:morphology,tribology,and cuticular microstructure”,NA 126472-1 and DFG project“Arthropod leg joints as biological devices:design,mechanical properties and anti-friction mechanisms”,NA 1264/3-1);Stanislav N.GORB acknowledges the project support from the German Research Foundation(DFG GO 995/34-1 within the framework of the DFG SPP 2100“Soft Material Robotic Systems”).

摘　　要：Tribological properties of femoro-tibial leg joints in two beetles,darkling beetle Zophobas morio and Congo rose chafer Pachnoda marginata were studied.Very low friction of 0.004 was revealed by the direct measurements in the joint.It is assumed that semi-solid lubricant functioning as in technical bearings is one of the leading factors of the friction minimization.Dependence of the surface texture and physical chemical properties(hydrophobicity)on the cuticle friction was analysed.Contribution of the surface texture to the tribological properties of contacting surfaces was examined by the measurement in the tribosystem“contacting surface/glass”.It is supposed that coefficient of friction(COF)decreases with decrease of surface roughness.At the same time,no statistically significant correlation was found between the hydrophobicity of the surface and the value of the friction coefficient.

关 键 词：BIOTRIBOLOGY friction ARTICULATION contact angle surface texture LUBRICATION 

分 类 号：TH117.1[机械工程—机械设计及理论]