Modeling and characterization of contact behavior of asperities with irregular shapes  

作　　者：Jiaxin Huang Chen Sun Jubing Chen 

机构地区：[1]Department of Engineering Mechanics,Shanghai Jiao Tong University,Shanghai 200240,PR China

出　　处：《Theoretical & Applied Mechanics Letters》2025年第1期32-42,共11页力学快报(英文版)

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.12272227 and 11732009).

摘　　要：This paper introduces a model for characterizing the contact behavior of irregular asperities,transforming it into a superposition of sinusoidal asperity contact behaviors.A new sinusoidal asperity model is developed for bilin-ear hardening under plane strain conditions.Empirical equations are proposed,considering geometric shapes,tangent modulus,and Young’s modulus.The frequency of asperity height is extracted through Fourier transform for irregular asperities.Contact area and pressure are predicted using the sinusoidal asperity model,and the behavior of irregular asperities is obtained by superimposing those with the first three frequencies.Experimen-tal validation is conducted with milling and knurling-formed asperities,showing good alignment between the model and experimental results.In rough surface models,the proposed irregular asperity model exhibits greater accuracy in predicting contact behavior than a single sinusoidal asperity when interference exceeds 10%of the amplitude.

关 键 词：Experimental characterization Finite element method Plastic deformation Asperity contact 

分 类 号：TH117.1[机械工程—机械设计及理论]