A New Fractal Model of Elastic, Elastoplastic and Plastic Normal Contact Stiffness for Slow Sliding Interface Considering Dynamic Friction and Strain Hardening

doi:10.1007/s12204-017-1877-6

上海交通大学学报（英文版） ›› 2017, Vol. 22 ›› Issue (5): 589-601.doi: 10.1007/s12204-017-1877-6

A New Fractal Model of Elastic, Elastoplastic and Plastic Normal Contact Stiffness for Slow Sliding Interface Considering Dynamic Friction and Strain Hardening

TIAN Hongliang (田红亮), CHEN Baojia* (陈保家), HE Kongde (何孔德), DONG Yuanfa (董元发), ZHONG Xianyou (钟先友), WANG Xiaopeng (王骁鹏), XI Neng (郤能)

(College of Mechanical and Power Engineering, China Three Gorges University, Yichang 443002, Hubei, China)

出版日期:2017-09-30 发布日期:2017-09-30
通讯作者: CHEN Baojia (陈保家) E-mail:cbjia@163.com

A New Fractal Model of Elastic, Elastoplastic and Plastic Normal Contact Stiffness for Slow Sliding Interface Considering Dynamic Friction and Strain Hardening

TIAN Hongliang (田红亮), CHEN Baojia* (陈保家), HE Kongde (何孔德), DONG Yuanfa (董元发), ZHONG Xianyou (钟先友), WANG Xiaopeng (王骁鹏), XI Neng (郤能)

(College of Mechanical and Power Engineering, China Three Gorges University, Yichang 443002, Hubei, China)

Online:2017-09-30 Published:2017-09-30
Contact: CHEN Baojia (陈保家) E-mail:cbjia@163.com

摘要/Abstract

摘要： The deflection properties of elastic stage, elastoplastic stage and plastic stage of elastomer were analyzed. Taking account of the kinetic friction force in friction interface and strain hardening in slow sliding interface, the elastic, elastoplastic and plastic normal contact stiffness model for harsh surface was established, which revised the Majumdar-Bhushan fractal model and made it more perfect. In the combination of macro and micro perspective, the effects of coarse surface fractal variables, kinetic friction force in the friction interface, material characters of the friction couples on the contact status and contact property were discussed by the study of digital analysis. Results imply that the normal contact stiffness improves with the increasing real contact area and normal contact load, and reduces with the augment of kinetic friction coefficient. When the kinetic friction coefficient is smaller than 0.3, the normal contact stiffness comprises a linear decrease with the increment of kinetic friction coefficient. When the kinetic friction coefficient is bigger than 0.3, the normal contact stiffness has an exponential decrease with the increasing kinetic friction coefficient.

关键词: slow sliding interface, elastoplastic contact, fractal geometry theory, dynamic friction coefficient, strain hardening, normal contact load

Abstract: The deflection properties of elastic stage, elastoplastic stage and plastic stage of elastomer were analyzed. Taking account of the kinetic friction force in friction interface and strain hardening in slow sliding interface, the elastic, elastoplastic and plastic normal contact stiffness model for harsh surface was established, which revised the Majumdar-Bhushan fractal model and made it more perfect. In the combination of macro and micro perspective, the effects of coarse surface fractal variables, kinetic friction force in the friction interface, material characters of the friction couples on the contact status and contact property were discussed by the study of digital analysis. Results imply that the normal contact stiffness improves with the increasing real contact area and normal contact load, and reduces with the augment of kinetic friction coefficient. When the kinetic friction coefficient is smaller than 0.3, the normal contact stiffness comprises a linear decrease with the increment of kinetic friction coefficient. When the kinetic friction coefficient is bigger than 0.3, the normal contact stiffness has an exponential decrease with the increasing kinetic friction coefficient.

Key words: slow sliding interface, elastoplastic contact, fractal geometry theory, dynamic friction coefficient, strain hardening, normal contact load

中图分类号:

TH 113.1

TIAN Hongliang (田红亮), CHEN Baojia* (陈保家), HE Kongde (何孔德), DONG Yuanfa (董元发),. A New Fractal Model of Elastic, Elastoplastic and Plastic Normal Contact Stiffness for Slow Sliding Interface Considering Dynamic Friction and Strain Hardening[J]. 上海交通大学学报（英文版）, 2017, 22(5): 589-601.

TIAN Hongliang (田红亮), CHEN Baojia* (陈保家), HE Kongde (何孔德), DONG Yuanfa (董元发),. A New Fractal Model of Elastic, Elastoplastic and Plastic Normal Contact Stiffness for Slow Sliding Interface Considering Dynamic Friction and Strain Hardening[J]. Journal of shanghai Jiaotong University (Science), 2017, 22(5): 589-601.

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A New Fractal Model of Elastic, Elastoplastic and Plastic Normal Contact Stiffness for Slow Sliding Interface Considering Dynamic Friction and Strain Hardening

A New Fractal Model of Elastic, Elastoplastic and Plastic Normal Contact Stiffness for Slow Sliding Interface Considering Dynamic Friction and Strain Hardening

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