Analysis of the apparent friction of polymeric surfaces

被引:59
作者
Lafaye, S. [1 ]
Gauthier, C. [1 ]
Schirrer, R. [1 ]
机构
[1] Inst Charles Sadron, CNRS, UPR 22, F-67083 Strasbourg, France
关键词
D O I
10.1007/s10853-006-0710-7
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The apparent friction coefficient is the ratio between the tangential force and the normal load applied to moving body in contact with the surface of a material. This coefficient includes a so-called "true local friction" at the interface and a "geometrical friction" which is the ploughing effect. The material underneath a moving tip may display various types of behaviour: elastic, elastic-plastic where elastic and plastic strain are present in the contact area, or fully plastic. As is usual in polymers, the material behaviour is time and temperature dependent and may exhibit strain hardening. A surface flow line model of a scratching tip which links the apparent friction to the local friction and contact geometry was recently proposed. An inverse analysis is used in the present work to estimate the local friction from the measured apparent friction and a knowledge of the contact area and tip shape. The polymer true friction coefficient displays temperature and sliding speed dependency, which may be attributed to the surface thermodynamics. It is shown that the local friction depends on the level of strain in the polymer at the contact interface.
引用
收藏
页码:6441 / 6452
页数:12
相关论文
共 37 条
[1]  
[Anonymous], 1983, INTRO POLYM VISCOELA
[2]  
[Anonymous], 1984, CONTACT MECH
[3]   Local study of adhesive properties of viscoelastic materials using an atomic force microscope [J].
Basire, C ;
Fretigny, C .
COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE II FASCICULE B-MECANIQUE PHYSIQUE CHIMIE ASTRONOMIE, 1997, 325 (04) :211-220
[4]   Physical analysis of the state- and rate-dependent friction law. II. Dynamic friction [J].
Baumberger, T ;
Berthoud, P ;
Caroli, C .
PHYSICAL REVIEW B, 1999, 60 (06) :3928-3939
[5]   Physical analysis of the state- and rate-dependent friction law: Static friction [J].
Berthoud, P ;
Baumberger, T ;
G'Sell, C ;
Hiver, JM .
PHYSICAL REVIEW B, 1999, 59 (22) :14313-14327
[6]   Nanoscale tribophysics and tribomechanics [J].
Bhushan, B .
WEAR, 1999, 225 :465-492
[7]  
Bowden, 1951, FRICTION LUBRICATION
[8]   FRICTION LUBRICATION AND WEAR - A SURVEY OF WORK DURING LAST DECADE [J].
BOWDEN, FP ;
TABOR, D .
BRITISH JOURNAL OF APPLIED PHYSICS, 1966, 17 (12) :1521-+
[9]   BOUNDARY LUBRICATION OF THERMOPLASTIC POLYMERS IN MODEL FLUIDS [J].
BRISCOE, BJ ;
STOLARSKI, TA ;
DAVIES, GJ .
TRIBOLOGY INTERNATIONAL, 1984, 17 (03) :129-137
[10]   EFFECT OF PRESSURE ON FRICTIONAL PROPERTIES OF POLYMERS [J].
BRISCOE, BJ ;
TABOR, D .
WEAR, 1975, 34 (01) :29-38