TY  - JOUR
AU  - Persson, Bo
AU  - Scaraggi, M.
TI  - Theory of adhesion: Role of surface roughness
JO  - The journal of chemical physics
VL  - 141
IS  - 12
SN  - 1089-7690
CY  - Melville, NY
PB  - American Institute of Physics
M1  - FZJ-2015-04088
SP  - 124701
PY  - 2014
AB  - We discuss how surface roughness influences the adhesion between elastic solids. We introduce a Tabor number which depends on the length scale or magnification, and which gives information about the nature of the adhesion at different length scales. We consider two limiting cases relevant for (a) elastically hard solids with weak (or long ranged) adhesive interaction (DMT-limit) and (b) elastically soft solids with strong (or short ranged) adhesive interaction (JKR-limit). For the former cases we study the nature of the adhesion using different adhesive force laws (F ∼ u −n , n = 1.5–4, where u is the wall-wall separation). In general, adhesion may switch from DMT-like at short length scales to JKR-like at large (macroscopic) length scale. We compare the theory predictions to results of exact numerical simulations and find good agreement between theory and simulation results.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000342844100055
C6  - pmid:25273455
DO  - DOI:10.1063/1.4895789
UR  - https://juser.fz-juelich.de/record/201794
ER  -