TY - JOUR
T1 - On the load-area relation in rough adhesive contacts
AU - Khajeh Salehani, M.
AU - van Dokkum, J. S.
AU - Irani, N.
AU - Nicola, L.
PY - 2020
Y1 - 2020
N2 - It is well established that, at small loads, a linear relation exists between contact area and reduced pressure for elastic bodies with non-adhesive rough surfaces. In the case of adhesive contacts, however, there is not yet a general consensus on whether or not linearity still holds. In this work evidence is provided, through numerical simulations, that the relation is non-linear. The simulations here presented can accurately describe contact between self-affine adhesive rough surfaces, since they rely on Green's function molecular dynamics to describe elastic deformation and on coupled phenomenological traction-separation laws for the interfacial interactions. The analysis is performed for two-dimensional compressible and incompressible bodies under plane strain conditions. Interfaces with various roughness parameters and work of adhesion are considered.
AB - It is well established that, at small loads, a linear relation exists between contact area and reduced pressure for elastic bodies with non-adhesive rough surfaces. In the case of adhesive contacts, however, there is not yet a general consensus on whether or not linearity still holds. In this work evidence is provided, through numerical simulations, that the relation is non-linear. The simulations here presented can accurately describe contact between self-affine adhesive rough surfaces, since they rely on Green's function molecular dynamics to describe elastic deformation and on coupled phenomenological traction-separation laws for the interfacial interactions. The analysis is performed for two-dimensional compressible and incompressible bodies under plane strain conditions. Interfaces with various roughness parameters and work of adhesion are considered.
KW - Adhesion
KW - Cohesive-zone model
KW - Contact area and load
KW - Self-affine roughness
UR - http://www.scopus.com/inward/record.url?scp=85076515434&partnerID=8YFLogxK
U2 - 10.1016/j.triboint.2019.106099
DO - 10.1016/j.triboint.2019.106099
M3 - Article
AN - SCOPUS:85076515434
SN - 0301-679X
VL - 144
JO - Tribology International
JF - Tribology International
M1 - 106099
ER -