Computational modeling of surface phenomena in soft-wet materials

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:46

Article

Standulescu, Ilinca¹  Dolbow, John E.²  Zauscher, Stefan³ 

[1] Univ Illinois, Dept Civil & Environm Engn, Urbana, IL 61801 USA

[2] Duke Univ, Dept Civil & Environm Engn, Durham, NC 27708 USA

[3] Duke Univ, Dept Mech Engn & Mat Sci, Durham, NC 27708 USA

关键词: Finite element formulations;    Mortar contact discretization;    Tribological properties;    Soft-wet materials;    Hydrogels;   

DOI  :  10.1016/j.ijsolstr.2008.11.007

来源: Elsevier

【 摘 要 】

We consider the problem of extracting tribological information from experimental observations of contact with soft-wet materials. Particular attention is placed on simulating the response of two rotating cylinders of soft specimens placed in frictional contact, with a variable coefficient of friction dependent on the relative sliding velocity. The bulk behavior is modeled by means of a finite deformation viscoelasticity formulation, with constitutive parameters taken to be representative of hydrogels. We focus on the modeling of the surface behavior and employ a mortar-finite element contact formulation. Through a series of numerical studies, we demonstrate the strong sensitivity of the results to the choice of interfacial constitutive parameters. The difficulties of extracting such parameters using only experimental data and approximate analytical expressions are also examined. (C) 2008 Elsevier Ltd. All rights reserved.

【 授权许可】

Free