Modeling adhesive contacts under mixed-mode loading

Salehani, Mohsen Khajeh; Irani, Nilgoon; Nicola, Lucia

doi:10.1016/j.jmps.2019.06.010

Cited by 25 publications

(8 citation statements)

References 30 publications

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“…In this study, only the purely normal contact problem associated with mode-I crack is modeled. The present model can also be extended to other complex cases in mode-I, II, and III and/or with bi-material interface cracks, e.g., the purely normal contact considering the interfacial friction (Khajeh Salehani et al, 2018) and adhesive friction (Khajeh Salehani et al, 2019). The calculation of tangential surface displacement, as well as new crack propagation and nucleation criterion, must be added to the present model.…”

Section: Discussionmentioning

confidence: 99%

Adhesive Boundary Element Method Using Virtual Crack Closure Technique

Zhou

2021

Front. Mech. Eng.

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In this study, a new adhesive contact model is built upon a boundary element method (BEM) model developed by Pohrt and Popov (2015). The strain energy release rate (SERR) on the edge of the bonding interface is evaluated using Virtual Crack Closure Technique (VCCT) which is shown to have better accuracy and weaker mesh-size dependency than the closed-form SERR formula derived by Pohrt and Popov. A composite delamination criterion is proposed for crack nucleation and propagation. Numerical results predicted by the present model are in good agreement with the analytical solutions of two classic problems, namely, the axisymmetric parabolic contact and the sinusoidal waviness contact in the plane strain condition. The model of Pohrt and Popov can achieve a similar accuracy for the axisymmetric parabolic contact where the mesh grid is non-conforming to the crack front. Once the conforming mesh grid is used, the accuracy of their model is significantly deteriorated, especially at high work of adhesion and high mesh density. In both BEM models, however, the crack nucleation is found to be mesh-dependent which may be solved by introducing an upper limit for the tensile normal traction.

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Section: Discussionmentioning

confidence: 99%

Adhesive Boundary Element Method Using Virtual Crack Closure Technique

Zhou

2021

Front. Mech. Eng.

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“…1(a)), assuming steady-state conditions and Amontons' microscopic friction. Although some of the issues raised here have already been addressed in line contacts [22][23][24], load-area and other relations do not generalize from line to areal contacts, neither in simple indenter geometries [25] nor in randomly rough contacts [26,27], so that the effect of roughness on the friction coefficient can differ between the two cases. More importantly, the analysis of how coupling affects leakage cannot be addressed in line contacts, since they automatically seal in the lateral (sliding) direction, while they are open in the transverse direction.…”

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confidence: 91%

Significance of Elastic Coupling for Stresses and Leakage in Frictional Contacts

Müller,

Müser,

Carbone

et al. 2023

Phys. Rev. Lett.

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We study how the commonly neglected coupling of normal and in-plane elastic response affects tribological properties when Hertzian or randomly rough indenters slide past an elastic body. Compressibility-induced coupling is found to substantially increase maximum tensile stresses, which cause materials to fail, and to decrease friction such that Amontons' law is violated macroscopically even when it holds microscopically. Confinement-induced coupling increases friction and enlarges domains of high tension. Moreover, both types of coupling affect the gap topography and thereby leakage. Thus, coupling can be much more than a minor perturbation of a mechanical contact.

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“…[26,[29][30][31][32][33] or using finite elements (see e.g. [27,34,35]). For our model, it is more convenient and computationally inexpensive to resort to an analytical model.…”

Section: Introductionmentioning

confidence: 99%