期刊
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
卷 134, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jmps.2019.103764
关键词
2D materials; Exfoliation; Peeling; Fluid; Fracture
资金
- EU through ERC Grant FlexNanoFlow [715475]
- JSPS KAKENHI [JP18K18065]
- European Commission under the Graphene Flagship Core2 [785219]
- FET Proactive Neurofibres grant [732344]
- Italian Ministry of Education, University and Research (MIUR) under the Departments of Excellence grant [ARS01-01384-PROSCAN, PRIN-20177TTP3S, L.232/2016]
- EU through Marie Curie Career Integration Grant FlowMat [618335]
- European Research Council (ERC) [715475] Funding Source: European Research Council (ERC)
We present a micromechanical analysis of flow-induced peeling of a layered 2D material suspended in a liquid, for the first time accounting for realistic hydrodynamic loads. In our model, fluid forces trigger a fracture of the inter-layer interface by lifting a flexible flap of nanomaterial from the surface of a suspended microparticle. We show that the so far ignored dependence of the hydrodynamic load on the wedge angle produces a transition in the curve relating the critical fluid shear rate for peeling to the non-dimensional adhesion energy. For intermediate values of the non-dimensional adhesion energy, the critical shear rate saturates, yielding critical shear rate values that are drastically smaller than those predicted by a constant load assumption. Our results highlight the importance of accounting for realistic hydrodynamic loads in fracture mechanics models of liquid-phase exfoliation. (C) 2019 Elsevier Ltd. All rights reserved.
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