Peeling behavior of a bio-inspired nano-film on a substrate

A peeling model is proposed to analyze the peeling properties of bio-mimetic nano-films using the finite element method (FEM) and theoretical approach. The influences of the nano-film’s adhesion length, thickness, elastic modulus, roughness and peeling angle on the peeling force were considered as w...

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Bibliographic Details
Published in:International journal of solids and structures 2010-07, Vol.47 (14), p.1952-1960
Main Authors: Peng, Z.L., Chen, S.H., Soh, A.K.
Format: Article
Language:English
Subjects:
Adhesion
Adhesion length
Bio-inspired nano-film
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
Finite element method
Fundamental areas of phenomenology (including applications)
Mathematical models
Mechanical and acoustical properties
Mechanical and acoustical properties
adhesion
Modulus of elasticity
Nanocomposites
Nanomaterials
Nanostructure
Peeling
Peeling angle
Peeling force
Peeling model
Physical properties of thin films, nonelectronic
Physics
Solid mechanics
Solid surfaces and solid-solid interfaces
Static elasticity (thermoelasticity...)
Structural and continuum mechanics
Surfaces and interfaces
thin films and whiskers (structure and nonelectronic properties)
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Summary:A peeling model is proposed to analyze the peeling properties of bio-mimetic nano-films using the finite element method (FEM) and theoretical approach. The influences of the nano-film’s adhesion length, thickness, elastic modulus, roughness and peeling angle on the peeling force were considered as well as the effect of the viscoelastic behavior. It has been found that the effective adhesion length, at which the peeling force attained maximum, was much smaller than the real length of nano-films; and the shear force dominated in the case of smaller peeling angles, whereas, the normal force dominated at larger peeling angles. The total peeling force decreased with an increasing peeling angle. Two limiting values of the peeling-off force can be found in the viscoelastic model, which corresponds to the smaller and larger loading rate cases. The effects of nano-film thickness and Young’s modulus on peeling behaviors were also discussed. The results obtained are helpful for understanding the micro-adhesion mechanisms of biological systems, such as geckos.
ISSN:0020-7683
1879-2146
DOI:10.1016/j.ijsolstr.2010.03.035