Abstract
This paper studies surface instability of a coated semi-infinite linear elastic body interacting with another flat rigid body through surface van der Waals (vdW) forces under plane strain conditions. The emphasis is on the effect of the surface coating layer on the wavelength of surface wrinkling. It is shown that the surface of the coated elastic half-plane is always unstable even in the presence of a very stiff coating layer. However, the numerical results show that the stiff coating layer has a significant effect on the wavelength of the surface instability mode and can effectively prevent the surface from short-wavelength wrinkling. In particular, the surface tangential displacement associated with the surface instability vanishes when the elastic half-plane is incompressible. In this case, the in-plane rigidity of the coating layer has no effect on surface instability while the bending stiffness of the coating layer has an effect on the wave-length of the surface instability mode. Furthermore, the Poisson’s ratio of elastic half-plane has a significant role in the surface instability and the associated wave-length.
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C. Q. Ru is on leave from the University of Alberta, Edmonton, T6G. 2G8, Canada.
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Qian, H., Xu, K.Y. & Ru, C.Q. Surface Forces Driven Wrinkling of an Elastic Half-Space Coated with a Thin Stiff Surface Layer. J Elasticity 86, 205–219 (2007). https://doi.org/10.1007/s10659-006-9083-z
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DOI: https://doi.org/10.1007/s10659-006-9083-z