• stress intensity factors for edge delamination of elastic nano-films subject to chemical loading

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    • تاریخ ارائه: 1393/11/01
    • تاریخ انتشار در تی پی بین: 1393/11/01
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     stress intensity factors for edge delamination of elastic nano-films subject to chemical loading
     
    delamination of elastic thin films from their substrate under thermal or lattice mismatch strain is a classical problem in fracture mechanics. in this paper, we consider this problem where a nanoscale thin film is subject to a combined lattice mismatch strain and a chemical strain induced by solute insertion. the chemical loading differs from its classical counterpart in that the solute-induced strain itself depends on stress distribution in the film, giving rise to a fully-coupled chemo-elasticity problem. in this paper, we adopt a linearized chemo-mechanical model to study the stress intensity factors at the edge of an elastic nano-film on an elastic thick substrate. within membrane approximation, the problem is reduced to finding solute concentration and stress in a semi-infinite membrane adhered to a substrate. the governing equation is a singular integral equation which is solved semianalytically. the effect of chemo-mechanical coupling on the stress intensity factors is presented.

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