Interfacial Instability of Two Bonded Elastic Bodies Driven by Interface or Bulk Residual Stress  

作　　者：C.Q.Ru 

机构地区：[1]Department of Mechanical Engineering,University of Alberta,Edmonton T6G 2G8,Canada

出　　处：《Acta Mechanica Solida Sinica》2023年第6期914-920,共7页固体力学学报（英文版）

基　　金：support of Natural Science and Engineering Research Council of Canada(NSERCRGPIN204992).

摘　　要：Inspired by recent research interest in the interface wrinkling of bonded materials in diverse areas of 3D printing,the present work studies the interfacial instability of two bonded elastic bodies driven by negative interfacial tension or compressible bulk residual stress.For interfacial instability modes decaying exponentially with distance from the interface,the present model is formulated for two bonded elastic half-spaces with a planar interface under plane strain.An explicit expression is given for the wavenumber of interfacial instability driven by negative interfacial tension,and a critical condition is derived for interfacial instability driven by compressive bulk residual stress.The derived results are validated with comparison to known results on surface instability of an elastic half-space,and the role of shear modulus ratio and Poisson’s ratios of two bonded elastic bodies in interfacial instability,an issue to be addressed in literature,is studied with specific reference to material parameters used in some areas of 3D printing.

关 键 词：Interfacial tension Surface tension Interfacial instability 3D printing Interface wrinkling 

分 类 号：O34[理学—固体力学]