Mukherjee, BikramjitDillard, David A.Moore, Robert BowenBatra, Romesh C.2017-03-032017-03-032016-04-010143-7496http://hdl.handle.net/10919/75232Wavy or undulatory debonding is often observed when a confined/sandwiched elastomeric layer is pulled off from a stiff adherend. Here we analyze this debonding phenomenon using a cohesive zone model (CZM). Using stability analysis of linear equations governing plane strain quasi-static deformations of an elastomer, we find (i) a non-dimensional number relating the elastomer layer thickness, h, the long term Young's modulus, <i>E_&#8734;</i>, of the interlayer material, the peak traction, <i>T_c</i>, in the CZM bilinear tractionseparation (TS) relation, and the fracture energy, <i>G_c</i>, of the interface between the adherend and the elastomer layer, and (ii) the critical value of this number that provides a necessary condition for undulations to occur during debonding. For the elastomer modeled as a linear viscoelastic material with the shear modulus given by a Prony series and a rate-independent bilinear TS relation in the CZM, the stability analysis predicts that a necessary condition for a wavy solution is that <i>T_c²h=G_cE_&#8734;</i> exceed 4:15. This is supported by numerically solving governing equations by the finite element method (FEM). Lastly, we use the FEM to study three-dimensional deformations of the peeling (induced by an edge displacement) of a flexible plate from a thin elastomeric layer perfectly bonded to a rigid substrate. These simulations predict progressive debonding with a fingerlike front for sufficiently confined interlayers when the TS parameters satisfy a constraint similar to that found from the stability analysis of the plane strain problem.114 - 127 (14) page(s)In CopyrightTechnologyEngineering, ChemicalMaterials Science, MultidisciplinaryEngineeringMaterials ScienceFingerlike instabilityWavy or undulatory debond frontCohesive zone model (CZM)Elastomeric interlayerDebondingPRESSURE-SENSITIVE-ADHESIVESORTHOGONAL ELASTIC WEDGESFILMFRACTUREINSTABILITYCRACKDELAMINATIONSIMULATIONSPATTERNSArticle - Refereedhttps://doi.org/10.1016/j.ijadhadh.2015.12.00666Dillard, DA [0000-0002-2903-9318]