Vodička, Roman; Mantič, Vladislav An energy based formulation of a quasi-static interface damage model with a multilinear cohesive law. (English) Zbl 1369.49047 Discrete Contin. Dyn. Syst., Ser. S 10, No. 6, 1539-1561 (2017). Summary: A new quasi-static and energy based formulation of an interface damage model which provides interface traction-relative displacement laws like in traditional trilinear (with bilinear softening) or generally multilinear cohesive zone models frequently used by engineers is presented. This cohesive type response of the interface may represent the behaviour of a thin adhesive layer. The level of interface adhesion or damage is defined by several scalar variables suitably defined to obtain the required traction-relative displacement laws. The weak solution of the problem is sought numerically by a semi-implicit time-stepping procedure which uses recursive double minimization in displacements and damage variables separately. The symmetric Galerkin boundary-element method is applied for the spatial discretization. Sequential quadratic programming is implemented to resolve each partial minimization in the recursive scheme applied to compute the time-space discretized solutions. Sample 2D numerical examples demonstrate applicability of the proposed model. MSC: 49N10 Linear-quadratic optimal control problems 74R20 Anelastic fracture and damage 74S15 Boundary element methods applied to problems in solid mechanics 90C20 Quadratic programming 90C90 Applications of mathematical programming Keywords:cohesive contact; trilinear cohesive law; debonding; delamination; interface fracture; interface damage; mixed mode crack; symmetric Galerkin BEM; sequential quadratic programming Software:BEAN PDFBibTeX XMLCite \textit{R. Vodička} and \textit{V. Mantič}, Discrete Contin. Dyn. Syst., Ser. S 10, No. 6, 1539--1561 (2017; Zbl 1369.49047) Full Text: DOI References: [1] L. 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