Deformation limits of polymer coated metal sheets

M.J.W.J.P. Van Den Bosch, P.J.G Schreurs, M.G.D. Geers

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Abstract

Polymer coated metals are increasingly used by the packaging and automotive industry. During industrial deformation processes (drawing, roll-forming, bending etc.) the polymer-metal laminate is highly deformed at high deformation rates. These forming conditions can affect the mechanical integrity e.g. the forming of cracks and delamination. The aim of this numerical-experimental project is to get an understanding of and develop predictive capabilities in the forming limits of polymer coated metal. The numerical part consists of plain-strain deep-drawing and bending simulations of a metal substrate coated on two sides with a polymer layer. The material model used for the polymer and the metal is the general compressible Leonov model. A cohesive zone element is implemented into a finite element package to simulate delamination. It is inserted at the interface between the metal and the two polymer layers and describes a nonlinear relation between the opening displacement and the corresponding stress. This relation highly depends on the polymer-metal system used and needs to be determined by experiments. Experiments are performed to obtain cohesive zone parameters and verify the simulation results. The cohesive zone parameters are determined by several experiments. The surfaces, layers and interfaces are studied in-situ during deformation processes.

Original languageEnglish
Title of host publication11th International Conference on Fracture 2005, ICF11
Pages2061-2065
Number of pages5
Volume3
Publication statusPublished - 2005
Event11th International Conference on Fracture (ICF 2005) - Turin, Italy
Duration: 20 Mar 200525 Mar 2005
Conference number: 11

Conference

Conference11th International Conference on Fracture (ICF 2005)
Abbreviated titleICF 2005
CountryItaly
CityTurin
Period20/03/0525/03/05

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