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Damage and Failure of Metal/Fibre‐Reinforced Polymer Tensile Specimens with Inelastic Interface
Author(s) -
Konchakova Natalia,
Mueller Ralf,
Barth FranzJosef
Publication year - 2010
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201010052
Subject(s) - materials science , composite material , orthotropic material , welding , ultimate tensile strength , finite element method , aluminium , hardening (computing) , polymer , strain hardening exponent , structural engineering , layer (electronics) , engineering
Hybrid specimens of metal and fibre‐reinforced polymer are applied in automotive and aerospace industry. The simulation and analysis of damage of such engineering structures is the focus of this research. The investigation includes a computation of the extension of single lap tensile specimen, produced by ultrasonic metal welding. The specimen is manufactured from CF‐PA66 ‐ fibre‐reinforced polymer and AlMg3 (AA5754), which is used as a metallic joining partner. The aluminium substrate is treated as an elastoplastic material. The polymer composite generally shows an orthotropic elastic behaviour. The interface material has been numerically modeled as an elastoplastic material with linear hardening, coupled with Lemaitre‐type damage. The finite element method is used for the investigation of so‐called interface elements. The geometry of the interface is a consequence of the welding sonotrode geometry. The behaviour of specimens with square and ring interface geometry are analysed. The influence of the interface geometry on the mechanical properties of the joint is shown. The increase of the damage parameter and the development of failure are described for both cases. (© 2010 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)