engleski

Numerical and Experimental Investigation of Anisotropic Material Behaviour in Crimping Process

The wire crimping process is solderless procedure of making an electrical connection between wire strands and terminal. This process is widely used in automotive industry. In order to predict the final shape of a crimped terminal and to reduce costs of production, the numerical simulations are unavoidable. The modelling of such problems using the finite element method is a challenging and complicated task. The nonlinear dynamic models include complex constitutive equations, nonlinear kinematics, friction and large contact pressures, which lead to element overclosure and non-physical behaviour of the model. Copper and copper alloys, with large ductility and strength, are typically used as terminal material. Due to metal rolling process of copper and its alloys, severe anisotropy of mechanical properties may occur. There are only limited experimental data available on the influence of anisotropy and strain rate on the mechanical behaviour of these materials. This paper presents an experimental and numerical study of anisotropic elasto-plastic behaviour of two different copper materials Cu-ETP and CuFe2P. Tensile and compression tests at 0°, 45° and 90° to the rolling direction, and under different strain rates are carried out to determine the Lankford coefficients and hardening coefficients in each direction. Loading process has been acquired by infrared thermography and digital image correlation techniques. Numerical simulations of the process are carried out by using ABAQUS Standard and ABAQUS/Explicit. Computed results are compared with experimental data.

Material anisotropy, IR, DIC, Copper alloy, tensile test

nije evidentirano