High-speed blanking of copper alloy sheets : material modeling at high rates of strain and numerical prediction of the effects of processing parameters - Archive ouverte HAL Access content directly
Journal Articles Journal de Physique IV Proceedings Year : 2006

High-speed blanking of copper alloy sheets : material modeling at high rates of strain and numerical prediction of the effects of processing parameters

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Abstract

To optimize the blanking process of thin copper sheets (≈1. mm thickness), it is necessary to study the influence of the process parameters such as the punch-die clearance and the wear of the punch and the die. For high stroke rates, the strain rate developed in the work-piece can be very high. Therefore, the material modeling must include the dynamic effects.For the modeling part, we propose an elastic-viscoplastic material model combined with a non-linear isotropic damage evolution law based on the theory of the continuum damage mechanics. Our proposed modeling is valid for a wide range of strain rates and temperatures. Finite Element simulations, using the commercial code ABAQUS/ Explicit, of the blanking process are then conducted and the results are compared to the experimental investigations. The predicted cut edge of the blanked part and the punch-force displacement curves are discussed as function of the process parameters. The evolution of the shape errors (rollover depth, fracture depth, shearing depth, and burr formation) as function of the punch-die clearance, the punch and the die wear, and the contact punch/die/blank-holder are presented. A discussion on the different stages of the blanking process as function of the processing parameters is given. The predicted results of the blanking dependence on strain-rate and temperature using our modeling are presented (for the plasticity and damage). The comparison our model results with the experimental ones shows a good agreement.
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hal-00447199 , version 1 (22-09-2016)

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C. Husson, Saïd Ahzi, Loïc Daridon. High-speed blanking of copper alloy sheets : material modeling at high rates of strain and numerical prediction of the effects of processing parameters. Journal de Physique IV Proceedings, 2006, 134, pp.1189-1194. ⟨10.1051/jp4:2006134181⟩. ⟨hal-00447199⟩
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