ABSTRACT
Anchorage parts for automobile safety belts and other safety parts must resist shock loadings without breaking. They are typically made from High Strength Low Alloy sheet metal and fabricated by blanking and bending operations. The study of their behaviour during fabrication and their resulting mechanical properties has been conducted experimentally and numerically. The experimental results were used to validate the numerical simulation. The resulting material damage is taken into account by a user subroutine in the Abaqus Standard Finite Element code. Damage is one of the objective functions intervening in the forming process of safety parts as well as in the prediction of unbending and shock loads. This study is based on the use of “the design of experiments technique” and the approximated representation by response surfaces. For unbending operations representative of dynamic shock loading conditions, the objective functions represent the maximum unbending load and maximum damage. The parameters that represent the die radius Rd and the sheet/die clearance C are optimised in order to obtain the most resistant safety part possible.
REFERENCES
L. Kurt, Handbook of Metal Forming, First edition, McGraw-Hill Book Company, U.S.A (1985).
Davies RJ., Liu YC., ‘Control of springback in flanging operation’, Journal of applied Metalworking, 3, (1984) 142–147
Bahloul R., Ben-Elechi S., Potiron A., ‘Optimisation of springback predicted by experimental and numerical approach by using response surface methodology’, Journal of Materials Processing Technology, 173, (2006) 101–110
Bahloul R., Mkaddem A., Dal Santo Ph., Potiron A., ‘Sheet metal bending optimisation using response surface method, numerical simulation and design of experiments’, Int. Journal of Mechanical Sciences, 48, (2006) 991–1003
Todoroki A. and Ishikawa T., ‘Design of experiments for stacking sequence optimizations with genetic algorithm using surface approximation’, Composites Structures, 64, (2004) 349–357
Chou IN. and Hung C., ‘Finite element analysis and optimization of springback reduction’, Int. Journal of Machine Tools and Manufacture, 39, (1999) 517–536
Lemaitre J., ‘A continuous damage mechanics model for ductile fracture’, Journal of Engineering Materials and Technology, 107, (1985) 83–89
M.A. Criesfield, ‘Non linear finite element analysis of solids and structures, Vol.1, Wiley (1991).
Marques J.M.M.C., ‘Stress computation in elastoplasticity’, Engineering computations, 1, (1984) 42–51
Mkaddem A., ‘Expérimentation et simulation du pliage de tôles H.L.E. Prévision du comportement en service des pièces pliées’, Thèse de doctorat, ENSAM Angers 16 décembre 2003
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Bahloul, R., Dal Santo, P. & Potiron, A. Optimisation of the bending process of High Strength Low Alloy sheet metal: numerical and experimental approach. Int J Mater Form 1 (Suppl 1), 113–116 (2008). https://doi.org/10.1007/s12289-008-0033-0
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DOI: https://doi.org/10.1007/s12289-008-0033-0