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Article Dans Une Revue International Journal of Solids and Structures Année : 2016

Non-linear simulation of coiling accounting for roughness of contacts and multiplicative elastic-plastic behavior

Résumé

In this paper numerical simulations of coiling (winding of a steel strip on itself) and uncoiling are developed. Initial residual stress field is taken into account as well as roughness of contacts and elastic-plastic behavior at finite strains, considering the Tresca yield function and isotropic hardening. The main output is the residual stress field due to plastic deformations during the process. This enables to quantify additional flatness defects. The presented coiling simulation relies on a modeling strategy that consists in dividing each time step into two sub-steps. Each sub-step can be solved semi-analytically and numerical optimizations enable to obtain a general solution. Thus reasonable computation times are reached and parametric studies can be performed in order to develop coiling strategies considering the process parameters. Comparisons with previous models from the literature are presented. Moreover the comparison with a Finite Element simulation presents the same order of magnitude, however it shows that direct computations using classical FE codes are difficult to perform in terms of computation times and stability if an explicit integration scheme is chosen. Numerical results are also given in order to determine the effect of some parameters such as roughness, yield stress, applied force, strip crown or mandrel's radius.
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Dates et versions

hal-01331722 , version 1 (14-06-2016)

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Daniel Weisz-Patrault, Alain Ehrlacher, Nicolas Legrand. Non-linear simulation of coiling accounting for roughness of contacts and multiplicative elastic-plastic behavior. International Journal of Solids and Structures, 2016, 94-95, pp.1-20. ⟨10.1016/j.ijsolstr.2016.05.012⟩. ⟨hal-01331722⟩
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