Regularization of shear banding and prediction of size effects in manufacturing operations: A micromorphic plasticity explicit scheme - Archive ouverte HAL Access content directly
Journal Articles International Journal of Material Forming Year : 2022

Regularization of shear banding and prediction of size effects in manufacturing operations: A micromorphic plasticity explicit scheme

Abstract

Abstract Good quality manufacturing operation simulations are essential to obtain reliable numerical predictions of the processes. In many cases, it is possible to observe that the deformation localizes in narrow areas, and since the primary deformation mode is under shear, these areas are called shear bands . In classical continuum mechanics models, the deformation localization may lead to spurious mesh dependency if the material locally experiences thermal or plastic strain softening. One option to regularize such a non-physical behavior is to resort to non-local continuum mechanics theories. This paper adopts a scalar micromorphic approach, which includes a characteristic length scale in the constitutive framework to enforce the plastic strain gradient theory to regularize the solution. Since many manufacturing process simulations are often assessed through finite element methods with an explicit solver to facilitate convergence, we present an original model formulation and procedure for the implementation of the micromorphic continuum in an explicit finite element code. The approach is illustrated in the case of the VPS explicit solver from ESI GROUP. According to the original formulation, we propose an easy way to implement a scalar micromorphic approach by taking advantage of an analogy with the thermal balance equation. The numerical implementation is verified against the analytical solution of a semi-infinite glide problem. Finally, the correctness of the method is addressed by successfully predicting size effects both in a cutting and a bending tests.
Fichier principal
Vignette du fichier
russo22explicit.pdf (2.76 Mo) Télécharger le fichier
Origin Publisher files allowed on an open archive

Dates and versions

hal-03605920 , version 1 (11-03-2022)

Identifiers

Cite

Raffaele Russo, Vikram Phalke, Didier Croizet, Mustapha Ziane, Samuel Forest, et al.. Regularization of shear banding and prediction of size effects in manufacturing operations: A micromorphic plasticity explicit scheme. International Journal of Material Forming, 2022, 15 (3), pp.21. ⟨10.1007/s12289-022-01657-9⟩. ⟨hal-03605920⟩
39 View
38 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More