Modeling the ductile fracture and the plastic anisotropy of DC01 steel at room temperature and low strain rates

10th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes

Tuninetti, V.^1,2 ; Yuan, S.^3 ; Gilles, G.^4 ; Guzmán, C.F.^3 ; Habraken, A.M.^3,5 ; Duchêne, L.^3

Department of Mechanical Engineering, Universidad de la Frontera, Temuco, Chile^1

Technical Department, Distribuidora Cummins Chile S.A., Quilicura, Región Metropolitana, Chile^2

ArGEnCo Department, MS2F Division, University of Liège, Liège, Belgium^3

Samtech SA, A Siemens Company, Digital Factory Division, Product Lifecycle Management, Simulation and Test Solutions, Angleur, Belgium^4

Fonds de la Recherche Scientifique - FNRS, Belgium^5

关键词: Finite element codes;    GTN damage models;    Low strain rates;    Material parameter;    Numerical predictions;    Plastic anisotropy;    Prediction of failures;    Single point incremental forming;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/734/3/032075/pdf
DOI  :  10.1088/1742-6596/734/3/032075

来源: IOP

【 摘 要 】

This paper presents different extensions of the classical GTN damage model implemented in a finite element code. The goal of this study is to assess these extensions for the numerical prediction of failure of a DC01 steel sheet during a single point incremental forming process, after a proper identification of the material parameters. It is shown that the prediction of failure appears too early compared to experimental results. Though, the use of the Thomason criterion permitted to delay the onset of coalescence and consequently the final failure.