Parameter Identification of Swift Law Using a FEMU-Based Approach and an Innovative Heterogeneous Mechanical Test

Abstract

The reliability and predictive accuracy of forming simulation depend on both the material constitutive model and its inherent parameters. As opposed to conventional sheet metal material testing, heterogeneous mechanical tests provide more complex strain and stress states. Heterogeneous mechanical tests can be used to efficiently predict the material behavior in forming processes due to an improvement in the time required and accuracy in the identification of the parameters. The present work aims at identifying the Swift hardening law parameters of a dual-phase steel by means of an optimum-designed interior notched specimen that presents several strain and stress states simultaneously. The finite element model updating (FEMU) technique was used for the identification of parameters, by comparing a DIC-measured virtual material with numerical results iteratively DIC-filtered.

Identification of Sheet Metal Constitutive Parameters Using Metamodeling of the Biaxial Tensile Test on a Cruciform Specimen

“…However, the absence of heterogeneity in the stress/strain states dictates the use of multiple mechanical tests to fully characterize the mechanical behaviour of the material [12,13]. To address this issue, several researchers have developed heterogeneous tests to characterize the material's behaviour [14][15][16][17][18][19]. In [14], the authors designed a virtual heterogeneous test to characterize the mechanical behaviour of thin sheets using finite element simulations with an anisotropic yield criterion.…”

“…The identified material parameters were validated by comparison with an experimental database of quasi-homogeneous classical tests, demonstrating the reliability of the proposed approach. Otherwise, in [15], the authors focused on identifying the parameters of the Swift hardening law for a dual-phase steel using an optimally designed notched specimen and the Finite Element Model Updating (FEMU) technique. This involved an iterative comparison between DIC measured material data and numerically simulated results.…”

Experimental Analysis of the Mechanical Characteristics of Aluminum Alloys (AlSi8Cu3)

“…Further research by Goodall and others [17][18] proposed an empirical expression that yielded excellent results. Arfa et al [19] based their study on the mechanical properties and the microstructure of aluminum alloys reinforced with Al7075 at 6, 9, and 12% by weight of WCCo.…”