Characterization and modeling of damage behavior of a casting aluminum wheel considering inhomogeneity of microstructure and microdefects

Investigation into the anisotropic damage behavior of LA103Z Mg‐Li alloy rolling sheet using X‐ray computed tomography and numerical modeling

“…The GTN damage model has been applied widely to predict the ultimate mechanical properties of the alloys in recent decades. [25][26][27][28] The calibration of the GTN damage model relied on the macroscopic mechanical tests generally in previous works. 27,[29][30][31] Because the several parameters in the GTN damage model have physical significance, such as f N to describe the micro void volume fraction at the beginning of nucleation while f c to describe the critical volume fraction for micro void growth and coalescence, 32 the calibration of the parameters considering the anisotropic damage behavior via the XCT method is a further development of the GTN model.…”

“…As the supplementary method of the experimental investigation, the numerical modeling method is used in this work to discuss and reveal the damage behavior together. The GTN damage model has been applied widely to predict the ultimate mechanical properties of the alloys in recent decades 25–28 . The calibration of the GTN damage model relied on the macroscopic mechanical tests generally in previous works 27,29–31 .…”

Simulation of Fracture Performance of Die-Cast A356 Aluminum Alloy Based on Modified Mohr–Coulomb Model

“…For example, Huichi et al [5] established a coupled gas-liquid-solid multiphase flow model through ANSYS software to analyze and control the quenching deformation of lightweight cast aluminum alloy wheels. Kong et al [6] investigated the effects of microdefects and the stress state on the failure behavior of cast aluminum alloy A356 by experimental and numerical methods. Considering the distribution of porosity within the die-cast components, Zhang et al [7] investigated the failure characteristics of the die-cast aluminum alloy Aural-2 by experimental and numerical methods.…”

“…Most studies [9][10][11] have suggested that void growth and aggregation-type microscopic fracture mechanisms can accurately illustrate the macroscopic fracture behavior under monotonic loading conditions. According to the interaction of plasticity and damage criteria, the currently applied damage mechanics models can be divided into two groups: coupled models and uncoupled models [6,12,13]. Among the coupled models, the Gurson-Tvergaard-Needleman (GTN) model considers the formation and growth process of voids, and has been widely applied in various applications [14,15].…”

“…The calibrated MMC failure model can more accurately simulate the failure behavior of aluminum alloy in the U-bending experiment. From previous studies [1,6,18,19,23,24], the failure criterion for predicting the fracture behavior of metals can be characterized by the stress triaxiality and Lode angle parameter.…”