Prediction of Fracture Behavior of 6061 Aluminum Alloy Based on GTN Model

Fengjuan Ding; Tengjiao Hong; Youlin Xu; Xiangdong Jia

doi:10.3390/ma15093212

Prediction of Fracture Behavior of 6061 Aluminum Alloy Based on GTN Model

Materials (Basel). 2022 Apr 29;15(9):3212. doi: 10.3390/ma15093212.

Authors

Fengjuan Ding^{1

2}, Tengjiao Hong^{1

3}, Youlin Xu², Xiangdong Jia²

Affiliations

¹ College of Mechanical Engineering, Anhui Science and Technology University, Bengbu 233100, China.
² College of Mechanical and Electronic Engineering, Nanjing Forestry University, Nanjing 210037, China.
³ College of Mechanical Engineering, Yangtze University, Jingzhou 434023, China.

Abstract

To determine the Gurson-Tvergaard-Needleman (GTN)damage model parameters of 6061 aluminum alloy after secondary heat treatment, the uniaxial tensile test was carried out on the aluminum alloy circular arc specimen, and the mechanical properties parameters and the load-displacement curve of aluminum alloy tube were obtained. With the help of the finite element reverse method, scanning electron microscope and a orthogonal test method, the GTN damage model parameters (f₀, f_N, f_C, and f_F) were calibrated, and their values were 0.004535, 0.04, 0.1, and 0.2135, respectively. Then the shear specimen and notch specimen were designed to verify the damage model, the results show that the obtained GTN damage model parameters can effectively predict the fracture failure of 6061 aluminum alloy after secondary heat treatment during the tensile process.

Keywords: 6061 aluminum alloy; GTN model; fracture; numerical simulation; orthogonal experiments.

Grants and funding

CX2018027/Youth Science and Technology Innovation Foundation of Nanjing Forestry University