FE-DE coupling analysis of AZ31B sheet solid granule medium forming based on GTN model
- PDF / 2,331,004 Bytes
- 10 Pages / 595.276 x 790.866 pts Page_size
- 14 Downloads / 164 Views
ORIGINAL ARTICLE
FE-DE coupling analysis of AZ31B sheet solid granule medium forming based on GTN model Miao-yan Cao 1,2 & Han Hu 1,2 & Xiang-dong Jia 3 & Xu-Bin Han 1 & Pan-liang Yao 1 Received: 30 March 2020 / Accepted: 20 September 2020 / Published online: 15 October 2020 # Springer-Verlag London Ltd., part of Springer Nature 2020
Abstract In order to solve the problem of forming parts with complex shape and small local feature size, solid granules medium forming (SGMF) was adopted. A part of magnesium alloy AZ31B with double-cone shape was taken as an example to analyze the forming process. The parameters of Gurson–Tvergaard–Needleman (GTN) were identified by an inverse method, comparing the experimental results with the numerical results. Based on the GTN model, the coupled finite element and discrete element (FEDE) method was applied to simulate the forming process of the double-cone part with SGMF technology, and the relevant forming experiments were carried out. The results show that the quality of the workpiece can be improved with different friction coefficient of different area of the part. The fracture behavior and final wall thickness distribution obtained by experiment consist with those by simulation. So, it demonstrates the applicability of the FE-DE method with GTN damage model in analyzing formability of magnesium alloy, and the FE-DE method could embody the medium discrete characteristics fully during SGMF technology. Keywords Solid granule medium forming . GTN model . FE-DE model . AZ31B . Granules medium
1 Introduction Magnesium alloy has the advantages of low density, high specific strength, and no pollution. However, the limit * Miao-yan Cao [email protected] Han Hu [email protected] Xiang-dong Jia [email protected] Xu-Bin Han [email protected] Pan-liang Yao [email protected] 1
College of Mechanical Engineering, Yanshan University, Ministry of Education of China, Qinhuangdao 066004, China
2
Hebei Light Structural Equipment Design and Manufacturing Technology Innovation Center, Yanshan University, Ministry of Education of China, Qinhuangdao 066004, China
3
College of Mechanical and Electronic Engineering, Nanjing Forestry University, Ministry of Education of China, Nanjing 210037, China
drawing ratio of magnesium alloy at room temperature is extremely low because of structural characteristics [1]. Many scholars in China and abroad have improved the formability of magnesium alloy sheet metal by changing the temperature conditions or forming processes. Lei et al. [2] studied the formability and mechanical anisotropy of magnesium alloy sheets at 25–300 °C by uniaxial tensile test and obtained the maximum Erichsen value and ultimate drawing ratio of magnesium alloy by Erichsen and hot drawing tests at 250 °C. Zhang et al. [3] analyzed the rule on the mechanical properties and texture changes under different conditions of rolling characteristics by electron backscattering diffraction in situ tracing observation method at 100–230 °C with magnesium alloy sheet. They revealed the mechanism un
Data Loading...
