Non-uniform shrinkage analysis of round billet using element-free Galerkin method
Lai-qiang Cai1,2, Xu-dong Wang1,2, Man Yao1,2
1 School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China; 2 Key Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province), Dalian University of Technology, Dalian 116024, Liaoning, China
Non-uniform shrinkage analysis of round billet using element-free Galerkin method
Lai-qiang Cai1,2, Xu-dong Wang1,2, Man Yao1,2
1 School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China; 2 Key Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province), Dalian University of Technology, Dalian 116024, Liaoning, China
摘要 An element-free Galerkin thermal–mechanical calculation model for the solidification and shrinkage of round billet was established. The non-uniform heat flux measured in the plant trial was used as the boundary condition to simulate and analyze the deformation of solidified shell. The results indicate that the maximum and minimum shrinkages of the round billet at mold outlet are 0.78 and 0.21 mm, respectively, with apparent non-uniform characteristic. The local high-heat-flux region substantially dominates the non-uniformity of shell shrinkage, and the larger shrinkage usually derives from the high heat flux between the solidified shell and the mold in the circumferential direction. Also, the shrinkage on the shell surface has an immediate connection with the equivalent stress. Specifically, the shrinkage is more closely related to the radial stress component than the circumferential stress component.
Abstract：An element-free Galerkin thermal–mechanical calculation model for the solidification and shrinkage of round billet was established. The non-uniform heat flux measured in the plant trial was used as the boundary condition to simulate and analyze the deformation of solidified shell. The results indicate that the maximum and minimum shrinkages of the round billet at mold outlet are 0.78 and 0.21 mm, respectively, with apparent non-uniform characteristic. The local high-heat-flux region substantially dominates the non-uniformity of shell shrinkage, and the larger shrinkage usually derives from the high heat flux between the solidified shell and the mold in the circumferential direction. Also, the shrinkage on the shell surface has an immediate connection with the equivalent stress. Specifically, the shrinkage is more closely related to the radial stress component than the circumferential stress component.
Lai-qiang Cai,Xu-dong Wang,Man Yao. Non-uniform shrinkage analysis of round billet using element-free Galerkin method[J]. Journal of Iron and Steel Research International, 2022, 29(01): 80-87.
2022, Vol. 29 
