The stretch bending properties of a new Z-section stainless steel profile were investigated by simulation.The causes of the forming defects,such as section distortions and poor contour precision,were analyzed,and the ...The stretch bending properties of a new Z-section stainless steel profile were investigated by simulation.The causes of the forming defects,such as section distortions and poor contour precision,were analyzed,and the corresponding controlling methods were proposed.The results show that the main forming defects for the stretch bending of the Z-section profile were the flange sagging,the sidewall obliquing inward,the bottom surface upwarping,and the bad contour accuracy;the cross-section distortions were mainly induced by the shrinkage of the sidewall,which could be eliminated by increasing the sidewall height of the profile reasonably;the poor contour precision was mainly due to springback,which could be controlled by modifying the die surface based on the springback amount;for the investigated bending beam,the proper sidewall height compensation was 2mm,and the suitable die surface modification amount was 1.2times of the springback amount,when the elongation was 10%of the initial profile length.Stretch bending tests were conducted on a new type of die with adjustable bending surfaces,and high quality components were achieved,which verified the effectiveness of the defect controlling measures.展开更多
The aim of this paper is to interpret the effect of lateral restraint on buckling behaviour of a Z-cross section column subjected to pure axial load.Adequate analytical solutions are compared with the numerical and ex...The aim of this paper is to interpret the effect of lateral restraint on buckling behaviour of a Z-cross section column subjected to pure axial load.Adequate analytical solutions are compared with the numerical and experimental results obtained for specimens both laterally free and those restrained by trapezoidal steel sheeting.Compared to the unrestrained column,a large relative increase of critical loads is detected.Therefore,further optimization of such structural elements is possible.展开更多
基金Item Sponsored by Major Technology Program of Ministry of Industry and Information Technology of China(2009ZX04014-072-01)National Outstanding Youth Science Fund Project of China(51301074)Technology Development Program of Jilin Province of China(20130102021JC)
文摘The stretch bending properties of a new Z-section stainless steel profile were investigated by simulation.The causes of the forming defects,such as section distortions and poor contour precision,were analyzed,and the corresponding controlling methods were proposed.The results show that the main forming defects for the stretch bending of the Z-section profile were the flange sagging,the sidewall obliquing inward,the bottom surface upwarping,and the bad contour accuracy;the cross-section distortions were mainly induced by the shrinkage of the sidewall,which could be eliminated by increasing the sidewall height of the profile reasonably;the poor contour precision was mainly due to springback,which could be controlled by modifying the die surface based on the springback amount;for the investigated bending beam,the proper sidewall height compensation was 2mm,and the suitable die surface modification amount was 1.2times of the springback amount,when the elongation was 10%of the initial profile length.Stretch bending tests were conducted on a new type of die with adjustable bending surfaces,and high quality components were achieved,which verified the effectiveness of the defect controlling measures.
文摘The aim of this paper is to interpret the effect of lateral restraint on buckling behaviour of a Z-cross section column subjected to pure axial load.Adequate analytical solutions are compared with the numerical and experimental results obtained for specimens both laterally free and those restrained by trapezoidal steel sheeting.Compared to the unrestrained column,a large relative increase of critical loads is detected.Therefore,further optimization of such structural elements is possible.
