A pyramid sheet has been used in experiments and three-dimensional finite element simulation to study the edge cracks and effects of width on AZ31 sheet under rolling. Results show that the edge cracks of Mg sheet com...A pyramid sheet has been used in experiments and three-dimensional finite element simulation to study the edge cracks and effects of width on AZ31 sheet under rolling. Results show that the edge cracks of Mg sheet comply with the Normalized Crockroft ＆ Latham theory. It can be predicted by D=-0.124＋0.09X - 0.008X2, if D ;〉 0, the edge cracks occur. The sheet shearing deformation at the edge brings about cracks. The strain rate changes periodically with different X. With initial width increases, the recrystallized grain size decreases. The finite element model has been validated by the experiment results.展开更多
基金supported by 973 National Grand Theoretical Research Program(No.2007CB613700)National Sci & Technol Support Program (No.2007BAG06B04)+1 种基金Chongqing Sci & Technol Program (CSTC,2009AB4008)National Natural Science Foundation of China (No.50725413)
文摘A pyramid sheet has been used in experiments and three-dimensional finite element simulation to study the edge cracks and effects of width on AZ31 sheet under rolling. Results show that the edge cracks of Mg sheet comply with the Normalized Crockroft ＆ Latham theory. It can be predicted by D=-0.124＋0.09X - 0.008X2, if D ;〉 0, the edge cracks occur. The sheet shearing deformation at the edge brings about cracks. The strain rate changes periodically with different X. With initial width increases, the recrystallized grain size decreases. The finite element model has been validated by the experiment results.
