Prediction Method of Void Distribution near Punched Surface of Medium-Carbon Steel Sheet using Scrap

Ken SAITO; Chikara INOUE; Jin IKEGAWA; Kazuhiko YAMAZAKI; Sota GOTO; Masato TAKAMURA; Shunsuke MIHARA; Shinsuke SUZUKI

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Prediction Method of Void Distribution near Punched Surface of Medium-Carbon Steel Sheet using Scrap

机译：用废料分布近碳钢板冲孔表面的空隙分布预测方法

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The objective of this study was to confirm the validity of the prediction method of void distribution near a punched surface of a blank (holder side) by observing the void distribution of scrap (hole side). It is important to know the exact void number density and void area fraction through an appropriate evaluation method such as that mentioned, just where a crack occurs owing to stretch-flange deformation in the same individual sample because the crack and the void behaviors fluctuate from sample to sample and with position, even under the same punching condition. This study investigated the correlation of void distribution near punched fracture surfaces of the blank and scrap in medium-carbon steel. The voids near the punched fracture surfaces of the blank and the scrap were measured using SEM images. The voids of the blank and the scrap were distributed point-symmetrically with respect to the center of the fracture surface. The equivalent plastic strain and the stress triaxiality that were analyzed with FE analysis were also distributed point-symmetrically. The void distribution of scrap was shifted to the sheared surface side, compared to that of the blank. To predict the void distribution of the blank using the scrap, the void distribution of the scrap with the burr side as a reference point was approximated by a cubic function. Furthermore, the void distribution of the scrap shifted to the burr side. The prediction method of void distribution near punched surface by scrap was validated by considering stress and strain during punching.

机译：本研究的目的是通过观察废料（孔侧）的空隙分布来确认空白（夹持器侧）的冲孔表面附近的空隙分布的预测方法的有效性。重要的是要通过诸如所提到的适当的评估方法来了解精确的空隙数密度和空隙区域分数，仅在由于相同的单独样品中的拉伸法兰变形而发生裂缝，因为裂缝和空隙行为从样品波动即使在相同的冲压条件下也可以样本和位置。本研究研究了中碳钢中坯料和废料的冲孔裂缝表面附近的空隙分布的相关性。使用SEM图像测量坯料的冲孔骨折表面和废料附近的空隙。空白和废料的空隙相对于断裂表面的中心分布点对称。用Fe分析分析的等效塑性菌株和应力三轴性也分布对称分布。与坯料相比，废料的空隙分布移到剪切表面侧。为了预测使用废料的空白的空隙分布，通过立方体函数近似为参考点的毛刺侧的废气侧的空隙分布。此外，废料的空隙分布移到毛刺侧。通过考虑冲压应力和应变通过废料验证了通过废料附近的空隙分布的预测方法。

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来源
《ISIJ international》 |2021年第1期|417-423|共7页
作者
Ken SAITO; Chikara INOUE; Jin IKEGAWA; Kazuhiko YAMAZAKI; Sota GOTO; Masato TAKAMURA; Shunsuke MIHARA; Shinsuke SUZUKI;
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作者单位

Department of Applied Mechanics and Aerospace Engineering Faculty of Science and Engineering Waseda University 59-305 Okubo 3-4-1 Shinjukuku Tokyo 169-8555 Japan;

Department of Applied Mechanics and Aerospace Engineering Faculty of Science and Engineering Waseda University 59-305 Okubo 3-4-1 Shinjukuku Tokyo 169-8555 Japan;

Department of Materials Science Faculty of Science and Engineering Waseda University 59-305 Okubo 3-4-1 Shinjukuku Tokyo 169-8555 Japan;

Steel Research Laboratory JFE Steel Corporation 1 Kawasaki-cho Chuo-ku Chiba 260-0835 Japan;

Steel Research Laboratory JFE Steel Corporation 1-1 Minamiwatarida-cho Kawasaki-shi Kanagawa 210-0855 Japan;

RIKEN Center for Advanced Photonics 2-1 Hirosawa Wako-shi Saitama 351-0198 Japan;

RIKEN Center for Advanced Photonics 2-1 Hirosawa Wako-shi Saitama 351-0198 Japan;

Department of Applied Mechanics and Aerospace Engineering Faculty of Science and Engineering Waseda University 59-305 Okubo 3-4-1 Shinjukuku Tokyo 169-8555 Japan Department of Materials Science Faculty of Science and Engineering Waseda University 59-305 Okubo 3-4-1 Shinjukuku Tokyo 169-8555 Japan Kagami Memorial Research Institute of Materials Science and Technology Waseda University 2-8-26 Nishiwaseda Shinjuku-ku Tokyo 169-0051 Japan;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种 eng
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关键词
punching; medium-carbon steel; hole expansion test; void; stress triaxiality; equivalent plastic strain;

机译：冲孔;中碳钢;孔膨胀试验;空白;压力三轴;等同的塑料应变;

Prediction Method of Void Distribution near Punched Surface of Medium-Carbon Steel Sheet using Scrap

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