Development of new hole expansion testing method

被引：4

作者：

Kim, Hyunok ^{[1
]}

Shang, Jianhui ^{[1
]}

Beam, Kevin ^{[2
]}

Samant, Anoop ^{[2
]}

Hoschouer, Cliff ^{[3
]}

Dykeman, Jim ^{[4
]}

机构：

[1] EWI Forming Ctr, 1250 Arthur E Adams Dr, Columbus, OH 43221 USA

[2] KTH Parts Ind Inc, K Grp Tech R&D Ctr, 8205 Business Way, Plain City, OH 43064 USA

[3] SHILOH, 5580 Wegman Dr, Valley City, OH 44280 USA

[4] Honda R&D Amer Inc, 21001 State Route 739, Raymond, OH 43067 USA

来源：

NUMISHEET 2016: 10TH INTERNATIONAL CONFERENCE AND WORKSHOP ON NUMERICAL SIMULATION OF 3D SHEET METAL FORMING PROCESSES, PTS A AND B | 2016年 / 734卷

关键词：

D O I：

10.1088/1742-6596/734/3/032025

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

This paper introduces a new hole expansion (HE) testing method that could be more relevant to the edge cracking problem observed in stamping advanced high strength steel (AHSS). The new testing method adopted a large hole diameter of 75 mm compared to the standard hole diameter of 10 mm. An inline monitoring system was developed to visually monitor the hole edge cracking during the test and synchronize the load-displacement data with the recorded video for capturing the initial crack. A new hole expansion testing method was found to be effective in evaluating the edge cracking by considering the effects of material properties and trimming methods. It showed a much larger difference, up to 11%, of the HE ratio between DP980 and TRIP780 compared to the standard HE testing method giving less than a 2% difference.

引用

页数：4

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