Extended evaluation of Erichsen cupping test results by means of laser speckle

被引：0
|
作者：
A. Kocańda
C. Jasiński
机构：
[1] Warsaw University of Technology,Faculty of Production Engineering, Department of Metal Forming and Foundry
来源：
Archives of Civil and Mechanical Engineering | 2016年 / 16卷
关键词：
Erichsen cupping test; Laser speckle; Localized necking; Fracture; LN-IE;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Erichsen cupping test has usually been used to determine the height of the cup at the moment of sheet metal fracture, defined as the Erichsen Number IE. The paper presents a proposal of using Erichsen cupping test to determine the additional parameter–the height of the cup LN-IE at the moment of localized necking in sheet metal, which usually precedes fracture of sheet metal. For this purpose, a method of localized necking detection was developed. It is based on the phenomenon of laser speckle. The results of height measurements were presented for three different grades of sheet metals used in the automotive industry: 5754 H22 aluminum alloy, DC04 deep drawing steel, and Dogal 800DP high strength steel. The differences in cup heights at the moments of localized necking (LN-IE) and fracture (IE) of the tested sheet metals were in the range of 0–8%.
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页码：211 / 216
页数：5
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