Extended evaluation of Erichsen cupping test results by means of laser speckle
Andrzej Kocańda , Cezary Jasiński
AbstractErichsen 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%.
|Journal series||Archives of Civil and Mechanical Engineering, ISSN 1644-9665|
|Publication size in sheets||0.5|
|Keywords in Polish||Próba Erichsena, speckle laserowe, lokalizacja odkształcenia, pękanie, LN-IE|
|Keywords in English||Erichsen cupping test, laser speckle, localized necking, fracture, LN-IE|
|Score|| = 30.0, 16-07-2020, ArticleFromJournal|
= 30.0, 16-07-2020, ArticleFromJournal
|Publication indicators||= 7; : 2016 = 2.068; : 2016 = 2.216 (2) - 2016=1.922 (5)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.