A study of techniques in the evaluation of springback and residual stress in hydroforming

被引：0
|
作者：
Bruni, C. [1 ]
Celeghini, M. [2 ]
Geiger, M. [2 ]
Gabrielli, F. [1 ]
机构：
[1] Department of Mechanics, Polytechnic University of Marche, Via Brecce Bianche, I-60131 Ancona, Italy
[2] Department of Manufacturing Technology, University of Erlangen-Nuremberg, Egerlandstraße 11, D-91058 Erlangen, Germany
来源：
International Journal of Advanced Manufacturing Technology | 2007年 / 33卷 / 9-10期
关键词：
The increasing need for high strength complex hollow bodies for automotive application is pushing towards the use of sheet hydroforming techniques in conjunction with high strength steels. Unfortunately high strength steels are characterised by high springback levels. In this paper the springback and residual stresses have been analysed by means of laboratory trials carried out using the double sheet hydroforming technique. The attention has been focused on the upper blank of TRIP800 steel. The analysis has been performed using different approaches: i) characterisation of sample accuracy by means of a 3D coordinate measuring machine using a new proposed method based on the standard deviation calculation; ii) FE-analysis of both hydroforming and springback stages using an implicit FEM code; iii) residual stress evaluation by means of X-ray diffraction and laser cutting techniques. The effect of pressure; die insert geometry and friction at the blank holder on springback and residual stresses have been analysed and discussed in detail. © 2006 Springer-Verlag London Limited;
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Journal article (JA)
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页码：929 / 939
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