Journal
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
Volume 109, Issue 3-4, Pages 629-644Publisher
SPRINGER LONDON LTD
DOI: 10.1007/s00170-020-05712-0
Keywords
Flexible-die; Magnetorheological fluid; Mechanism; Magnetic field condition; Bulging behavior
Funding
- National Natural Science Foundation of China [51805309, 51275130, 51905156]
- Natural Science Basic Research Program of Shaanxi [2019JQ-770]
- Shaanxi Provincial Education Department [18JK0112]
- Natural Science Foundation of Shaanxi University of Science and Technology [2017BJ-14]
Ask authors/readers for more resources
To provide intelligent control options during sheet metal forming process, magnetorheological (MR) fluid has been applied as a property-adjustable flexible-die. However, the mechanism of the magnetic field effect on the sheet deformation behavior is not clear yet. In this paper, to clarify the deformation mechanism, the bulging behavior of thin-walled Al1060-O sheet was systematically investigated through experiment and numerical simulation. Special attention was paid to the effect of magnetic field on loading curve, bulge dome height, and thickness strain distribution. Results showed that the maximum bulging force increased obviously with the increase of magnetic flux density. The bulge dome height and thickness strain were influenced by magnetic field condition and magnetic particle content synthetically. Appropriate magnetic field condition and magnetic particle content can improve formability. However, excessive magnetic flux intensity and magnetic particle volume fraction, for example,B = 0.20 T and phi = 46%, would lead to premature rupture. Finite element analysis was adopted to assist in explaining the bulging behavior. Detailed analysis indicated that the flow stress variations caused by magnetic field affect the stress states, velocity distribution of MR fluid, and sheet/MR fluid contact condition, further leading to different stress and strain distribution of sheet metal. Finally it causes the great difference in specimen geometry and wall thickness distribution.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available