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Proceedings Paper

Mechanical properties testing of sheet metal by hydraulic bulge test
Author(s): Autthasit Dimarn; Charn Thanadngarn; Vichit Buakaew; Yongyuth Neamsup
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Paper Abstract

The understanding of material characterization is necessary for metal forming process because the characteristic of material was directly related to the die designs. The die designers could adopt their knowledge to choose the appropriate material and realize the formability of material using in the process. Furthermore, they could understand when the undesired phenomena occurred during the forming process. Normally, the tensile test has been used to determine the characteristic of the material because this method was easy and cheap. However, the drawback of this tensile test is the leak of reasonable result because the specimen was deformed in only one direction, which is not coherence to the real forming process. In the practical process, the deformation of material was complicate and required the suitable experiment to describe the phenomenon of metal forming. Therefore, this research studied the formability of sheet metal by hydraulic bulge test. The sheet metal used in automobile industries was employed. The circular specimen was installed on the hydraulic bulge test machine, and the hydraulic system provided the pressure to form the specimens into the dome shape. Then the height of the dome was continuously increased until it broke. Based on this experiment, the dome height and forming pressure were used to characterize the relationship of stress and strain of material. The results obtained from this study revealed that the characteristic of material was more reliable and coherence to the sheet metal forming process.

Paper Details

Date Published: 2 June 2014
PDF: 11 pages
Proc. SPIE 9234, International Conference on Experimental Mechanics 2013 and Twelfth Asian Conference on Experimental Mechanics, 92340K (2 June 2014); doi: 10.1117/12.2054257
Show Author Affiliations
Autthasit Dimarn, King Mongkut's Univ. of Technology North Bangkok (Thailand)
Charn Thanadngarn, King Mongkut's Univ. of Technology North Bangkok (Thailand)
Vichit Buakaew, Srinakharinwirot Univ. (Thailand)
Yongyuth Neamsup, Sammitr Motors Manufacturing Public Company Ltd. (Thailand)


Published in SPIE Proceedings Vol. 9234:
International Conference on Experimental Mechanics 2013 and Twelfth Asian Conference on Experimental Mechanics
Somnuk Sirisoonthorn, Editor(s)

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