Analysis of the Internal Pressure in Tube Hydroforming and Its Experimental Investigation

材料科学技术（英）, 2006, 22(2): 284-288.

^1, , ^2, , ^4, , ^5, , ^6,

1.Department of Plasticity Technology, Shanghai Jiao Tong University, Shanghai 200030, China

2.School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China

4.School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China

5.School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China

6.School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China

基金项目: 国家自然科学基金(59975021)

Analysis of the Internal Pressure in Tube Hydroforming and Its Experimental Investigation

Keywords： Tube hydroforming

The internal pressure of the process was studied theoretically and experimentally. The external load character and internal stress character of tube hydroforming were discussed first. Then, according to the characters,the function and classification of internal pressure were presented in general. Base on the stress analysis, its effect on the yield criterion and calculation formula were also researched and derived. To verify the correction of the theoretical analysis and derived formula, experiments with different internal pressures were carried out and the result was compared and discussed. It demonstrates that internal pressure plays an important role in tube hydroforming and theory and formula discussed and derived by this paper are feasible in practice.

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Analysis of the Internal Pressure in Tube Hydroforming and Its Experimental Investigation

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