Prediction of the Theoretical Strain Limit for the Bulging of Sheet Metals by the Approximate Analytic Method

Guang Fan Gao; Liang Sun; Jian Wei Chao; Ming Jun Pang

doi:10.4028/www.scientific.net/AMM.459.100

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 459Prediction of the Theoretical Strain Limit for the...

Prediction of the Theoretical Strain Limit for the Bulging of Sheet Metals by the Approximate Analytic Method

Abstract:

For the bulging of sheet metals under hydraulic pressure on concave surface, constitutive relation, static equilibrium conditions, and approximate geometrical relation were discussed about the source of calculation error. Dimensionless deflection at the center of sheet was used as the intermediate variable, and a simple but efficient nomographic algorithm addressed for strain limit is presented in this paper. The results of the calculation were compared with that of the uniaxial tensile test, the bulge test, and the Finite Element Analysis (FEA). This method has the potential for industrial applications such as pressure forming, bulge test, and rupture disc manufacturing.