Superplastic process modeling of plane strain components with complex shapes
- 23 Downloads
Computational process models using membrane element method are developed in this paper for the superplastic forming of plane strain boxes with complex cross-sectional details. Many practical superplastic components manufactured in industry have sloping sidewalk with die bottoms either corrugated and/or at angles to the sides. The new method is used to develop process models for such configurations and the resulting software can be used interactively in a computer. The method is useful to a designer in the parametric study of die geometry, die wall friction, initial thickness, and material property, or to determine if a specific geometry is suitable for superplastic forming. The kinematics of deformation are illustrated, and the numerical results of the model are compared with continuum finite element solutions and also with experimental data.
KeywordsThickness Distribution Thickness Profile Membrane Element Material Shaping Technology Sheet Element
Unable to display preview. Download preview PDF.
- 1.A. K. Ghosh and C. H. Hamilton, “Superplastic Forming of a Long Rectangular Box Section-Analysis and Experiment,”Proceedings of American Society for Metals on Process Modeling-Fundamentals and Applications to Metals, pp. 303–331 (1978).Google Scholar
- 3.N. Chandra and R. E. Goforth, “An Analytical Model for Axisymmetric Superplastic Metal Forming Processes,”TMS Technical Paper No. A87-11 (1987).Google Scholar
- 4.N. Chandra and B. Roy, “Membrane Element Analysis of Axisymmetric and Non-Axisymmetric Superplastic Metal Forming Processes,”Superplasticity and Superplastic Forming, Ed. C. H. Hamilton, N. E. Paton, pp. 283–289 (1988).Google Scholar
- 5.N. Chandra, K. Chandy, and S. C. Rama, “Computational Model for Superplastic Pans of Complex Geometry with Friction,”Superplasticity in Aerospace II, The Metallurgical Society Inc. (1990).Google Scholar
- 7.J. Bonet, R. D. Wood, and O. C. Zienkiewicz, “Finite Element Modelling of the Superplastic Forming of Thin Sheet,”Superplasticity and Superplastic Forming, Ed. C. H. Hamilton, N. E. Paton, pp. 291–295 (1988).Google Scholar
- 8.J. M. Story, “Incorporation of Sliding Friction into a Closed Form Model of Plane Strain Superplastic Forming,”Superplasticity and Superplastic Forming, Ed. C. H. Hamilton, N. E. Paton, pp. 297–302 (1988).Google Scholar