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Abstract: Because
of the coupled deformation characteristic between viscous medium and
sheet metal, however, it is difficult to analyze the deformation
behavior of sheet metal under the interaction of viscous adhesive
stress. Based on the above situation, viscous medium tensile test is
carried out by using a kind of polymethylvinylpolymer as viscous
pressure-carrying medium. Using the viscous adhesive stress as tensile
stress, sheet metal deformation can be measured directly. The influence
of viscous adhesive stress on the deformation of sheet specimen is
investigated and some effect factors of viscous adhesive stress are
analyzed preliminarily. Experimental results show that the viscous
adhesive stress increases with an increasing of pressure difference on
the surface of sheet metal, flowing velocity and hydrostatic pressure of
viscous medium. Research results provide a good foundation for utilizing
viscous adhesive stress to improve the formability of sheet metal in
viscous pressure forming.
Key words: Viscous pressure forming (VPF)
Viscous adhesive stress Coupled deformation
CLC No: TG316
国家自然科学基金资助项目(50275035). Received 20051220, received in revised form 20060629
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