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Abstract: Sheet
metal flexible-die forming process is the combination of sheet metal
deformation and flexible-die deformation. contact description can be
differentiated into two categories, contact between sheet metal and
rigid die, and contact between sheet metal and flexible
pressure-carrying medium. The penalty function method is used to
evaluate the contact force and a finite element formulation and solution
algorithm are developed to solve the contact problem between two
different type element: Mindlin axisymmetric shell element and solid
element. The static-explicit time integration algorithm is employed to
limit the incremental step to a size, which will keep the contact state
steady. It is illustrated through analyzing the sheet metal deformation
by applying the visco-elastoplasticity as flexible pressure-carrying
medium that the solution algorithm is valid. The solution algorithm
developed can also be used to solve the frictional contact between sheet
metal and other type flexible pressure-carrying medium.
Key words: Sheet
metal flexible-die forming fem Frictional contact Static
explicit algorithm
CLC No: TB24
TG302
国家自然科学基金资助项目(50275035). Received 20050512,
received in revised form 20060124
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