|
Abstract: An
optimization method for preform die shape in non-isothermal metal
forming using plastic finite element method, sensitivity analysis and
engineering optimization algorithm is presented. The preform die shape
is represented by cubic B-spline. The control points of the B-spline are
used as the design variables. By optimizing preform die shape, net-shape
forging process can be realized, and flashless final forging with
complete die fill and without defect can be obtained. The optimization
procedure of preform die shape is given. The sensitivity of nodal
velocity and temperature with respect to design variable is developed.
Finally, the forming process of an axisymmetric disk as an optimization
example is given.
Key words: Preform design Shape optimization Sensitivity analysis
Finite element method
CLC No: TG305
山东省优秀中青年科学家科研奖励基金资助项目([2000]401). Received 20020408, received in revised
form 20020916
|