Reverse The Process Of Simulation Optimization Techniques

In this thesis, the ideal forming theory and its corresponding application aspects are importantly investigated. It also provides a theoretical algorithm of the multiple forming processes for the applications of ideal forming theory in the blank design and the forming process analysis.The simulations of the blank forming process is always a very pop question in the domain of plasticity forming. It has very important significance as to making certain the figure of the blank roughcast calculating strain and stress, establishing reasonable forming craft and designing mold. In this thesis, the ideal forming theory and its corresponding application aspects are primarily investigated. Based on the ideal forming theory and single forming process, it builds the finite element modeling of multiple forming process and brings forward a simulation algorithms about the axisymmetric parts. In this thesis, it investigates a simulation algorithm of multiple forming process by adopting the minimum plastic work path, that is the ideal forming path, and putting to use the ideal forming theory when the product is specified.Aimed at the blank parts based on the ideal forming, the involved FE formulae based on the kinematics of the linear triangle membrane elements, with the node coordinates or node displacements of elements being unknown, are derived. Using the Newton-Raphson iteration method, the node coordinates of elements on the reference configuration or the current configuration, can be obtained efficiently. Founded on the FE algorithms about the multiple forming process, the object-oriented FEM program about the algorithms of the multiple forming process is developed.