Initial blank estimation of an anisotropic rectangular box by a new inverse isogeometric analysis

This paper develops an inverse isogeometric analysis in order to estimate the initial blank in sheet metal forming processes. In the present study, the same (Bspline/ NURBS) basis functions are used not only for drawing a final part, but also for estimation of the initialblank. In other words, only one modeling and analysis representation is required, in contrast to inverse FEM. Therefore, the computation time decreases significantly which is of importance at the initial stages of design. This model deals with minimization of potential energy,deformation theory of plasticity and infinitesimal deformation relations with considering anisotropic effects. In this approach, the effects of changing the final part geometry and material property can be observed online on the formability of the part. For the purpose ofthe evaluations, the results of the developed technique have been compared with the experimental results existing in the literature for a rectangular box problem. The results obtained by the presented model and those obtained by the experimental report reveal reasonableaccuracy with decreased computational costs.

کلیدواژه ها:

Isogeometric Analysis (IGA) ، One-Step Inverse Isogeometric Analysis (IIGA) ، Sheet Metal Forming ، Rectangular Box