In this paper the development of an implicit code is illustrated. The sheet elements as well as the contact description need some special attention. Further, a connection with commercially available CAD packages is essential for a user-friendly range of application. Examples of a simulation of an automotive product and a multi-step deep-drawing process are given. To widen the scope, a start is made with explicit methods with emphasis on contact formulation.
Vreede, P. T., Vreede, P. T., Carleer, B. D., Carleer, B. D., Louwes, M. F. M., Louwes, M. F. M., & Huetink, H. (1995). Finite-element simulation of sheet-forming processes with the help of contact elements on small-scale workstations. Journal of materials processing technology, 50(1-4), 264-276. https://doi.org/10.1016/0924-0136(94)01386-F