Abstract
Tailor welded blanks is a well-established strategy to form light weight sheet metal components at reduced cost by welding different sheet blanks prior to forming. The choice of blank material and thickness depends upon the functional requirements such as strength and stiffness. Post forming springback is one of the important issues for consideration when designing the forming process using tailor welded blanks. The springback caused by the release of stored elastic energy is complicated due to simultaneous interference of time and strain path dependent plastic deformation. In addition to these known issues, the varying properties of the blanks and the interfacing weld line further complicate the springback behaviour. Due to the limitations involved, the springback of TWB components can be best analyzed using hybrid optimization methods combining deterministic finite element simulation and heuristic data driven models. This chapter reviews the complexities involved in understanding springback of tailor welded components. The ideas are discussed through a case study using the standard benchmark springback problem.
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