design for weight and strength (Reisgen et al. 2010). Patchwork blank is a variation of tailored blank which is
commonly used for local reinforcement applications in the auto-body structures. A welded patchwork blank is made
of one or more pieces of reinforcing sheet metal (patches) lap-welded onto the mainsheet. The potential applications
of TWBs and patchwork blanks are illustrated in Fig. 1.