In stretch forming, forming limit curve (FLC) is defined as a locus of all the limit strains in different strain paths of the sheet metal.

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The Forming Limit Curve (FLC) is indeed defined as the boundary curve that delineates the limit strains for different strain paths that sheet metal can undergo before the onset of necking or failure, making it a crucial tool in analyzing and predicting the formability of sheet metal in stretch forming processes.

In Stretch Forming, Forming Limit Curve (FLC) Is Defined as a Locus