I will describe why i did this reseach work.
The FLC is not sufficient to evaluate the formability for AHS Steel since this material exhibits fracture without localized necking stage.
The shear fracture behavior of AHSS can not be predicted by the conventional forming limit curve (FLC).
The developed fracture curves (FCs) can evaluate the formability of AHSS and shear fracture behavior.
The strain based FLC depends on strain history and strain path.
The developed stress based FC is independent from this issue.