A method for the experimental determination of the J-integral on double edge-notched flat tensile specimen

It can be shown that from deformation values which may easily be found the J-integral-load-line trace of a large tensile specimen can be determined and that initiation values of the J-integral obtained from a small specimen (here CT-specimens) can also be transferred to other specimen shapes and sizes. Since this method is based on a formulation independent of geometry, it is likely that it can be applied successfully to more complex specimens and even component geometries.