But === Calculate the stress intensity factors of a dynamic transient problem solved by decomposition on a modal basis. The calculation of stress intensity factors, functions of time, is done from the intensity factors of modal constraints (from CALC_G [:ref:`U4.82.03 `]) and modal contribution factors from the dynamic transient calculation (operator DYNA_VIBRA [:external:ref:`U4.53.21 `]). This operator can be called in 2D as well as in 3D. The crack can be meshed or non-meshed (crack X- FEM). This operator is only valid if it is possible to make a linear combination of the intensity factors of the modal constraints. In particular, the crack must always remain open: the contact between the lips of the crack is in fact not taken into account. Produces a table_sd_aster data structure.