Assignment of characteristics ================================ For these discrete elements, it is necessary to assign geometric characteristics that are complementary to the mesh data. These data are defined with the AFFE_CARA_ELEM command associated with the following factor keywords: * **DISCRET** Allows you to define and assign the values of stiffness, mass, or damping matrices. Supported models: 2D_ DIS_T, 2D_ DIS_TR * **ORIENTATION** Allows you to define and assign a local coordinate system. Supported models: 2D_ DIS_T, 2D_ DIS_TR