5. C modeling

5.1. Characteristics of modeling

Loads are applied progressively to the end nodes (X=1) of the model

beam beam:

• step 1: gravity loading

• step 2: thermal loading (rise from 20 to 300°C)

• step 3: irradiation loading (fluence from 20 to 33.1024 neutrons/m²)

• step 4: loading beam with normal force Fx = 1E7n

• step 5: loading beam shear force Fy = 1E7n

• step 6: loading beam shear force Fz = 1E7n

• step 7: reversal loading with normal force Fx = - Fx

• step 8: reversal loading beam shear force Fy = - Fy

• step 9: reversal loading beam shear force Fz = - Fz

  The opposite end (X=0) is the object of a solid body condition allowing a coupling between the unit rotations of the beams and the generalized rotations of the whole (i.e. the grid rotations in the skeleton element model).

5.2. Results

The homogenized force field calculated at the node (X=0) using the beam beam model is established as follows for the nine time steps: