1. Reference issues#

1.1. Geometry#

The geometry represents a cell that makes up the fuel assemblies. The dimensions are similar to those used for real studies.

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1.2. Modeling A#

This case models the gradual contact of the discretes, to take into account an initial contact and to obtain the right contact forces taking into account the stiffness of the structure and the possible interactions between the discretes.

Discretes are SEG2 with DIS_CONTACT behavior. Finite elements of type D_ PLAN with elastic behavior.

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1.2.1. Material properties#

Stiffness of the discrete elastic K_T_D_L, in the coordinate system LOCAL: \((\mathit{kn},\mathit{kt})=(\mathrm{1.0E+07,}\mathrm{1.0E+09,})\) the Coulomb friction coefficient is \(\mathrm{0,5}\), the gap is a unit ramp between the times \(-\mathrm{1,0}\) and \(\mathrm{0,0}\).

For the discreet the behavior is DIS_CONTACT, with the material DIS_CONTACT

At rest the length of the discretes is \(0.0045\), with \({\mathit{dist}}_{1}=0.0046\), the discrete is compressed with an initial displacement of \(1.0E-04\). The effort in the discretes will depend on the stiffness of the structure.