2. Benchmark solution

This test makes it possible to test the blocking in transverse shear as well as the effects of the stiffness of the rotation around the normal. It allows you to validate the choice COEF_RIGI_DRZ = 1. E—05, the default value for this coefficient. This multiplying factor makes it possible to assign a fictitious stiffness around the normal of the plate elements by multiplying the minimum stiffness in other directions by this coefficient in order to avoid singular stiffness matrices.

2.1. Benchmark results

The reference results are derived from a calculation using finite elements by volume:

Value of the deflection in \(C\): \(4.93\mathrm{inches}\) is \(1.252E\mathrm{-}01m\).

2.2. Uncertainties about the solution

A few percent depending on the refinement of the mesh.

2.3. Bibliographical references

1. Raasch Challenge for Shell Elements, N.F. Knight Jr., AIAA Journal, Journal, Vol. 35, No. 2, 1997, pp375-381.