For such purpose, I have reviewed the paper

*"Beam Benchmark Problems For Validation Of Flexible Multibody Dynamic Codes"*by A.L. Schwab and J.P. Meijgaard.

The following is an outline of the proposed in this paper:

- 1.- Introduction
- The paper presents some basic problems for which analytic solution is known
- 2.- Beam benchmark problems
- Tests to be performed
- Static analyses in small displacements for the validation of the correct formulation of elastic forces
- Static analyses for large displacements and rotations, on straight and curved beams
- Buckling tests in normal, lateral and torsional directions to check the way geometric stiffness due to prestress is taken into account
- Eigenfrequency analyses for the validation of the combination of elastic forces and distributed inertia forces
- Mesh refinement tests for all the above to prove convergence of the results
- Underlying model: Timoshenko beam with large displacements and large rotations
- Finite Element Method Beam Element
- Shear flexible based on the elastic line concept
- Slender beam, cross section doubly symmetric
- Large rotation and displacements, but small deformations
- Isotropic and linearly elastic
- BEAM model: standard strain-displacement relations
- BEAMNL model: additional quadratic terms included in the strain-displacement for better performance in the pre-stress cases

The implementation of such a benchmark over some of the most popular engines revised lately would surely make a nice contribution.