Static Bending of Cantilever Beam

[Pouria-AZD]

Dear all,

Considering to have a test case as a static analysis of an isotropic cantilever beam with a point moment applied at the tip which is demonstrated in Wang et al. this problem demonstrates the ability of BeamDyn to analyze an isotropic beam with no initial curvature, and with highly nonlinear deflections. Indeed, the displacements are so large that the beam bends into a circular shape.
Now my problem is that in my case with 10m beam length with steel ASTM properties I could successfully get results for λ=0.4 to λ=1.6 with two 5th-order LSFE and also matches well with the analytical results but I couldn't obtain the results for λ=2.0 due to this warning below:

** Load may be too large, BeamDyn will attempt to solve with additional steps.
Load_Step=10
Maxium number of load steps reached.
Solution does not converge after the maximum number of load steps. **

While in Wang et al it shows BeamDyn capability to bends into a circular shape, is there any solution for this type of error in order to fix the problem or not?

Thank you in advance.