! ----------------------------------------------------------------------
! M10 - English course download: 10_challenge.mac
! Follow the matching English lesson for explanations and task details.
! Commands, parameter names, file names, CSV keys, and result tokens are preserved.
! ----------------------------------------------------------------------

/CLEAR,START                        ! Change the load and document the effect on the curve.
/FILNAME,m10_challenge,1
/UNITS,SI

! Base case (deliverable): tip_force=-10000 N, beam_h=0.04 m.
! Challenge: tip_force=-12000 N with the same geometry.
!
! TODO 1: copy 10_static_nonlinear.mac to a clean directory.
! TODO 2: change tip_force=-12000 and run from a clean session.
! TODO 3: predict whether geom_dev_ratio increases or decreases and why.
! TODO 4: record uy_linear, uy_geom, and geom_dev_ratio in an extra row
!         of the CSV or in a short note.
! TODO 5: confirm n_converged=n_substeps and equilibrium <0.5 %.
! TODO 6: repeat in a second clean directory and verify reproducibility.
!
! Analytical references (F=-12000 N):
! uy_ref = F*L^3/(3*E*I) = -8.92857143E-3 m
! expected geom_dev_ratio: larger than the base case (~10 % with F=-10000).
!
! Inherited tolerances:
! equilibrium < 0.5 %
! geom_dev_ratio between 3 % and 25 %
! plastic_dev_ratio >= 5 % (base plastic case only)

FINISH