Challenge: double the length

Predict the effect on deflection when L is doubled and demonstrate the result within tolerance.

Challenge — Double the length

Keep the cross-section, material, force and mesh_h=0.05 m, but use:

beam_l=2.0

The new topology will have 80 elements and 246 nodes. The theory predicts:

uy_ref_2 = −3.04762E−3 m
uy_2/uy_1 = 8

x_section_2 = 0.4 m
sigma_ref_2 = 19.2 MPa
sigma_2/sigma_1 = 2

Both FEA ratios should approach the predictions within the 5 %, and the both cases must continue to satisfy equilibrium.