L-Shape Bracket

An L-shaped structural bracket: a 60 × 60 square domain with the upper-right quadrant voided (non-design region). The top edge is fixed and a downward point load is applied at the mid-right edge.

Running

ggp optimize --preset l_shape

To save the density image:

ggp optimize --preset l_shape --output-dir docs/_static

The preset uses the AMJax FEM solver by default (fem_solver: amjax).

Result

Optimized density field after 400 MMA iterations (40 % volume fraction).

Problem details

Parameter	Value
Domain	60 × 60 (L-shape)
Mesh	60 × 60 quads
Formulation	Free 2D
Method	AMNA (MNA)
Components	18
r_gp (σ)	1.0
Min thickness	3 elements
Volume fraction	0.40
Algorithm	MMA
Max iterations	400