optimization for inv_free(undo some changes)

Author: Roushelfy

4_friction/simulator.py

@@ -10,8 +10,8 @@
 # simulation setup
 side_len = 1
 rho = 1000      # density of square
-k = 4e4         # spring stiffness
-n_seg = 10       # num of segments per side of the square
+k = 2e4         # spring stiffness
+n_seg = 4       # num of segments per side of the square
 h = 0.01        # time step size in s
 DBC = []        # no nodes need to be fixed
 # ANCHOR: slope_setup

6_inv_free/simulator.py

@@ -14,7 +14,7 @@
 E = 1e5         # Young's modulus
 nu = 0.4        # Poisson's ratio
 # ANCHOR_END: lame_param
-n_seg = 6      # num of segments per side of the square
+n_seg = 4      # num of segments per side of the square
 h = 0.01        # time step size in s
 DBC = [(n_seg + 1) * (n_seg + 1)]       # dirichlet node index
 DBC_v = [np.array([0.0, -0.5])]         # dirichlet node velocity