diff --git a/fem_2d.py b/fem_2d.py
index 07f2264f1a00acfddfabac7f06b148a189b34ade..814674c6323002cd294f5b599248ff1c5b3015b3 100644
--- a/fem_2d.py
+++ b/fem_2d.py
@@ -176,10 +176,8 @@ class Structure2DPlaneStress:
             node_ids = self.elements[element_id].node_ids
             k_e = self.elements[element_id].get_k_mat(self.thickness,
                                                       self.c_mat)
-            indexes = ((node_ids[0], node_ids[0]),
-                       (node_ids[0], node_ids[1]),
-                       (node_ids[1], node_ids[0]),
-                       (node_ids[1], node_ids[1]))
+            # First [0,0] component of k_e
+