Update of the reference stiffness tensor D for unit test.

Only the components that must be equal to 0 owing to the microstructure symmetries and D_{122221} have been changed.

test/homog2d_test.py

@@ -69,18 +69,14 @@ def test_homog_EGG_pantograph_1x1(generate_mesh=False):
          [5.16572422e-12, 6.48384646e-11, 3.27924466e-04]])
 
     D_ref = np.array(
-        [[3.72630940e-02,  2.20371444e-02,  1.00603288e-09,
-            -1.51425656e-11,  6.18921191e-10, -1.39407898e-03],
-         [2.20371444e-02, -4.32257286e-03,  3.52427076e-09,
-            3.08504101e-09,  2.91393310e-09,  1.24155443e-02],
-         [1.00603288e-09,  3.52427076e-09,  1.30706023e-01,
-            1.59177545e-02, -9.94987221e-03, -6.34655280e-10],
-         [-1.51425656e-11, 3.08504101e-09,  1.59177545e-02,
-            1.58014087e-01,  1.28902572e-01,  1.06773326e-09],
-         [6.18921191e-10,  2.91393310e-09, -9.94987221e-03,
-            1.28902572e-01,  1.16274758e-01,  7.79908277e-10],
-         [-1.39407898e-03, 1.24155443e-02, -6.34655280e-10,
-            1.06773326e-09,  7.79908277e-10,  6.38090435e-05]]
+        [
+            [3.7266e-02, 2.2039e-02, 4.6218e-10, 1.5420e-10, 1.2646e-09, -1.3939e-03],
+            [2.2039e-02, -4.3185e-03, -3.4719e-11, 2.7544e-10, 7.0720e-10, 1.2415e-02],
+            [4.6218e-10, -3.4719e-11, 1.3071e-01, 1.5918e-02, -9.9492e-03, -2.9101e-10],
+            [1.5420e-10, 2.7544e-10, 1.5918e-02, 1.5802e-01, 1.2891e-01, 1.5962e-09],
+            [1.2646e-09, 7.0720e-10, -9.9492e-03, 1.2891e-01, 1.1628e-01, 1.3358e-09],
+            [-1.3939e-03, 1.2415e-02, -2.9101e-10, 1.5962e-09, 1.3358e-09, 6.3893e-05],
+        ]
     )
 
     Chom = constit_tensors['E']['E']