diff --git a/python/tests/test_grid_filters.py b/python/tests/test_grid_filters.py index 1c21fb4c7..2ca239b84 100644 --- a/python/tests/test_grid_filters.py +++ b/python/tests/test_grid_filters.py @@ -2,6 +2,7 @@ import pytest import numpy as np from damask import grid_filters +from damask import mechanics from damask import Grid from damask import seeds @@ -36,7 +37,7 @@ class TestGridFilters: _cells,_size,_origin = eval(f'grid_filters.cellsSizeOrigin_coordinates0_{mode}(coord0.reshape(-1,3,order="F"))') assert np.allclose(cells,_cells) and np.allclose(size,_size) and np.allclose(origin,_origin) - def test_displacement_fluct_equivalence(self): + def test_displacement_fluct_periodic(self): """Ensure that fluctuations are periodic.""" # noqa size = np.random.random(3) cells = np.random.randint(8,32,(3)) @@ -133,6 +134,19 @@ class TestGridFilters: assert np.allclose(u,grid_filters.displacement_fluct_point(size,F)) + def test_coordinates(self): + cells = np.array([np.random.randint(40,100)*2,2,2]) + size = (np.random.rand(3)+0.8)*cells + F = np.broadcast_to(np.eye(3),tuple(cells)+(3,3)).copy() + F[...,0,0] += np.expand_dims(0.1*np.sin(np.linspace(0,2*np.pi,cells[0],False))+ + np.random.rand(cells[0])*0.05,(-1,-2)) + + c_n = grid_filters.coordinates_node(size,F)[:,0,0,0] + l_0 = (size/cells)[0] + l = c_n[1:] - c_n[:-1] + epsilon_reconstructed = (l-l_0)/l_0 + epsilon_direct = mechanics.strain(F,'V',1)[:,0,0,0,0] + assert np.corrcoef(epsilon_reconstructed,epsilon_direct)[0,1] > 0.99 @pytest.mark.parametrize('function',[grid_filters.cellsSizeOrigin_coordinates0_point, grid_filters.cellsSizeOrigin_coordinates0_node])