sigma_xx sigma_yy sigma_zz sigma_xy sigma_yz sigma_xz
  0.0326   0.2220  -0.3349  -0.0696  -0.3854  -0.5119
 -0.0735  -0.1346  -0.0514  -0.1415  -0.4771   0.7371
 -0.0729   0.8048  -0.8672  -0.1350  -0.3264   0.0472
  0.2142   0.7184   1.0727   0.1922  -0.0145   0.5571
 -0.3609  -0.4714  -1.2935   0.2797  -0.5183   0.3430
 -0.1311   0.0541  -0.0342   0.2068  -0.0915  -0.1883
 -0.0175   1.0526   0.8706  -0.0311  -0.2334   0.0516
  0.0400  -0.8878  -0.1523   0.3742  -0.6050  -0.4635
 -0.9433  -0.0015  -0.4881   0.3130  -0.9633  -0.0729
  0.9479  -0.1517   0.2010   0.5526   0.1150  -0.3245
 -0.0804   0.0720  -0.6490   0.0978  -0.0732   0.4207
 -0.6703   0.4296  -0.6983   0.1151  -0.1105  -0.4630
 -0.0245   0.5835   0.3166  -0.1213  -0.3804  -0.0642
  0.1997  -0.7909   0.0001  -0.2092   0.0635   0.0088
 -0.7827   0.1909  -0.1338   0.0863  -0.5513  -0.4858
 -0.3064  -0.4735   0.4072   0.1784   0.1440  -0.3570
 -0.7782   0.1125  -1.0469  -0.2477  -0.4527  -0.0765