Three shear eigenstrains –> orthotropic
{"Image DocumentName": "Three shear eigenstrains \u2013> orthotropic", "Image ImageDescription": "Three shear eigenstrains generate three planes of symmetry, thus the tensor has orthotropic symmetry. This orthonormal eigensystem leads to this Voigt stiffness matrix with nine independent stiffnesses. Orthotropy marks an important point: up to now we had just to add new planes to increase the symmetry. Also, the shape of the matrix has reached its final form. From now on, co-planar shear tensors and identical eigenstiffnesses will be needed to increase symmetry. The Structure of Tensors.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}