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. Author manuscript; available in PMC: 2010 Jan 12.

Published in final edited form as: J Biomech Eng. 2007 Apr;129(2):240–249. doi: 10.1115/1.2486179

The three planes of symmetry of the elliptical cone of normal strain (with unit normals {m₁, m₂, m₃}) in relation to the three planes of symmetry of an orthotropic fiber angular distribution (with unit normals {a₁, a₂, a₃}): (a) Example when all three planes coincide. (b) Example of only one coincident plane (normal to a₃ and m₃). (d) Example of no coincident planes.

The three planes of symmetry of the elliptical cone of normal strain (with unit normals {m₁, m₂, m₃}) in relation to the three planes of symmetry of an orthotropic fiber angular distribution (with unit normals {a₁, a₂, a₃}): (a) Example when all three planes coincide. (b) Example of only one coincident plane (normal to a₃ and m₃). (d) Example of no coincident planes.