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. 2015 Oct 6;12(111):20150639. doi: 10.1098/rsif.2015.0639

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© 2015 The Author(s)

Published by the Royal Society. All rights reserved.

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Figure 3. — The geometry and kinematics of the unit cell. (a) Definition of the various geometric variables; and are dihedral angles defined between the facets and x–y reference plane. (b) The smaller Miura sheet I can bulge out or nest in the bigger sheet II. (c) The values of different dihedral angles defined in this unit cell with respect to . Between configurations (i) and (ii) in (c), the folding angles of sheet I have the same magnitude but opposite sign; but the folding angles are the same for sheet II. (Online version in colour.)

Inline graphic — The geometry and kinematics of the unit cell. (a) Definition of the various geometric variables; and are dihedral angles defined between the facets and x–y reference plane. (b) The smaller Miura sheet I can bulge out or nest in the bigger sheet II. (c) The values of different dihedral angles defined in this unit cell with respect to . Between configurations (i) and (ii) in (c), the folding angles of sheet I have the same magnitude but opposite sign; but the folding angles are the same for sheet II. (Online version in colour.)