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Parallel, Similar and Constrained Folds by Arvid M. Johnson; Virginia J. Pfaff is a Engineering article available to read on EtoBox.

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Theoretical analysis of folding of viscous multilayers with free slip or bonding at layer contacts indicates that folds in such multilayers can be described in terms of three end-members: parallel, in which orthogonal thicknesses of layers are largely constant; similar, in which vertical thicknesses of layers and shapes of successive interfaces are essentially constant; and constrained, in which amplitudes of anticlines and synclines decrease to zero at upper and lower boundaries. Constrained, internal folds form if the multilayer is confined by rigid media; parallel, concentric-like folds form if the multilayer is confined by soft media, provided soft interbeds are sufficiently thin for the stiff layers to fold as an ensemble. Similar, sinusoidal or chevron folds form throughout much of the thickness of a multilayer, for any stiffness of confining media, provided wavelengths of folds are short relative to the thickness of the multilayer or soft interbeds are sufficiently soft and thick for the stiff layers to act independently. The analysis shows that multilayer folds may have the same form regardless of whether the layer contacts are freely slipping or bonded. The forms of folds

Who reads Parallel, Similar and Constrained Folds?

Author

Arvid M. Johnson; Virginia J. Pfaff

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0013-7952)

Published

1989

Language

EN

Field

Engineering (Physical Sciences)