A numerical approach to the study of finite, quasi-static, plane deformations of viscous solids is introduced. The problem is formulated in terms of a series of incremental problems. A modified version of the finite element method is employed in the solution of this series of problems. It is hoped that this approach may prove convenient for the study of certain problems associated with geological structures. The example of the finite compression of a body with an initially imperfect free surface might shed some light on the formation of mullions.
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Dieterich et al. (1969) studied this question.
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