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Transformations and equation reductions in finite elasticity. II: Plane stress and axially symmetric deformations. (English) Zbl 1001.74519

Summary: In Part I [Math. Mech. Solids 1, No. 2, 155-175 (1996; Zbl 1001.74517)], the problem of determining plane deformations of a particular perfectly elastic material was shown to give rise to three second-order problems. It is evidently considerably easier to deduce exact finite elastic deformations for these problems than for the full fourth-order problem. All three second-order problems can be reduced to a single Monge-Ampère equation, which can be linearized. Two of the linearizations involve the physical angle \(\Theta\) arising in cylindrical polar coordinates \((R,\Theta)\) and are therefore potentially useful for practical problems. Here, we obtain corresponding results for the two distinct areas of the plane stress theory of thin sheets and axially symmetric deformations. For the first area we deduce two-second order problems, one of which admits a linearization involving two parameters, which turn out to be the polar angle \(\Theta\) and the principal stretch \(\lambda(R,\Theta)\) in the transverse direction. This is an important result because it is very unusual to linearize a problem in terms of two parameters which are both physically meaningful. For axially symmetric deformations we again deduce a second-order problem, but one for which we are unable to provide a linearization. However, we examine a number of simple solutions of the second-order problem.

MSC:

74B20 Nonlinear elasticity

Citations:

Zbl 1001.74517
Full Text: DOI

References:

[1] Hill, J. M., Mathematics and Mechanics of Solids 1 pp 155– (1996) · Zbl 1001.74517 · doi:10.1177/108128659600100201
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