Abstract
In this paper, beam models accounting for non-linear elastic bimodular constitutive behavior and frictionless unilateral contact conditions are rationally deduced from three-dimensional elasticity by means of a variational constrained approach. Consistent internal constraints on both stress and strain dual fields are enforced through a modified Hu-Washizu functional, obtained by a non-standard application of Lagrange multipliers and constrained in the convex set of the admissible contact displacements. A bimodular strain energy density is adopted and for both no-shear and first-order shear deformable beam models a generalized variational formulation of Signorini’s problem is recovered. Finally, several simple study cases are investigated, highlighting the influence of the bimodular constitutive law.
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Maceri, F., Vairo, G. (2013). Beams Comprising Unilateral Material in Frictionless Contact: A Variational Approach with Constraints in Dual Spaces. In: Stavroulakis, G. (eds) Recent Advances in Contact Mechanics. Lecture Notes in Applied and Computational Mechanics, vol 56. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-33968-4_17
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DOI: https://doi.org/10.1007/978-3-642-33968-4_17
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