Author(s)

J.E. Souza de Cursi

Abstract

Unilateral contact with dry friction between a net and an obstacle J.E. Souza de Cursi Service de Mathematiques, Ecole Centrale de ABSTRACT We consider a model for the contact between a homogeneous network of strings and an obstacle . The contact is unilateral with friction . The strings are submitted to gravity - like forces and have a stress - unilateral behaviour : all the internal efforts are traction efforts . In the general case of dry friction , there are situations where infinite solutions do exist . For the situation where friction follows the Coulomb's law , the uniqueness of the tensions and a numerical method are established ( Finite Element Approximation of the solution ) . 1. THE STRESS-UNILATERAL PROPERTY OF STRINGS A string is a stress - unilateral structure , i.e. , a structure which is not capable of transmitting compression , i.e. , negative stress : all its internal efforts are traction efforts . Under compression , a string modifies its geometry

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