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At the line of triple contact of an elastic body with two immiscible fluids,the body is subjected to a force concentrated on this line, the fluid-fluidsurface tension. In the simple case of a semi-infinite body, limited by aplane, a straight contact line on this plane, and a fluid-fluid surface tensionnormal to the plane, the classical elastic solution leads to an infinitedisplacement at the contact line and an infinite elastic energy. By taking intoaccount the body-fluid surface tension (i.e., isotropic surface stress), wepresent a new and more realistic solution concerning the semi-infinite body,which gives a finite displacement and a ridge at the contact line, and a finiteelastic energy. This solution also shows that Green's formulae, in the volumeand on the surfaces, are valid (these formulae play a central role in thetheory).

Finite-displacement elastic solution due to a triple contact line