Gradient field theory of material instabilities

• Autorzy: Valanis K.
• Języki publikacji: EN

Abstrakty

EN

Previously, we developed a gradient thermodynamic theory of internal fields (migratory motions). The theory predicts the observed periodic deformation structures, in material domains under uniform tractions. More recently we showed, in a uniform stress field, that the theory has the proper mathematical framework for the prediction of Portevin-Le Chatelier (PLC for short) instabilities. Here we review our previous work and address the more difficult problem of a non-uniform stress field. Specifically, we predict the points of instability of a solid cylinder under torsion, with the experiments of Dillon as backdrop. Again, we find close agreement between theory and experiment.

Słowa kluczowe

EN

material instabilities; Portevin-Le Chatelier effect; stress; tension; torsion

PL

naprężanie; rozciąganie; skręcanie

• Wydawca: Instytut Podstawowych Problemów Techniki PAN
• Czasopismo: Archives of Mechanics
• Rocznik: 2000
• Tom: Vol. 52, nr 4-5
• Strony: 817--838
• Opis fizyczny: Bibliogr. 12 poz.,

Twórcy

autor

Valanis K.