MORE ABOUT THE RELATIONS BETWEEN THE ERICKSEN-LESLIE-PARODI AND ERINGEN-LEE THEORIES OF NEMATIC LIQUID-CRYSTALS

This paper is a further consideration of the relation between two main phenomenological theories of nematic liquid crystals: Ericksen-Leslie-Parodi (ELP) and Eringen-Lee (EL). The aim of the study is to establish the generality of the conclusion which claims that the ELP theory is a particular case of the EL theory. According to the analysis presented in the paper this conclusion may be treated as true but only after modification of the constitutive equation for Emij in the EL theory by one term arising from splay deformation. The results of the study are formulated in four conclusions given at the end of the paper. © 1990.