APPLICATION OF THE FRACTAL APPROACH TO DETERMINATION OF THE POISSON COEFFICIENT OF POLYMERIC SYSTEMSV. A. Sidletskiia and B. B. Kolupaevb UDC 541.64:539.3 Within the framework of the combination of the classical elasticity theory with the concepts of the scale invariance of the polymer structure, the dependence of the Poisson coefficient on the dimension of the fractal cluster has been found. It has been shown that the Poisson coefficient of polymers is related to the value of relative deformation. The range of permissible values of the fractal dimension of materials for the cases of uniaxial tension and compression has been determined. aRovno State Humanities University, Rovno, Ukraine; bT. G. Shevchenko Kiev National University, Kiev, Ukraine. Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 76, No. 4, pp. 164-167, July-August, 2003. Original article submitted October 29, 2002.