The Research on Expanded Polystyrene Slabs Bending Strength and Bending Stress

Abstract

The results of expanded polystyrene slabs bending strength and bending stress analysis are presented in this article. The influence neither of short- nor of long-term loads was estimated, therefore, the characteristic of bending strength is not circumstantial. Under the influence of short-term load the material slightly deforms but as soon as the load is eliminated, the deformation vanishes. However, permanent deformations causing collapse of macrostructures elements are also possible. It is proposed to use the characteristics of critical bending stress and critical deflection. These characteristics are estimated in the following way: specimens are periodically strained until certain deformations are achieved; if straining continues after having achieved these deformations, the bending stress diminishes and the specimen collapses.