Stress and strain analysis of layered beams under hygrothermal and mechanical loads

Abstract

In the paper an engineering method for the calcu-lation of stress and strain of layered beams under hy-grothermal and mechanical loads is proposed. The analysis of bilayer beam stresses and strain states is also given. The proposed relationship is based on classical layered beam theory. According to the obtained relationship the analysis of dependences of stress and strain state of bilayerd beam upon the difference of layers‘ hygrothermal strain is per-formed. Variations of layers elasticity modulus and their depth ratio as well as the distribution of hygrothermal strains through layer depth are also considered in analysis. It has been determined that maximal stresses occur at the layers joint. Restraining of hygrothermal deformations for the beam may significantly increase layer stresses.