On the deformation of beam-like elements from composite materials in uniform compression

Generalization of data on the behavior of beam-like elements from composite materials has revealed lack of information about the influence of various factors on the above elements' deformability. A comparison of a stress-strain state in different models, viz. concrete and reinforced elements, made it possible to substantiate the influence of longitudinal reinforcement (saturation rate, strength and strain properties) on critical strains in the section. Proceeding from the results obtained, we make recommendations on finding the critical value of reinforcement saturation rate (reinforcement ratio) which exceeding provides the reinforcement effect upon deformability of the examined cross-sections. We note a decrease in brittle matrix resistance of a composite with an inhomogeneous structure due to destructive processes and point to the necessity of refining the state-of-the-art calculation procedure for such strength decrease. We consider a problem of determining the limiting reinforcement ratio at which destructive processes in a brittle material go beyond permissible limits.