Influence ff the initial state on the strength of pressed lithium hydride

Abstract

We present the results of mechanical testing of pressed lithium hydride under the conditions of uniaxial compression, radial compression, and bending. The specimens were made of three different powder fractions. Their density varied depending on the level of compacting pressure. It is shown that, in the investigated range of parameters characterizing the initial state of the material, the dependences of strength on the characteristic size of the original powder d and the density of the material of the specimen ρ can be described by the same formula of the form σ _f =σ₀-klog(d/d ₀)+l(ρ-ρ₀), where d₀ and ρ₀ are arbitrarily chosen reference points, and σ₀, k, and l are coefficients determined by the method of regression analysis. The use of data on the strength of pressed lithium hydride under the conditions of uniaxial and radial tension processed as indicated above enabled us to obtain a similar dependence for the conditions of uniaxial tension.