A Unified Method for Predicting the Behaviour of Strength Characteristics of Quasi-Brittle Materials over a Wide Range of Loading Rates

摘要

The need in modern engineering and technical practice for calculating and designing constructions in the adaptation and improvement of existing methods of materials testing has long been a crucial issue. It is necessary to develop methods for testing materials and calculating the strength of structures that consider both current operational high-speed loads and sudden dynamic impacts. This paper discusses the experimental and theoretical basis for determining and predicting the strength characteristics of quasi-brittle materials over a wide range of loading rates. The results of the standard tests for PMMA and a refractory brick under compression, tension (splitting) and bending are presented. As a theoretical basis, the structural-temporal approach is considered. It is shown that the critical stresses in the materials under dynamic loads can be estimated based on no more than three parameters.