| 摘要 |
FIELD: test equipment.SUBSTANCE: invention relates to test equipment, namely to engineering surveys, and can be used to determine a strain-and-stress state of rocks, and namely to determine a stage of development of deformation processes in mass of material (in rock mass, soils under an engineering facility, etc.). Essence of the invention: specimens of material with a brittle skeletal frame are taken. Loading of specimens is performed and physical and mechanical characteristics of material are recorded, and a stress-deformation curve is built up, as per which parameters characterising a precursor of material destruction are determined. At compression of specimens, coefficients?, ?are determined, which characterise variation in potential energy of elastic deformation at scattered destruction of material, and the precursor of material destruction is found out by the formula:where ?- a positive parameter setting a quadratic dependence of surface energy of an accumulated set of microcracks in brittle material, I- relative variation in material volume, J - intensity of tangential deformations, and ?p - variation in intra-threshold pressure.EFFECT: possibility of characterising a stage of material state prior to destruction, which is a precursor of material destruction, by reducing the time of measurement due to reduction of the number of test specimens.3 cl, 3 dwg |
