Self-sharpening of cutting elements of cultivating and earth-moving machines in conditions of reinforcing their working surfaces

Розглянуто динаміку зміни напруженого стану і стану зношення різальних елементів робочих органів ґрунтообробних і землерийних машин за різних варіантів зміцнення. Виявлено вплив варіантів зміцнення на проявлення ефекту самозагострювання різальних елементів. The dynamics of stress state variation and wear for cutting elements of cultivating and earth-moving machine work tools has been considered in various reinforcement conditions. The effect of reinforcement conditions on self-sharpening of cutting elements has been ascertained

A search for disordered (glassy) phase in solid 3He deformed in situ

A disordered (glassy) state has been searched in solid 3He deformed in the course of experiment employing precise measurements of pressure. The analysis of the temperature dependence of the crystal pressure measured at a constant volume shows that the main contribution to the pressure is made by the phonon subsystem, the influence of the disordered phase being very weak. Annealing of the deformed crystal does not affect this state. The results obtained differ greatly from the corresponding data for solid 4He measured in the region of supersolid effects where a pressure excessive in comparison to the phonon one was registered. The excess pressure had a quadratic dependence on temperature, which is typical of a disordered system. Absence of the excess pressure in solid 3He is unclear yet, some speculative interpretations are suggested.Comment: 9 pages, 4 figure