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- W4385491036 abstract "Under the long action of high temperatures and relatively small stresses, many metallic alloys and pure metals loose plasticity and undergo brittle fracture. This problem in mechanics of materials is known as the phenomenon of thermal brittleness. In this work to solve this problem, interrelated kinetic equations for creep deformation and damage parameter are formulated. In these equations the mass conservation law is taking into account and the relative changes of material density is considered as a damage parameter. The results of numerous studies on the changes of porosity and density of various metals and alloys due to the formation and development of micropores and microcracks under conditions of high-temperature creep make it possible to consider density as an integral measure of the accumulation of structural microdefects. Analytical and numerical solutions of the considered system of kinetic equations are obtained. It is shown that the character of the curves according to different solutions is identical and agrees with the corresponding experimental results. It was obtained that the numerical solution completely coincides with the case of purely brittle fracture and small deformations. The long-term strength criterion is formulated. Comparison of theoretical creep and long-term strength curves with experimental results for Cr-Mo steel is given. A good agreement between the corresponding theoretical and experimental results is observed." @default.
- W4385491036 created "2023-08-03" @default.
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- W4385491036 date "2023-01-01" @default.
- W4385491036 modified "2023-09-28" @default.
- W4385491036 title "Exact and Approximate Solutions of the Modified System of Interrelated Kinetic Equations for Damage Parameter and Creep Deformation" @default.
- W4385491036 cites W2078523905 @default.
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- W4385491036 doi "https://doi.org/10.1007/978-3-031-37246-9_15" @default.
- W4385491036 hasPublicationYear "2023" @default.
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