 | | Mechanics of Solids
A Journal of Russian Academy of Sciences | | Founded
in January 1966
Issued 6 times a year
Print ISSN 0025-6544
Online ISSN 1934-7936 |
Archive of Issues
| Total articles in the database: | | 13088 |
| In Russian (Èçâ. ÐÀÍ. ÌÒÒ): | | 8125
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| In English (Mech. Solids): | | 4963 |
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| A.P. Yankovskii, "Modeling of Short-Term Creep of Fibrous Materials Taking into Account Plastic Deformation of Composition Components," Mech. Solids. 60 (1), 1-19 (2025) |
| Year |
2025 |
Volume |
60 |
Number |
1 |
Pages |
1-19 |
| DOI |
10.1134/S0025654424604749 |
| Title |
Modeling of Short-Term Creep of Fibrous Materials Taking into Account Plastic Deformation of Composition Components |
| Author(s) |
A.P. Yankovskii (Khristianovich Institute of Theoretical and Applied Mechanics the Siberian Branch of the Russian Academy of Science, Novosibirsk, 630090 Russia, lab4nemir@rambler.ru) |
| Abstract |
A numerical and analytical model of the structural mechanics of multidirectionally reinforced metal-composites operating under short-term creep conditions has been developed. The materials of the components of the metal-composition are homogeneous and isotropic; their thermal sensitivity and thermoelastoplastic deformation are taken into account. Plastic deformation of the phases
of the composition is described by the relations of the theory of flow with isotropic hardening. As damage parameters for the components of a metal-composition, their relative mechanical deformation
accumulated during loading is used – the deformation criterion for failure during short-term creep of
metals. To construct the specified mathematical model, due to its significant physical nonlinearity, an
algorithm of variable time steps was used. Linearization of the governing equations for the components
and the metal-composition as a whole at each time step is carried out using a method similar to the
secant modulus method. Using the example of moment-free cylindrical shells, it is demonstrated that,
due to the essentially physical nonlinearity of the modeled problem, varying the reinforcement structure in metal-composite structures operating under conditions of short-term creep has a significantly
greater impact on their mechanical response than when operating under conditions of thermoelastic
deformation. With an increase in the operating temperature of a metal-composite product, this influence increases sharply. With some, in particular rational, reinforcement structures, the materials of the
metal-composition of the product can be deformed, exhibiting signs inherent in limited creep. With
such reinforcement structures, the structure can operate effectively under conditions of long-term loading, and not only under short-term creep. |
| Keywords |
multidirectional reinforcement, short-term creep, thermoelastoplastic deformation, thermal sensitivity, metal-composition, structural model, time step algorithm |
| Received |
29 January 2024 | Revised |
28 June 2024 | Accepted |
02 July 2024 |
| Link to Fulltext |
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