Výsledky vyhledávání - "B. I. Koval'chuk"

On the existence of thermomechanical surface in materials under nonisothermal repeated simple loading

Publikováno v: Strength of Materials. 38:458-465

The paper discusses the findings of the experimental study of deformation in steels of various grades in tension with interim unloading stages where the test temperature was varied. It is demonstrated that not for all the materials this deformation p

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::13018919e49442f9a5e2493c85e0ac65
https://doi.org/10.1007/s11223-006-0065-y

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Plastic deformation of titanium alloys under simple loading and its mathematical modeling

Autor: A. L. Kravchuk, B. I. Koval’chuk, N. M. Kul'chitskii

Publikováno v: Strength of Materials. 31:448-454

Results of an experimental investigation of the regularities of plastic deformation of titanium alloys in a plane stress state are analyzed. Tests were performed by loading thin-walled tubular specimens by an axial force and internal pressure under c

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::65d91521bb3e57ea7a3cd3703411b3fc
https://doi.org/10.1007/bf02511162

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Derivation of the stress-strain equations for metastable materials with martensite transformations under proportional loading

Autor: L. V. Zaitseva, B. I. Koval’chuk

Publikováno v: Strength of Materials. 31:232-240

The constitutive equations of plasticity theory for metastable materials with austenite-martensite transformations under proportional loading are proposed. The hardening and residual volume-change functions entering in the equations account for the i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4926b1a2e1bf096d7737ce84cb67b91c
https://doi.org/10.1007/bf02511001

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Deformational theory of plasticity of transversely isotropic media

Autor: B. I. Koval’chuk, O. V. Voronina, V. V. Kosarchuk, A. A. Lebedev

Publikováno v: Strength of Materials. 30:1-8

We propose a version of the theory of plasticity of transversely isotropic media for the case of simple loading. Our version is based on the concept of yield surface. We use a quadratic condition of yield that takes into account the partial effects o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9a14fc63cf129e27f43857ba8201d37a
https://doi.org/10.1007/bf02764412

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Effect of thermomechanical conditions on the kinetics of phase transformations in austenitic metastable steel

Autor: B. I. Koval'chuk, A. A. Lebedev, L. V. Zaitseva

Publikováno v: Strength of Materials. 27:124-128

We present the results of an experimental investigation of the γ—a martensitic transformation upon cyclic cooling of structurally unstable steel, taking into account such factors as time, preliminary deformation, and sustained loading of the mater

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8063d6cab98f4bed511746aa57f6f48e
https://doi.org/10.1007/bf02209476

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Experimental verification of the determining equations of the theory of plastic flow of anisotropic media

Autor: V. V. Kosarchuk, S. A. Mel'nikov, B. I. Koval'chuk

Publikováno v: Strength of Materials. 23:1161-1168

The article presents the results of the experimental investigation of the regularities of elastoplastic deformation of initially anisotropic aluminum alloys under simple and complex loading. The experimental data are compared with those calculated by

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::14d91298a5fbf37679d8b9352c80fd40
https://doi.org/10.1007/bf00780091

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Effect of loading prehistory on phase transformations in chromium-nickel steel with plastic deformation

Autor: V. V. Kosarchuk, A. A. Lebedev, L. V. Zaitseva, B. I. Koval'chuk

Publikováno v: Strength of Materials. 23:1101-1105

Results are given for a study of the kinetics of phase transformations in chromium-nickel austenitic steel with repeated plastic deformation including under conditions when prior and repeated loading differ in temperature and form of stressed state.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::33b972ae1bcdbc89f49d5ef9f783a93c
https://doi.org/10.1007/bf00771919

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