A mathematical model has been constructed and verified for the behavior of a composite barrier under the conditions of shock-wave loading. An analytical-experimental method has been used to assess ...the effects of a modified composite barrier in high-velocity interaction with a spherical steel striker in the velocity range of 500–1200 m/s.
Tensile strength of reinforcing bars after bending-unbending Plyaskin, A. S.; Matveev, A. V.; Babarykina, A. I. ...
Vestnik Tomskogo gosudarstvennogo arkhitekturno-stroitelʹnogo universiteta,
06/2024, Letnik:
26, Številka:
3
Journal Article
Recenzirano
The article studies the influence of bending and unbending of reinforcing bars on the mechanical properties of steel bars. This problem is relevant in the practice of constructing monolithic ...reinforced concrete structures, since reinforcing bars are often subjected to initial bending. The question arises about their further use. Based on the results obtained, a comparative analysis of the mechanical properties is presented for reinforcing bars after tensile strength testing with varying the initial bend diameter. According to this testing, it is possible to further use these reinforcing bars after single and reverse bending without reducing the strength properties of the steel.
The article presents the results of numerical studies of the stress-strain state of the models of a vertical cylindrical tank with corrosion wear and with the strengthening of the wall of the first ...ring by an external and internal composite tyre. Based on the results of the studies, the maximum percentage of corrosion wear of the wall of the first ring of the tank have been determined, and the dependences of the influence of the installation of the internal and external carbon composite tyre on the stress-strain state have been obtained.
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Tetrakis(chloromethyl)dimethylsilylethynylsilane and -germane were synthesized by the reaction of BrMgCCSi(CH2Cl)Me2 with SiCl4/GeCl4. Their structures were proved by IR, NMR ...spectroscopy and X-ray analysis, and compared to the results of MP2/6-311G(d,p) calculations.
The article represents the results of the experimental research of the evolution of strain fields of a steel plate with a stress concentrator by the correlation method of digital images. The obtained ...results reflect elaborately the evolution of the distribution of isofields towards the strains on the surface of the steel plate and the behavior of their distributions, which corresponds to each stage of the stress-strain curve under uniaxial tension.
The parameters of humoral and cell-mediated immunity were studied in cancer patients treated with fetal preparations. The study revealed a tendency towards an increase in serum interferon and ...activity of tumor necrosis factor-α (in the patients with pronounced response to therapy), increased count of CD8^sup +^-lymphocytes (in the patients not responding to embryonal proteins) and a tendency towards a decrease in the counts of lymphocytes with signs of apoptosis in the patients in whom the treatment was ineffective.PUBLICATION ABSTRACT
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