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| Знайдено в інших БД: | Журнали та продовжувані видання (1) | Реферативна база даних (3) |
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Пошуковий запит: (<.>A=Maksymovych O$<.>) | |||
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Загальна кількість знайдених документів : 6 Представлено документи з 1 до 6 |
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| 1. | 
Maksymovych O. V. Determination of stress in composite plates with cracks on the basis of the method of integral equations and solutions by Green [Електронний ресурс] / O. V. Maksymovych, A. R. Dzyubyk, Kh. A. Barvinska, L. V. Dzyubyk // Науковий вісник Національного гірничого університету. - 2019. - № 5. - С. 65-73. - Режим доступу: http://nbuv.gov.ua/UJRN/Nvngu_2019_5_13 Purpose. To construct singular integral equations based on solutions of the Green problem and to develop a method for calculating stresses in the vicinity of cracks in anisotropic plates of complex form. Methodology. The investigation was carried out using the theory of elasticity of anisotropic bodies and the method of integral equations. The numerical algorithm for solving the constructed equations was based on Lobatto quadrature formulas. Findings. The method of determination of stresses near cracks in plates of complex form was developed with the help of the apparatus of integral equations. The kernel of the equations were constructed on Green's solutions, which makes it possible to satisfy automatically the boundary conditions on the given contours. Green's solutions were presented and the integral equations were constructed on their basis for the half-plane with a free or rigidly fixed boundary and plates with an elliptical hole, which are weakened by cracks. Also the investigation of stress intensity factors was performed for a system of cracks placed near a straight-line boundary in a half-plane or near an elliptical hole in a plate. Originality. In the article a method for calculating the stress-strain state in anisotropic plates of complex form based on a device of singular integral equations was proposed, the kernels of which are constructed on Green's solutions. Its efficiency is illustrated while considering the plates of various forms with cracks. Practical value. The results of the research presented in this work can be used in calculations of the strength of composite plates of complex form with cracks. The results of the performed calculations give an opportunity to predict the limit equilibrium of composite plates with cracks located close to its straight-line and elliptic boundaries. | ||
| 2. | 
Jaroszewicz J. Determination of Stresses and Ultimate Loads for Composite Plates with Elastic Inclusions [Електронний ресурс] / J. Jaroszewicz, O. Maksymovych, A. Dzyubyk, I. Nazar // Ukrainian journal of mechanical engineering and materials science. - 2017. - Vol. 3, Num. 2. - С. 38-46. - Режим доступу: http://nbuv.gov.ua/UJRN/ujmems_2017_3_2_7 In the article, the algorithm for determination of stresses in anisotropic plates with elastic inclusions of another anisotropic material was developed on the basis of complex singular integral equations. The solving of integral equations has been carried out numerically using the method of mechanical quadratures. The strength analysis (calculation of strength) of composite plates with inclusions has been performed using the Hoffman criterion. | ||
| 3. | 
Maksymovych O. V. Pliability of faults in open stack versions [Електронний ресурс] / O. V. Maksymovych, V. M. Melnyk, K. Ya. Bortnyk, S. V. Lavrenchuk, V. F. Samarchuk // Комп'ютерно-інтегровані технології: освіта, наука, виробництво. - 2015. - № 21. - С. 2-20. - Режим доступу: http://nbuv.gov.ua/UJRN/Kitonv_2015_21_3 | ||
| 4. |
Maksymovych O. V. Audio player with a library of Delphi [Електронний ресурс] / O. V. Maksymovych, K. V. Melnyk, V. M. Melnyk, O. S. Gaday // Комп'ютерно-інтегровані технології: освіта, наука, виробництво. - 2015. - № 21. - С. 21-24. - Режим доступу: http://nbuv.gov.ua/UJRN/Kitonv_2015_21_4 | ||
| 5. | 
Maksymovych O. Forming technical competence in future specialists in automotive industry at technical colleges: international experience [Електронний ресурс] / O. Maksymovych // Порівняльна професійна педагогіка. - 2020. - № 10(4). - С. 92-97. - Режим доступу: http://nbuv.gov.ua/UJRN/ppp_2020_10(4)__13 | ||
| 6. |
Maksymovych O. Determination of stress concentration near the holes under dynamic loadings [Електронний ресурс] / O. Maksymovych, T. Solyar, A. Sudakov, I. Nazar, M. Polishchuk // Naukovyi visnyk Natsionalnoho Hirnychoho Universytetu. - 2021. - № 3. - С. 19-24. - Режим доступу: http://nbuv.gov.ua/UJRN/Nvngu_2021_3_5 Purpose. To develop an approach for determining the stress state of plate structural elements with holes under dynamic loads with controlled accuracy Methodology. The study was carried out on the basis of the Laplace transform and the method of integral equations. Findings. An approach to determining the dynamic stresses at the holes in the plates is proposed, which includes: the Laplace transform in the time coordinate; a numerical method for determining transformants of displacements and stresses based on the method of integral equations; finding originals on the basis of Prudnikov's formula adapted to dynamic problems of elasticity theory. The problem of determining the Laplace images for displacements is reduced to solving singular integral equations. Integral equations were solved numerically based on the approaches developed in the boundary element method. To find displacements and stresses, the Laplace transform inversion formulas proposed by Prudnikov are adapted to dynamic problems. The study on dynamic stresses at holes of various shapes was carried out. Originality. A new approach to the regularization of the Prudnikov formula for inverting the Laplace transform as applied to dynamic problems of the theory of elasticity has been developed. For its implementation: convergence of Fourier series based on pre-set stresses at the initial time is improved; the remainder is taken into account in the conversion formula. Practical value. A method has been developed for calculating the stress concentration at holes of arbitrary shape in lamellar structural elements under dynamic loads. The proposed approach makes it possible to determine stresses with controlled accuracy. The studies performed at circular and polygonal holes with rounded tops can be used in strength calculations for dynamically loaded plates. The influence of Poisson's ratio on the concentration of dynamic stresses is analyzed. | ||
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