Перегляд Відділення механіки за назвою

Результати 41-60 з 5883

Analysis of fracture mechanisms and surface quality in drilling of composite materials

Sedlacek, J.; Humar, A. (Проблемы прочности, 2008)

The aim of this work is to clarify the interaction mechanisms between the drilling tool and material. Drilling tests were carried out on glass/polyester and carbon/epoxy composites using different twist drills. The cutting ...
Analysis of Gas Nitriding Characteristics under Different Cold Hardening and Nitriding Pressure Conditions for Low-Carbon Low-Alloy Steel

Zhou, Z A.; Fu, W.T.; Zhang, R.H.; Qi, J.J.; Jin, G.F.; Wang, Z.H.; Sun, S.H. (Проблемы прочности, 2018)

A new approach to quick preparation of a nitrided case for low-carbon low-alloy steels was proposed. It is based on cold hardening and pressurized gas nitriding. The microstructure, surface hardness, thickness, and corrosion ...
Analysis of Longitudinal Cracks in Multilayered Beams with Account of the Material Nonlinearity

Rizov, V.I. (Проблемы прочности, 2017)

The present paper reports a theoretical study of longitudinal fracture in multilayered beams with taking into account the material non-linearity. The study was performed in terms of the strain energy release rate by using ...
Analysis of Residual Stresses during Heat Treatment of Large Forged Shafts Considering Transformation Plasticity and Creep Deformation

Yanagisawa, Y.; Kishi, Y.; Sasaki, K. (Проблемы прочности, 2017)

Длительное охлаждение при термообработке больших поковок из-за массового эффекта приводит к возникновению деформации ползучести не только за счет высокой температуры, но и вследствие ее изменения. Изменение пластичности и ...
Analysis of technologies for spacecraft removal from low earth orbits using onboard-produced electromagnetic and magnetic fields

Lapkhanov, E.; Paliy A. (Технічна механіка, 2018)

The aim of this paper is to analyze the effectiveness of propulsion devices with permanent magnets as an alternative space debris deorbit system for low earth orbits.
Analysis of the Contact Stresses in Curvic Couplings of Gas Turbine in a Blade-Off Event

Jiang, X.-J.; Zhang, Y.-Y.; Yuan, S.-X. (Проблемы прочности, 2012)

The contact pressure distribution of the curvic couplings in a heavy duty gas turbine under a blade-off load condition is investigated in a three-dimensional finite element model. Several blade-off positions on each stage ...
Analysis of the possibility of accounting for the antenna reflection coefficient in displacement measurements by probe methods

Pylypenko, O.V.; Doronin, A.V.; Gorev, N.B.; Kodzhespirova, I.F. (Технічна механіка, 2019)

Цель данной работы заключается в выборе зондового метода измерения перемещения, который может быть модифицирован с тем, чтобы учесть коэффициент отражения рупорной антенны, пренебрежение которым может оказаться недопустимым ...
Analysis of the sensitivity of a vibration-based procedure for structural identification

Auzins, J.P.; Boyko, A.F. (Проблемы прочности, 2006)

We analyze the accuracy of estimation of structural component material properties (elastic modulus, Poisson’s ratio, density, etc.) using the technique for measuring the eigen frequencies of oscillations. The accuracy ...
Analysis of thin isotropic rectangular and circular plates with multiquadrics

Ferreira, A.J.M.; Roque, C.M.C.; Martins, P.A.L.S. (Проблемы прочности, 2005)

A computational method based on radial basis functions has been applied to the linear solution of thin plates. This meshless numerical methodgives high flexibility in the analysis of irregular geometries, due to its ...
Analysis of Vibration Natural Frequencies of Rotationally Restrained and Simply Supported Circular Plate with Weakened Interior Circle Due to an Angular Crack

Bhaskara Rao, L.; Kameswara Rao, C. (Проблемы прочности, 2015)

Получено точное решение для описания колебаний шарнирно закрепленной по внешнему краю круговой пластины с ограничением по вращению, которая ослаблена круговой трещиной. Рассчитаны частоты шести первых мод колебаний пластины ...
Analysis of Viscoelastoplastic Behavior of Expanded Polystyrene under Compressive Loading: Experiments and Modeling

Imad, A.; Ouâkka, A.; Dang Van, K.; Mesmacque, G. (Проблемы прочности, 2001)

The use of expanded polystyrene (EPS) in road paving, where the soil exhibits special properties (for example, compressive soil), calls for the necessity of investigating the mechanical behavior of this material. In ...
Analysis of Warm Prestressing Effect on Fracture Toughness of Reactor Pressure Vessel Steels

Beleznai, R.; Szávai, Sz. (Проблемы прочности, 2010)

Выполнен конечноэлементный расчет напряженно-деформированного состояния образцов типа Шарпи с трещиной при испытаниях на трехточечный изгиб с учетом влияния предварительной горячей опрессовки на вязкость разрушения ...
Analytical Analysis of the Interfacial Stress in Damaged Reinforced Concrete Beams Strengthened by Bonded Composite Plates

Hassaine Daouadji, T. (Проблемы прочности, 2013)

A theoretical method to predict the interfacial stresses in the adhesive layer of damaged reinforced concrete beams strengthened with externally bonded carbon fiber-reinforced polymer plate is presented. The adopted model ...
Analytical evaluation of local effects in cylindrical shells testing and design

Guarracino, F. (Проблемы прочности, 2009)

A simple analytical evaluation of apparently anomalous results from tests on circular cylindrical shells that have been observed in the past is provided on the basis of the classical Ritz approach and modified Donnell ...
An Asymptotic Linear Thin-Walled Rod Model Coupling Twist and Bending

Hamdouni, A.; Millet, O. (Прикладная механика, 2010)

A linear one-dimensional model for thin-walled rods with open strongly curved cross-section, obtained by asymptotic methods is presented. A dimensional analysis of the linear three-dimensional equilibrium equations lets ...
An equivalent uniaxial fatigue stress model for analyzing landing gear fuse pins

Narayan, K.; Behdinan, K.; Vanderpol, P. (Проблемы прочности, 2006)

We study the biaxial stress state conditions in landing gear fuse pins in the fuse groove. This biaxial state comprises a combination of shear stresses which are usually the largest stresses in the fuse pin by ...
A New Method for Evaluation of Mechanical Properties of Glass/Epoxy Composites at Low Temperatures

Shokrieh, M.M.; Torabizadeh, M.A.; Fereidoon, A. (Проблемы прочности, 2012)

Для расчета прочности однонаправленного композита при различных видах нагружения в условиях комнатной температуры и -60°C использованы аналитические модели, учитывающие микромеханические характеристики композитов. В отличие ...
An Experimental Study of the Dynamic Split Tension Properties of Reinforced Concrete

Zhao, Z.; Jing, L.; Pei, Q.; Ma, H.W.; Wang, Z.H. (Проблемы прочности, 2016)

Dynamic split tensile tests of reinforced concrete were carried out using the split Hopkinson pressure bar experimental technique to determine the failure modes of reinforced concrete at different strain rates, and the ...
An Improved Projection Method for Determination of Fatigue Parameters of Metal Structures Based on Spherical Direction Cosine Group Construction

Yang, B.; Ma, B.Q.; Wu, Y.Y.; Chen, B.; Xiao, S.N.; Yang, G.W.; Zhu, T. (Проблемы прочности, 2016)

The key components of railway rolling stock are almost constantly in the multiaxial stress state in service. To evaluate the fatigue strength of the structure, stress parameters should be obtained beforehand. The traditional ...
An iterative approach for obtaining nonlinear frequency of a conservative oscillator with strong nonlinearities

Mohammadian, M.; Pourmehran, O.; Ju, P. (Прикладная механика, 2018)

An iterative procedure is suggested for obtaining the higher-order approximate solutions of a conservative system comprising an oscillator with cubic and quintic restoring force function. The proposed method is similar to ...

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