Abstract Critical velocities of a two-layer composite tube under uniform internal pressure moving at constant velocity are analytically determined. The formulation is based on Love–Kirchhoff thin shell theory that incorporates the rotary inertia and material anisotropy. consists two perfectly bonded axisymmetric circular cylindrical layers dissimilar materials, which can be orthotropic, transve...

The present study deals with modal work that is a type of framework for structural dynamic testing linear structures. Modal analysis powerful tool works on the parameters to ensure safety materials and eliminate failure possibilities. concept classification through this validated isotropic orthotropic materials, reaching up 100% accuracy when deploying machine learning approach between mode num...

In this paper, a new methodology for identifying numerous elastic parameters of an orthotropic material from a single structural test is presented. At the heart of the methodology is the self-learning algorithm which is to extract various stress-strain relationships from a single structural test and train a neural network with the relationships in finite element framework. The constitutive matr...

Demands for increased performance and efficiency of mechanical and electromechanical components impose challenges on their engineering design and optimization, as well as on the types of materials utilized in their construction. Demands on materials imposed by new and rigorous applications have become so diverse and severe that single-component materials used alone cannot meet them. It is frequ...

In this work an alternative approach to the modelling of plates with a large number of holes, is presented. By means of plate theory, it is shown that perforated plates can be modelled by conventional orthotropic plates with modified elastic properties. The modification of the elastic constants is derived by equalising the strain-energy of the perforated and the orthotropic plate. The model obt...

An accurate estimate of thermal stresses in multilayered microelectronics structures along the bonded interfaces is crucial for design and prediction of delamination-related failures. Compared with a numerical method, analytical closed-form solution can offer a more rapid method to obtain the stresses at the interfaces. An analytical model for ply-level sub-laminate analysis is investigated in ...

this paper presents an exact analytical solution for two-dimensional conductive heat transfer in spherical composite pressure vessels .the vessels are in spherical shape and fibers are winded in circumferential direction. the analytical solution is obtained under the general boundary conditions which consist of convection, conduction and radiation inside/outside of vessel. the heat transfer equ...

Abstract We consider the numerical solution of elliptic problems in 3D with boundary nonlinearity, such as arising stationary heat conduction models. allow general non-orthotropic materials where matrix conductivities is a nondiagonal full matrix. The approach involves finite element method (FEM) and Newton type iterations. develop quasi-Newton for this problem, using spectral equivalence to ap...