• فهرست مقالات Analytical approach

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        1 - Delamination of Two-Dimensional Functionally Graded Multilayered Non-Linear Elastic Beam - an Analytical Approach
        V Rizov
        Delamination fracture of a two-dimensional functionally graded multilayered four-point bending beam that exhibits non-linear behaviour of the material is analyzed. The fracture is studied analytically in terms of the strain energy release rate. The beam under considerat چکیده کامل
        Delamination fracture of a two-dimensional functionally graded multilayered four-point bending beam that exhibits non-linear behaviour of the material is analyzed. The fracture is studied analytically in terms of the strain energy release rate. The beam under consideration has an arbitrary number of layers. Each layer has individual thickness and material properties. A delamination crack is located arbitrary between layers. The material is two-dimensional functionally graded in the cross-section of each layer. The beam mechanical behaviour is described by a power-law stress-strain relation. The fracture is analyzed also by applying the J-integral approach in order to verify the solution derived for the strain energy release rate. The effects of crack location, material gradient and non-linear behaviour of material on the delamination fracture are evaluated. It is found that the material non-linearity leads to increase of the strain energy release rate. Therefore, the material non-linearity should be taken into account in fracture mechanics based safety design of two-dimensional functionally graded multilayered structural members. It is found also that the delamination behaviour can be effectively regulated by using appropriate material gradients in the design stage of functionally graded multilayered structural members and components. پرونده مقاله
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        2 - On Increasing of Integration Rate of Elements of a Current Source Circuit
        Evgeny L. Pankratov
        In this paper we introduce an approach to increase integration rate of elements of a current source circuit. Framework the approach we consider a hetero-structure with special configuration. Several specific areas of the heterostructure should be doped by diffusion or i چکیده کامل
        In this paper we introduce an approach to increase integration rate of elements of a current source circuit. Framework the approach we consider a hetero-structure with special configuration. Several specific areas of the heterostructure should be doped by diffusion or ion implantation. Annealing of dopant and/or radiation defects should be optimized. پرونده مقاله
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        3 - On Analytical Approach to Estimate Proceeds of Industrial Enterprises
        Evgeny L. Pankratov
        In this paper we presents a model to prognosis of proceeds of industrial enterprises. The model gives a possibility to analyze proceeds of enterprises with account of changing of quantity of manufactured products. The model gives a possibility to analyze proceeds of ent چکیده کامل
        In this paper we presents a model to prognosis of proceeds of industrial enterprises. The model gives a possibility to analyze proceeds of enterprises with account of changing of quantity of manufactured products. The model gives a possibility to analyze proceeds of enterprises with account of changing of quantity of manufactured products. At the same time the model gives a possibility to take into account various expenses (raw materials, transportation costs, ...). An analytical approach for analysis of the influence of various parameters on the considered proceeds has been introduced. پرونده مقاله