The article is devoted to the modeling of plant material and to increase the strength properties of building structures using bionic principles. The different kinds of structures reinforcing fabric leafy plants. Recommendations on the use of reinforcement cages during restoration work in construction.

Keywords: shell strength, plant, reinforcing fabric, building construction

The resolving equations for the calculation of the stability of polymer compressed rods with the creep using Galerkin method are obtained. The problem is solved in the case of a simply supported pivotally-rod having an initial bending in the plane of the lower stiffness, and in the case of off-center application of force. Galerkin method used in combination with the finite element method, that is the shape functions are taken as the basis functions . The solution is made numerically, using the software package Matlab. There are two variants considered: a variant of the rod with constant and variable in length stiffness. It is shown that for rods with variable cross-sections and the same mass, a critical time has increased by almost 4.5 times. The solution for the rods of constant cross section agrees well with the solutions obtained by the method of finite differences. This may indicate the reliability of the proposed method  

Keywords: polymer rod, creep, Galerkin method, stability, variable stiffness

This article related to the technological problem. Books and manuscripts are subjected to natural aging due to the fragility of the raw materials, the deterioration of the conditions of storage, as well as losses of fragments due to repeated or careless operation. Therefore, for libraries, archives and museums is particularly important in matters of preservation of documents not only the process of conservation, but the recovery of the lost fragments.

Keywords: technology, restoration, conservation, listodolivochnye machines, vacuum table, the machine for making pulp

  The article shows that the viscoelastic behavior of polymers is well described by a nonlinear generalized Maxwell equation, generalized Russian scientists GI Gurevich In this paper, based on the results of experimental studies of the isothermal relaxation of thermal stresses presented a method to determine the relaxation parameters of the equation. The experiment was carried out on thin-walled tubes, with rigidly clamped ends. Heating or cooling from initial temperature to a final temperature (the temperature relaxation time) was carried out at a constant rate of heating (cooling) in a linear fashion. This work shows that the linearized theory does not give correct results.

Keywords: Thermal stresses, the Maxwell equations relating the parameters, isothermal relaxation

Solving the problem is a strong dependence of physical and mechanical properties of the polymer and the relaxation of the temperature. Significantly affect the time within which the rod is able to maintain a stable position.
For example, the rod loaded with only 57% of the Euler force, loses stability at a temperature of 40°C is about 15 times faster than at 20°C. Thus, to fully exploit the potential of polymeric material to protect it from the effects of temperature.

Keywords: thermal loading, stability, algorithm, approximation

  Given technological regime layering film coating on the paper.A significant change in the properties of the composite material at deviations in the mode of layers of film. The data testifies to the fact that a change in the regime of film layers, causing a deep penetration of the polymer in the paper and a violation can nolitnosti-coating reduces the strength of the resulting complex.

Keywords: film stratification on paper, durability on a break, composition paper basis, temperature, time

  Based on equilibrium equations of a shell element for the membrane theory and continuity equations of its middle surface to derive relationships between the components of the surface load in the shells of revolution. These relations are convenient to go to special cases of shells of revolution in their original ax symmetric subcritical state.

Keywords: rotation cover, bezmomentny condition, components of superficial loading

Information about authors of issue №4 p.2 (2012)

Keywords: authors

The article describes the three main causes of marriage exactly litena production. Suggests ways to address them. 
Keywords: Marriage in precision casting, a type of marriage, the reasons for marriage.

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Information about authors of issue №3 (2012)

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In this paper, we describe fully all the stages of plastic forms. The advantages of using "Pentelast-710." Due to its ease of use, environmental, security, diversity of products offered, two-component silicone rubber is a promising structural material. 
Keywords: "Pentelast-710" Viksint U-18, platemaking technology.

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The article revealed that the invention is a polymer material of construction is due to address a specific design problem. It is shown that plastics have become almost a basic material in design. Denotes the environmental problem that arose in connection with the widespread use of polymers. One of possible solutions to this problem by means of design.

Keywords: design, polymers, plastics processing and recycling, ecology.

Information about authors of issue №2 (2012)

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Information about authors of issue №1 (2012)

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