INFLUENCE OF TECHNOLOGICAL PARAMETERS ON CHARACTERISTICS OF POLYMER COMPOSITE MATERIALS IN AUTOMATED LAYUP OF PREPREGS (review)

2021 ◽  
pp. 46-55
Author(s):  
P.N. Timoshkov ◽  
◽  
V.A. Goncharov ◽  
M.N. Usacheva ◽  
A.V. Khrulkov ◽  
...  

The main technological factors when using ATL and AFP technologies are material temperature, laying speed, rolling pressure and no deviation from the required laying trajectory. The article discusses the influence of technological factors on some characteristics of polymer composite materials. The optimum laying temperature should provide the required adhesion. The rate of laying should provide heating of the material without its technological properties. The rolling pressure during laying should ensure optimal porosity and thickness of the material.

Author(s):  
Alsaid Mazen ◽  
Ali Salamekh

In the last decades there is increasing the need to apply polymer composite materials in different industries, particularly in shipbuilding. There are developing single structures made from polymer composite materials to be used on board ships. The article focuses on technology of manufacturing slabs from polymer composite materials to carry out mechanical testing in the laboratory special standard units. Mechanical properties of polymer composite materials depend on molding technologies. There has been described a technology of sample manufacturing from polymer composite materials reinforced with glass fiber mat with fiberglass plastics. The technique of testing the specified samples for tensile strength has been considered. The sizes and shapes of the samples as well as the technological parameters of the manufacturing process have been validated, depending on the standard requirements and the technological features of the testing machine. The physical and mechanical properties of the components that make up the composite materials are considered. The sequence of stacking layers for preparation of plates from composite materials is indicated. The dimensions of the plates for cutting out finished samples are determined, depending on the method of production. The way of laying plates from composite materials has been chosen on the base of economic considerations and conditions of accessibility. The obtained results of mechanical properties can be used in solving problems of application of polymer composite materials in shipbuilding, for example, in manufacturing superstructures of some dry cargo vessels.


Author(s):  
Rudolf Gizelter

Development of manufacture of linear diene oligomers belonging to a liquid rubbers class with viscous liquids consistence allowed to create a new class of conglomerate polymer composite materials - rubber concrete (RubCon®). Rubber concrete is the advanced constructional material created for last years. It is polymer concrete with a unique set of physical-mechanical, chemical and technological properties which allow to obtain highly effective building structures and products on its basis.


2020 ◽  
Vol 26 (6) ◽  
pp. 5-22
Author(s):  
A.V. Kondratiev ◽  

We present a concept of optimization of structural and technological parameters of rocket and space technology units from polymer composite materials under heterogeneous loading and a project complex for their rational selection, taking into account the current level of production. The concept includes five interconnected components: design, production technologies, operation, ecology, and safety of industrial life. The analysis of possible criteria-based optimization estimates is carried out on the example of the technological component of the problem. Decompositions of the general task of parameters’ optimization were carried out into a number of types that correspond to the main types of structures of the considered class of technology: load-bearing compartments of launch vehicles and precision structures of spacecraft. An integrated approach to the optimal design of the bearing compartments of the head block of launch vehicles of various structural and power schemes is proposed. A distinctive feature of the approach is the possibility of multifactor optimization of the parameters for units of the class under consideration while providing regulated load-bearing capacity with simultaneous power and heat loading, taking into account technological, operational, economic, and environmental restrictions that correspond to the existing level of their production. A conceptual approach to the synthesis of rational parameters of composite frames of solar panels of various structural and power circuits is proposed, based on the integrated realization of well-known principles implemented by relevant units that are integrated by computer technology into a single optimization complex. An integrated approach has been synthesized to create precision space structures from polymer composite materials, which makes it possible to obtain rational thermo-dimensionally stable composite structures. An algorithm for determining the rational structure of a composite package has been developed and implemented, which provides a compromise combination for the absolute values of the coefficient of linear thermal expansion keeping maximum precision of the product in accordance with the proposed criteria. The results obtained made it possible to provide an increase by more than 20% in the mass efficiency of the composite aggregates of rocket and space technology produced at the leading enterprises of the industry.


2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Aleksandr E. Kolosov ◽  
Aleksandr V. Gondlyakh ◽  
Volodymyr I. Sivetskii ◽  
Elena P. Kolosova ◽  
Volodymyr V. Vanin ◽  
...  

The problems of modeling the structure and design of technical parameters for forming of oriented macrofiber polymer composites are analyzed. The considered approaches are based on the application of geometric modeling of the structure of oriented fibrous fillers and the design of the parameters of technical means for forming oriented macrofiber polymer composite materials. Peculiarities of the application of the phenomenological and structural approaches to the design of structural and technological parameters of technical means and to the calculation of the elements of composite structures based on oriented macrofibrous fillers are considered. The technique for determining the structural characteristics of oriented macrofibrillar fillers based on its adequate geometric model as capillary-porous bodies is given. As the structural characteristics, the porosity, the specific internal surface, and also the effective (hydraulic) capillary radius of oriented macrofibrous fillers are considered. It is noted that the obtained structural models are used, in particular, to the prognosis of the design and technological parameters of the technical means for molding macro-fiber polymer composite materials.


2016 ◽  
Vol 2 (2) ◽  
pp. 37-42 ◽  
Author(s):  
E. N. Kablov ◽  
L. V. Chursova ◽  
A. N. Babin ◽  
R. R. Mukhametov ◽  
N. N. Panina

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