Designing of ship shafts made of polymer composite materials

2021 ◽  
pp. 38-44
Author(s):  
В.А. Коршунов ◽  
Р.С. Мудрик ◽  
Д.А. Пономарев ◽  
А.А. Родионов
Keyword(s):  
Composite Materials ◽  
Polymer Composite ◽  
Polymer Composite Materials ◽  
Torsional Stiffness ◽  
Design Parameters ◽  
Main Body ◽  
Design Calculation ◽  
The Finite Element Method ◽  
Design Calculations ◽  
Design Options

В работе предложены процедуры для выполнения проектировочного расчета судовых валов из полимерных композиционных материалов. Рассматривалась цилиндрическая оболочка, являющаяся основным телом промежуточного судового вала. Она сформирована из пакетов монослоев, состоящих из армирующего волокна и связующей матрицы. Определяющей нагрузкой на судовой вал принят крутящий момент. Заданы ограничения на параметры напряженно-деформированного состояния, характеризующие формы отказов для оболочки в целом и пакета монослоев. Получены аналитические зависимости, связывающие параметры проектирования с крутильной жесткостью, касательными напряжениями потери устойчивости оболочки и нормальными напряжения в волокне. При заданных характеристиках материала проектирование сведено к определению радиуса и толщины оболочки вала. Выполнена серия проектировочных расчетов, различающихся типом активных ограничений. Полученные варианты проектирования проанализированы с помощью метода конечных элементов. Произведена проверка удовлетворения всех ограничений. Предложены условия проектирования, обеспечивающие приемлемые варианты проектов валов из ПКМ. The paper proposes procedures for performing the design calculation of ship shafts made of polymer composite materials. The cylindrical shell, which is the main body of the intermediate ship shaft, was considered. It is formed from packages of monolayers consisting of a reinforcing fiber and a binding matrix. The determining load on the ship's shaft is assumed to be the torque. Restrictions are set on the parameters of the stress-strain state that characterize the failure forms for the shell as a whole and the monolayer package. Analytical dependences linking the design parameters with torsional stiffness, tangential stresses of the shell loss of stability and normal stresses in the fiber are obtained. With the specified material characteristics, the design is reduced to determining the radius and thickness of the shaft shell. A series of design calculations, differing in the type of active constraints, has been performed. The obtained design options are analyzed using the finite element method. The check of satisfaction of all restrictions is made. The design conditions that provide acceptable variants of shaft designs from PCM are proposed.

Method of parametric optimization in the problems of passenger airliner design

2020 ◽  
Author(s):  
A.A. Bolshikh ◽  
V.P. Eremin
Keyword(s):  
Composite Materials ◽  
Polymer Composite ◽  
Parametric Optimization ◽  
Polymer Composite Materials ◽  
Preliminary Design ◽  
Structural Elements ◽  
The Finite Element Method ◽  
Current Trends ◽  
Box Structure ◽  
Mass Perfection

The paper describes current trends in the design of load-bearing structural elements of modern airliners made using polymer composite materials. In modern passenger airliners, polymer composite materials are used to ensure mass perfection of both lightly loaded elements and critical units, including wing and fin boxes. By means of the finite element method, a box model was created using shell finite elements. Parametric optimization was carried out with account for the anisotropic properties of structural materials. The purpose of the work is to develop a methodology for calculating the structural strength elements of the box and justify the required thicknesses with restrictions on compressive / tensile deformations and loss of stability. The developed methodology makes it possible to obtain a box structure with a minimum mass, while maintaining the necessary stiffness and strength characteristics at the stage of preliminary design.

FEATURES OF THE USEAGE OF SOFTWARE FOR STRUCTURAL ANALYSIS CONSTRUCTION FROM POLYMER COMPOSITE MATERIALS (Review)

2021 ◽  
pp. 10-18
Author(s):  
V. A. Goncharov ◽  
P. N. Timoshkov ◽  
M. N. Usacheva
Keyword(s):  
Finite Element Method ◽  
Mass Transfer ◽  
Finite Element ◽  
Composite Materials ◽  
Structural Analysis ◽  
Polymer Composite ◽  
Static Strength ◽  
Polymer Composite Materials ◽  
The Finite Element Method ◽  
Materials Used

This review considers the popular software for the calculation and technical means of structures made of polymer composite materials, used by specialists from design bureaus and research centers. These programs analyze the dynamics and static strength of heat and mass transfer, solve problems of mechanics, structural analysis and related multidisciplinary problems. The most commonly used levels of destruction of PCM, Hill-Mises, Tsai-Wu, Hoffman correspond. The finite element method is considered as one of the most effective in calculating aircraft structures.

scholarly journals Modeling the behavior of pedestrian railings taking into account their joint work with the span of bridges

2020 ◽  
Vol 7 (2) ◽  
Author(s):  
Vitaliy Koptilov ◽  
Vasiliy Lebedev ◽  
Boris Mandrik – Kotov ◽  
Ilya Ovchinnikov
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Composite Materials ◽  
Polymer Composite ◽  
Static Loading ◽  
Strain State ◽  
Polymer Composite Materials ◽  
The Finite Element Method ◽  
Joint Work ◽  
Bridge Structures

The problem of calculating pedestrian railing made of polymer composite materials on bridge structures is analyzed. It is noted that, although methods for calculating various products and structures made of polymer composite materials have been sufficiently developed, however, methods for calculating pedestrian railing are still just beginning to be developed. Normative methods for calculating pedestrian railing are very primitive and do not take into account all the features of their work. The article discusses the application of the finite element method to the calculation of pedestrian railing, and in addition to standard loads, the effect of the wind load and the joint work of the pedestrian railing with the span are taken into account. It is shown that the joint work of the pedestrian railing with the span, even under static loading, has a significant effect on its stress-strain state, increasing it, which in certain cases, in the presence of installation defects, leads to the destruction of the pedestrian railing from polymer composite materials.

FSUE "VIAM" solvent-free binders for 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
Keyword(s):  
Composite Materials ◽  
Polymer Composite ◽  
Solvent Free ◽  
Polymer Composite Materials

Aging of polymer composite materials under loading. (See Beginning in #10-2020)

2020 ◽  
pp. 2-12
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Polymer Composite ◽  
Polymer Composite Materials ◽  
Cyclic Loads ◽  
Reinforced Plastics ◽  
Water Exposure ◽  
Laboratory Conditions ◽  
Bending Loads ◽  
Moisture Conditions

A study review of aging polymer composite materials (PCM) under different heat-moisture conditions or water exposure with the sequential or parallel influence of static or cyclic loads in laboratory conditions is presented. The influence of tension and bending loads is compared. Conditions of the different load influence on parameters of carbon-reinforced plastics and glass-reinforced plastics are discussed. Equipment and units for climatic tests of PCM under loading are described. Simulation examples of indices of mechanical properties of PCM under the influence of environment and loads are shown.

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