Stress-strain state of shells of revolution from composite materials with interphasal transformations and nonlinearity of the deformation taken into account

1990 ◽  
Vol 26 (4) ◽  
pp. 369-373
Author(s):  
A. V. Lesechko
Keyword(s):  
Composite Materials ◽  
Strain State ◽  
Shells Of Revolution ◽  
Stress Strain ◽  
Stress Strain State

Stress-Strain State Exploration of Stringer Made of Composite Materials Depending on Layers Stacking Structure

2018 ◽  
Vol 284 ◽  
pp. 71-76
Author(s):  
P.V. Solovyev ◽  
A.I. Gomzin ◽  
L.A. Ishbulatov ◽  
S.N. Galyshev ◽  
F.F. Musin
Keyword(s):  
Composite Materials ◽  
Cross Section ◽  
Strain State ◽  
Stress Strain ◽  
Stress Strain State ◽  
Airplane Wing ◽  
External Loads ◽  
Stacking Structure ◽  
Composite Carbon ◽  
Shaped Cross Section

In this article the results of stress-strain state investigation for composite airplane wing stringer with different layers stacking structures are presented. As an object of research, a stringer made of composite carbon with V-shaped cross-section is considered. Due to the stress-strain state analysis of various stringer structures, the most effective structure for stringer layers stacking is selected, both in the view of providing the most rigidity and optimal perception by the stringer the field of external loads, which are most typical for the conditions of its operation.

Study of the stress-strain state of three-layer conical shells with skins made of high-modulus composite materials

1986 ◽  
Vol 21 (4) ◽  
pp. 454-459
Author(s):  
V. U. Kotel'nikov ◽  
V. A. Morozov ◽  
S. V. Mokryi ◽  
G. I. Yurin
Keyword(s):  
Composite Materials ◽  
Strain State ◽  
High Modulus ◽  
Stress Strain ◽  
Conical Shells ◽  
Stress Strain State

Stress-strain state of three-layer thick-walled shells of revolution with nonideal contact between the layers

1990 ◽  
Vol 26 (4) ◽  
pp. 332-336
Author(s):  
Yu. N. Nemish ◽  
I. S. Sagalyuk ◽  
D. I. Chernopiskii
Keyword(s):  
Strain State ◽  
Shells Of Revolution ◽  
Stress Strain ◽  
Stress Strain State ◽  
Nonideal Contact

scholarly journals Stress-strain state of shell of revolution analysis by using various formulations of three-dimensional finite elements

2020 ◽  
Vol 16 (5) ◽  
pp. 361-379
Author(s):  
Natalia A. Gureeva ◽  
Yuriy V. Klochkov ◽  
Anatoly P. Nikolaev ◽  
Vladislav N. Yushkin
Keyword(s):  
Finite Element ◽  
Strain State ◽  
Hermite Polynomials ◽  
Mixed Formulation ◽  
Shell Of Revolution ◽  
Shells Of Revolution ◽  
Displacement Method ◽  
Stress Strain ◽  
Stress Strain State ◽  
Internal Forces

The aim of the work is to perform a comparative analysis of the results of analyzing arbitrarily loaded shells of revolution using finite element method in various formulations, namely, in the formulation of the displacement method and in the mixed formulation. Methods. To obtain the stiffness matrix of a finite element a functional based on the equality of the actual work of external and internal forces was applied. To obtain the deformation matrix in the mixed formulation the functional obtained from the previous one by replacing the actual work of internal forces in it with the difference of the total and additional work was used. Results. In the formulation of the displacement method for an eight-node hexahedral solid finite element, displacements and their first derivatives are taken as the nodal unknowns. Approximation of the displacements of the inner point of the finite element was carried out through the nodal unknowns on the basis of the Hermite polynomials of the third degree. For a finite element in the mixed formulation, displacements and stresses were taken as nodal unknowns. Approximation of the target finite element values through their nodal values in the mixed formulation was carried out on the basis of trilinear functions. It is shown on a test example that a finite element in the mixed formulation improves the accuracy of the strength parameters of the shell of revolution stress-strain state.

Block finite-element model of layer-by-layer analysis of three-layer stress–strain state in general irregular shells of rotation of double curvature

2019 ◽  
Vol 484 (1) ◽  
pp. 35-40
Author(s):  
V. N. Bakulin
Keyword(s):  
Finite Element ◽  
Strain State ◽  
Element Model ◽  
Core Material ◽  
Layer By Layer ◽  
Shells Of Revolution ◽  
Stress Strain ◽  
Stress Strain State ◽  
Double Curvature ◽  
Layer Analysis

This study proposes a finite-element block approach to building a new, refined model for layer-by-layer analysis of the stress–strain state of generally irregular sandwich shells of revolution with double curvature. A core material model is developed for the first time for such shells, based on more precise statements compared to those of similar common models; it allows the avoidance of the discontinuity of generalized displacements on the surfaces of an interface with base layers and switching to simpler models depending on the problem statement. Using the proposed model, it is possible to create an allowance for the changes in the properties and parameters of the stress–strain state in all the three coordinates, to which the shell is assigned, and to obtain a solution within the specified statement for different shell shapes and boundary conditions of layers, including in the case of discontinuity.

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