Stress state in the vicinity of a circular hole in a cylindrical orthotropic shell

1970 ◽  
Vol 6 (11) ◽  
pp. 1180-1184 ◽  
Author(s):  
A. P. Mukoed
Keyword(s):  
Stress State ◽  
Circular Hole ◽  
Orthotropic Shell ◽  
Cylindrical Orthotropic Shell

scholarly journals Nonlinear Deformation of Flexible Orthotropic Shells of Variable Thickness in an Unsteady Magnetic Field

2019 ◽  
Vol 97 ◽  
pp. 02015 ◽  
Author(s):  
Zafar Abdullaev ◽  
Sayibdjan Mirzaev ◽  
Sobir Mavlanov
Keyword(s):  
Magnetic Field ◽  
Stress State ◽  
Electric Current ◽  
Variable Thickness ◽  
Nonlinear Deformation ◽  
Strain State ◽  
Orthotropic Shell ◽  
Mechanical Force ◽  
Time Varying ◽  
Orthotropic Shells

The analysis of the stress state of a flexible orthotropic shell under the influence of a time-varying mechanical force and a time-varying external electric current is performed, taking into account the mechanical and electromagnetic orthotropy. The effect of thickness on the stress-strain state of the orthotropic shell is investigated. The results obtained indicate the influence of thickness on the deformation of the shell and the need to take this factor into account in the design schemes.

scholarly journals Analysis of influence of circular hole on stress state of plate in pure bending condition

2021 ◽  
Vol 27 (1) ◽  
pp. 33-39
Author(s):  
Dragan Petrović ◽  
Milan Bižić
Keyword(s):  
Stress State ◽  
Circular Hole ◽  
Mathematical Formulation ◽  
Analytical Determination ◽  
Infinite Dimensions ◽  
Ansys Software ◽  
Pure Bending ◽  
Zone Of Influence ◽  
Analytical Expressions

The task of this paper is determining the zone of influence of a circular hole on the stress state of a homogeneous isotropic plate in pure bending condition. For solving the problem, the complex variable method was used which allows the complete analytical determination of the stresses at every point of the plate, and particularly on the contour of the circular hole. The analytical expressions for stresses in the plate of infinite dimensions were the basis for deriving a mathematical formulation which defines the zone as a function of diameter of the hole, inside which there is influence of the hole on the stress state of the plate. Obtained results are verified with FEM using the ANSYS software package whereby the input data for spatial discretization and mesh generation are not previously adjusted but was used a mesh that is generated automatically by the program.

Numerical Simulation of Impact Loading on Solid Propellant within an Orthotropic Shell

2015 ◽  
Vol 1085 ◽  
pp. 486-491 ◽  
Author(s):  
Pavel Radchenko ◽  
Andrey Radchenko ◽  
Stanislav Batuev
Keyword(s):  
Stress State ◽  
Solid Propellant ◽  
Orthotropic Shell ◽  
Three Dimensional ◽  
Strength Properties ◽  
Rocket Engines ◽  
Deformable Solid ◽  
Steel Cylinder ◽  
Fourth Degree ◽  
Strain Stress

The strain-stress state of the solid propellant rocket engines (SPRE) is simulated under impact. Orthotropic organoplastic is the material of the shell. The effect of orientation of elastic and strength properties of the shell material on the strain-stress state of the solid propellant is investigated. Normal interaction of single steel cylinder strikers and oblique impact, both simultaneous and at different times of multiple, converging steel spheric particles with SPRE are considered in the work. The investigation is conducted numerically. The numerical modeling was carried out in three-dimensional statement by a method of finite elements in frameworks of the continual approach of the mechanics of deformable solid. The destruction of the anisotropic material is described by tensor polynomial criterion of the fourth degree, which takes into account the influence of hydrostatic pressure.

scholarly journals Thermomechanical deformation of the orthotropic shell taking into account the deformation anisotropy

2021 ◽  
Vol 274 ◽  
pp. 03026
Author(s):  
Aleksandr Treshchev ◽  
Mariya Lapshina ◽  
Yulia Zavyalova
Keyword(s):  
Cylindrical Shell ◽  
Stress State ◽  
Circular Cylindrical Shell ◽  
Orthotropic Shell ◽  
Thermomechanical Properties ◽  
Design Practice ◽  
Stress Space ◽  
Deformation Anisotropy ◽  
Industrial Structures ◽  
Thermomechanical Deformation

A variant of the rotation shell in the particular form of a closed circular cylindrical shell, which is often used in the design practice of civil, power and other industrial structures, is considered. The specificity of the considered shell lies in the features of its material, which has a manifestation of dual anisotropy. In particular, this material is orthotropic in structure, and the nature of deformation shows the dependence of stiffness and strength on the type of stress state. The loading of the shell is assumed to be axisymmetric, taking into account the influence of a medium with variable thermal parameters. The temperature difference between the shell surfaces is taken into account here. The statement of the general thermomechanical problem is carried out in an unrelated form, taking into account a certain independence of the problems of thermodynamics and mechanics. Taking into account the limitations of the classical thermomechanical theories of shells made of materials with dual anisotropy and the fact that the known models for such materials have significant drawbacks, the authors used a variant of the normalized stress space. Differential equations of thermoelasticity for a cylindrical shell are obtained, taking into account the complicated thermomechanical properties of its material. Particular solutions with the features of the results of calculating the shell states are illustrated, and their analysis is carried out.

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