On a case of the equivalent modulus of elasticity depending on the form of stress state

1969 ◽  
Vol 5 (2) ◽  
pp. 214-216 ◽  
Author(s):  
V. N. Bastun
Keyword(s):  
Stress State ◽  
Modulus Of Elasticity ◽  
Equivalent Modulus

The Stress State in Inhomogeneous Elastic Beam at Combined Strength

2014 ◽  
Vol 501-504 ◽  
pp. 645-648 ◽  
Author(s):  
Vladimir I. Andreev ◽  
Elena V. Barmenkova ◽  
Alena V. Matveeva
Keyword(s):  
Inverse Problem ◽  
Stress State ◽  
Modulus Of Elasticity ◽  
Elastic Beam ◽  
Bending Moment ◽  
Optimization Method ◽  
Theory Of Elasticity ◽  
Simultaneous Action ◽  
Concentrated Force ◽  
Inhomogeneous Bodies

In paper describes a method of optimization the stress state of an elastic beam, subjected to the simultaneous action of the central application of concentrated force and bending moment. Optimization method based on solving the inverse problem of the theory of elasticity of inhomogeneous bodies, the essence of which is to determine the law of changing the modulus of elasticity on the beams height for which stress state will be given.

A contact free measurement method to determine internal stress states in glulam

Holzforschung ◽  
2004 ◽  
Vol 58 (2) ◽  
pp. 148-153 ◽  
Author(s):  
J. Jönsson ◽  
S. Svensson
Keyword(s):  
Stress State ◽  
Internal Stress ◽  
Modulus Of Elasticity ◽  
Digital Camera ◽  
End Effects ◽  
Static Modulus ◽  
Stress States ◽  
Static Modulus Of Elasticity ◽  
Contact Free ◽  
Destructive Measurement

Abstract A method to determine the internal stress state across the grain of glued laminated wood (glulam), as well as the experimental equipment for measuring released deformation are described in this paper. The internal stress state is calculated from measured released deformations, which are measured by a contact free method based on a digital camera technique. Non-destructive measurement of the modulus of elasticity in the cross-grain direction is presented and the correlation between dynamic and static modulus of elasticity is shown. Results for a single specimen with induced moisture gradient show that the largest stress found in the tests was about 0.57 MPa, which is higher than the characteristic value of tensile strength perpendicular to the grain. This stress is based on released strain over the total length of the slices cut from the specimens. FEM-simulations evaluating the stress distribution within the specimen to account for end effects indicate that the maximum stress is about 30% higher.

Stress State of Hemispherical Shell in the Frontal Movement of the Radiation Field

2013 ◽  
Vol 405-408 ◽  
pp. 1073-1076 ◽  
Author(s):  
Vladimir I. Andreev ◽  
Ivan A. Dubrovskiy
Keyword(s):  
Stress State ◽  
Power Plant ◽  
Nuclear Power Plant ◽  
Neutron Flux ◽  
Radiation Field ◽  
Modulus Of Elasticity ◽  
Nuclear Power ◽  
Hemispherical Shell

The article considers the influence of neutron flux on the reactor hemispherical shell protection, depending on time. Diagrams of the variations of modulus of elasticity, of strain and stress appearing during the operation of the nuclear power plant are given.

A Note on the Equivalent Modulus of Elasticity of Stay Cables

2011 ◽  
Vol 255-260 ◽  
pp. 1266-1269
Author(s):  
Yi Xiao ◽  
Wei Dong Zhuo ◽  
Li Chu Fan
Keyword(s):  
Modulus Of Elasticity ◽  
Proper Choice ◽  
Stay Cables ◽  
Equivalent Modulus

A new equivalent modulus of elasticity of stay cables is derived based on previous research works. The result of the proposed formula is close to Ernst’s formula and can be regarded as a theoretical supplement of existing works. Compared with the preset formula and other related works, Ernst’s formula is a proper choice for the equivalent modulus of elasticity of stay cables.

scholarly journals Proposal of Design Formulae for Equivalent Elasticity of Masonry Structures Made with Bricks of Low Modulus

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Muhammad Ridwan ◽  
Isamu Yoshitake ◽  
Ayman Y. Nassif
Keyword(s):  
Elastic Modulus ◽  
Modulus Of Elasticity ◽  
Elastic Moduli ◽  
Masonry Structures ◽  
Quadrilateral Elements ◽  
Fe Simulations ◽  
Low Elastic Modulus ◽  
Low Modulus ◽  
Equivalent Modulus ◽  
Simplified Formula

Bricks of low elastic modulus are occasionally used in some developing countries, such as Indonesia and India. Most of the previous research efforts focused on masonry structures built with bricks of considerably high elastic modulus. The objective of this study is to quantify the equivalent elastic modulus of lower-stiffness masonry structures, when the mortar has a higher modulus of elasticity than the bricks, by employing finite element (FE) simulations and adopting the homogenization technique. The reported numerical simulations adopted the two-dimensional representative volume elements (RVEs) using quadrilateral elements with four nodes. The equivalent elastic moduli of composite elements with various bricks and mortar were quantified. The numerically estimated equivalent elastic moduli from the FE simulations were verified using previously established test data. Hence, a new simplified formula for the calculation of the equivalent modulus of elasticity of such masonry structures is proposed in the present study.

scholarly journals SELECTED PROBLEMS OF RHEOLOGY IN THE CONTEXT OF ROCKS BEHAVIOUR. VARIABILITY OF THE MODULUS OF ELASTICITY AS AN EXAMPLE OF THE INFLUENCE OF TIME AND STRESS FACTORS

2021 ◽  
Author(s):  
Krzysztof Tomiczek ◽  
Keyword(s):  
Rock Mass ◽  
Stress State ◽  
Rock Mechanics ◽  
Modulus Of Elasticity ◽  
Soil Mechanics ◽  
Time Factor ◽  
Stress Factors ◽  
Short Term ◽  
Creep Tests ◽  
The Moment

Most of the solutions to the problems of rock mechanics, rock mass mechanics, but also soil mechanics and geotechnics ignore the influence of the time factor. The solutions are here and now, at the moment. Meanwhile, plastic-viscosity properties, when rocks are in a 3D stress state, play more and more importance in the course of time. The deformability variability is of particular importance, as measured by the modulus of elasticity E. This chapter analyzes the magnitude of this modulus obtained in uniaxial short-term tests and creep tests of a well-known and described, typical sandstone, at different stress values 0=const

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