Features of the reflection of an acoustic beam from a surface with nonuniform boundary conditions. I. Theoretical analysis

Baev, A. R.; Asadchaya, M. V.

doi:10.1134/s1061830910080012

Cited by 4 publications

(2 citation statements)

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“…It concerns requirements to geometry of objects, state of their surface, etc. The authors [9] on the basis of deterministic approach in 2D formulation develop the method of detecting weakly detectable defects, when the phase shift between the waves scattered at the defect and defect free boundary magnitude of θ = π /4 -π. In [10] the ultrasonic scattering fields in three-dimensional space -in different planes of the directional cross section of the ultrasonic scattering field DD, characterized by equatorial (ψ = 0 -π) and azimuthal (ψ = 0 -π /2) angles are investigated.…”

Section: Introductionmentioning

confidence: 99%

Influence of Geometry and Boundary Conditions in Area of Cohesion between Materials on the Reflection of an Ultrasonic Beam. Part 1. Theoretical research

Bayev

Mayorov

Levkovich

et al. 2021

Prib. metody izmer.

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The improvement of efficiency, reliability and productivity of ultrasonic testing of objects with cohesion between materials connected by welding, soldering, gluing, etc. is 'an important problem of the modern production technologies. The purpose of the paper is to determine in 3D space the conditions for increasing the sensitivity and reliability of the flaw detection in the cohesion zone between materials when the form of defect interface can be different.In the first part of the theoretical study the features of the formation of the acoustic fields of ultrasonic waves scattered from solid's interface when spot of an acoustic beam crosses the boundary of the defective region in the shape of an ellipse or a long strip have been investigated. In this case, the boundary conditions in the defect area change discretely or linearly.It was suggested to use a phase shift between reflected waves from the defect and defect-free interfaces as the more informative parameter depending on the cohesion between materials. There is shown that there are conditions to achieve sufficiently high sensitivity detection of interface defects when the scattered waves receiving are to be at angles outside the main directivity lobe of the scattering field pattern. The evolution features of the scattering field structure which are needed for the development of the method of evaluation the cohesion of materials has been got.

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Section: Introductionmentioning

confidence: 99%

Influence of Geometry and Boundary Conditions in Area of Cohesion between Materials on the Reflection of an Ultrasonic Beam. Part 1. Theoretical research

Bayev

Mayorov

Levkovich

et al. 2021

Prib. metody izmer.

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“…In modern construction, construction safety is especially important. Hence major factors influencing crack formation of steel reinforced concrete structure needs to be further studied [2,3]. Large binding force between section steel and concrete is the foundation ensuring their coordination in steel reinforced concrete structure [4].…”

Section: Introductionmentioning

confidence: 99%

Crack formation of steel reinforced concrete structure under stress in construction period

Zhu¹

2016

Frattura Ed Integrità Strutturale

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To obtain deformation rules of steel reinforced concrete structure under stress, this study explored the crack formation in construction period. A novel structure system -steel reinforced concrete structure with shear wall and truss at the bottom was analyzed using on-the-spot test in combination with theoretical simulation analysis with SAP2000 software. It was found that, factors influencing crack formation of steel reinforced concrete structure in construction period included construction load, creep of concrete, shrinkage of concrete, displacement of bond of section steel and concrete as well as leveling. In the construction period, the simulated results and the measured results were highly fitted under the influence of time-variant characteristics such as compressive strength, elasticity modulus, creep and shrinkage. Through processing and analyzing the measured data, we obtained the development rules of crack formation of steel reinforced concrete structure with different strength grades as well as deformation rules of time-varying structure system in construction period, figured out the reason for the difference between the simulated results and the measured results, analyzed the deformation of structural components under stress in construction period and proposed some suggestions. This work is beneficial to ensure safe and high-efficient operation of construction.

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Features of the reflection of an acoustic beam from a surface with nonuniform boundary conditions. II. Experiments

Baev

Майоров

Asadchaya

et al. 2010

Russ J Nondestruct Test

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Features of the reflection of an acoustic beam from a surface with nonuniform boundary conditions. I. Theoretical analysis

Cited by 4 publications

References 0 publications

Influence of Geometry and Boundary Conditions in Area of Cohesion between Materials on the Reflection of an Ultrasonic Beam. Part 1. Theoretical research

Influence of Geometry and Boundary Conditions in Area of Cohesion between Materials on the Reflection of an Ultrasonic Beam. Part 1. Theoretical research

Crack formation of steel reinforced concrete structure under stress in construction period

Features of the reflection of an acoustic beam from a surface with nonuniform boundary conditions. II. Experiments

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