scholarly journals In-situ estimation of defect volume from parameters of acoustic emission signals

2021 ◽  
Vol 2103 (1) ◽  
pp. 012066
Author(s):  
E E Damaskinskaya ◽  
V L Hilarov ◽  
I A Panteleev ◽  
D V Korost ◽  
K A Damaskinskii
Keyword(s):  
Acoustic Emission ◽  
Defect Formation ◽  
Heterogeneous Material ◽  
Joint Analysis ◽  
Defect Accumulation ◽  
Computed Microtomography ◽  
X Ray Computed ◽  
Average Defect ◽  
Ct Data ◽  
Defect Volume

Abstract By using two methods of nondestructive testing, i.e., acoustic emission (AE) measurements and X-ray computed microtomography (CT), an experimental study of defect accumulation during a uniaxial compression of a natural heterogeneous material was carried out. A joint analysis of the AE and CT data revealed a correspondence between energy characteristics of the acoustic emission accompanying defect formation and volume of defects. It is shown that the dependence of the total energy of AE signals on the defect volume is linear, which is consistent with the phenomenological dependences for earthquake focuses obtained earlier. The linear dependence was used to estimate the average defect size. It is shown that, regardless of the assumed defect shape, its average linear size does not exceed 100 μm.

scholarly journals Структурно-энергетические закономерности накопления повреждений при деформировании гетерогенного материала

2021 ◽  
Vol 63 (1) ◽  
pp. 103
Author(s):  
Е.Е. Дамаскинская ◽  
И.А. Пантелеев ◽  
Д.В. Корост ◽  
К.А. Дамаскинский
Keyword(s):  
Defect Formation ◽  
Heterogeneous Material ◽  
Energy Characteristics ◽  
Defect Accumulation ◽  
Combined Use ◽  
Tectonic Earthquakes ◽  
Computed Microtomography ◽  
Ae Signal ◽  
X Ray Computed ◽  
Non Destructive

An experimental research of the defect accumulation under uniaxial loading of a natural heterogeneous material is carried out in this work. Defect formation process has been controlled using two non-destructive techniques (methods) such as acoustic emission (AE) and X-ray computed microtomography (CT). The combined use of these methods made it possible to find out correspondence between energy characteristics of AE accompanying the defect formation and the volume of these defects. It was found that total defect volume is lineary dependent on total AE signal energy. This fact corresponds to previously discovered phenomenological relationships for the sources of tectonic earthquakes. Mean defect size has been estimated based on obtained linear dependence. It was shown that mean linear size of defect does not exceed 100μm regardless of the assumptions about the defect shape.

Acoustic emission and X-ray computed microtomography characterization of damage accumulation in a woven Cf/SiC composite

2019 ◽  
Vol 155 ◽  
pp. 109748
Author(s):  
Yudong Xue ◽  
Qinglei Wang ◽  
Jianbao Hu ◽  
Haijun Zhou ◽  
Qingliang Shan ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Damage Accumulation ◽  
X Ray ◽  
Computed Microtomography ◽  
X Ray Computed

Evaluation of Crack Formation in Concrete and Basalt Specimens under Cyclic Uniaxial Load Using Acoustic Emission and Computed X-Ray Tomography

2016 ◽  
Vol 722 ◽  
pp. 247-253 ◽  
Author(s):  
Alexander N. Kravcov ◽  
Pavel Svoboda ◽  
Adam Konvalinka ◽  
Elena B. Cherepetskaya ◽  
Ivan E. Sas ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Main Crack ◽  
Crack Formation ◽  
Acoustic Emission Activity ◽  
X Ray ◽  
Stress Memory ◽  
Uniaxial Load ◽  
Computed Microtomography ◽  
Emission Activity ◽  
X Ray Computed

The paper discusses the use of acoustic emission, stress-memory effect, and X-ray computed microtomography (μST) to detect the onset of destruction of specimens of concrete and basalt which are widely used in construction. It is shown that the most informative parameter is acoustic emission activity based on which the onset of the formation of a main crack can be identified. The geometry of the crack is determined using computed X-ray tomography.

Determination of reservoir rock residual water using X-ray computed microtomography

2018 ◽  
pp. 38-42 ◽  
Author(s):  
I.V. Yazynina ◽  
◽  
E.V. Shelyago ◽  
A.A. Abrosimov ◽  
N.E. Grachev ◽  
...  
Keyword(s):  
Reservoir Rock ◽  
Residual Water ◽  
X Ray ◽  
Computed Microtomography ◽  
X Ray Computed

scholarly journals Author Correction: A quantitative analysis of 3D-cell distribution in regenerative muscle-skeletal system with synchrotron X-ray computed microtomography

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Markéta Tesařová ◽  
Lucia Mancini ◽  
Andras Simon ◽  
Igor Adameyko ◽  
Markéta Kaucká ◽  
...  
Keyword(s):  
Quantitative Analysis ◽  
Cell Distribution ◽  
Skeletal System ◽  
X Ray ◽  
Computed Microtomography ◽  
X Ray Computed

X-ray computed microtomography for the structural analysis of jewelry from the Museum “Royal Tombs of Sipán”

2020 ◽  
Vol 35 (S1) ◽  
pp. S38-S42
Author(s):  
Soraia Rodrigues de Azeredo ◽  
Roberto Cesareo ◽  
Angel Guillermo Bustamante Dominguez ◽  
Ricardo Tadeu Lopes
Keyword(s):  
Structural Analysis ◽  
High Resolution ◽  
Copper Alloys ◽  
North Coast ◽  
Flat Panel ◽  
X Ray ◽  
The North ◽  
Gold Silver ◽  
Computed Microtomography ◽  
X Ray Computed

Precious ornaments from the Museum Royal Tombs of Sipán were analyzed by X-ray computed microtomography (microCT). The ornaments analyzed were golden earrings produced by the Moche culture that flourished along the north coast of present-day Peru between approximately 100 and 600 AD. Sipán, also known as Huava Rajada, is a mochica archaeological complex in the north of Peru. In particular, the spectacular jewelry, mainly composed of gold, silver, and copper alloys, gilded copper, and tumbaga, from the Museum “Royal Tombs of Sipán,” in Lambayeque, north of Peru, are some of the most sophisticated metalworking ever produced of pre-Columbian America. A portable microCT system consisting of a high-resolution flat panel detector and a mini X-ray tube were used for the structural analysis of these ornaments. The microCT images show parts of the internal structure, highlighting the manufacturing technique and gold sheets joining techniques of the Moche artisans. Furthermore, the advantage of using the portable microCT system for nondestructive testing is clear when the sample cannot be taken to the laboratory.

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