Abstract
The relationships between the sequence of deformational and fracture stages in solids and the integral parameters of an accompanying acoustic emission (AE) are analyzed. A method for reconstruction of the true (radiated) intensity of flow, the spectrum, and the duration and energy of an AE-act is described and the results obtained are presented. The S-shape of the curve of AE-act flow is physically interpreted. The possibility of identifying the fracture stages and, based on the positions of the break points in this curve, estimating the concentration of defects and their multiplication constants is shown. It is found that the lower break point in the curve corresponds to the transition point from the stage of plastic deformation to the stage of scattered accumulation of flaws. It is suggested that the appearance of this break point be used for the early detection of a material’s destruction point. The upper break point is interpreted as the point of a change in the multiplication constant caused by the beginning of the localization of the defect generation process.
Similar content being viewed by others
REFERENCES
S.I. Builo (1989) On the Relationship between the Acoustic Emission Parameters and the Kinetic Features of Deformation and Microfracture of Solids Akusticheskaya emissiya materialov i konstruktsii Izd. Rostov. Gos. Univ. Rostov-on-Don 125–132
Builo, S.I., Distortions of Acoustical Emission Signals and Some Peculiarities of Reconstruction of the Statistical Characteristics of Radiation Sources, Tekh. diagnostika i nerazrushayushchii kontrol’, 1989, no. 1, pp. 15–23.
Builo, S.I., The Use of Statistical Radiophysical Models for Improving the Reliability of Acoustic-Emission Inspection Results and Diagnostics of Prefracture States, Defektoskopiya, 1995, no. 7, pp. 14–26.
Builo, S.I., Determination of the Parameters of Damage Accumulation Processes and Estimation of the Fracture Criterion Based on Reconstructed Values of Acoustic Emission Characteristics, Defektoskopiya, 1997, no. 7,pp. 84–89.
S.I. Builo A.I. Kozinkina (1996) ArticleTitleOn the Estimation of Damage Accumulation and the Moment of Transition from Diffuse to Located Flaw Generation Based on Reconstructed Values of Acoustic Emission Characteristics Fiz. Tverd. Tela 38 IssueID11 3381–3384
Builo, S.I., Acoustic-Emission Testing and Diagnostics of Hazardous Dynamic Processes in a Coal Seam, Defektoskopiya, 2000, no. 4, pp. 54–63 [Rus. J. of Nondes. Testing (Engl. Transl.), 2000, vol. 36, no. 4, p. 282].
Builo, S.I. and Bezhenov, S.A., Investigation of Acoustic Emission Due to Deformation of a Titanium Alloy and Some Results of Acoustic-Emission Diagnostics of Its Predestruction States Defektoskopiya, 2000, no. 5, pp. 3–11[Rus. J. of Nondes. Testing (Engl. Transl.), 2000, vol. 36, no. 5, p. 307].
Builo, S.I., Diagnostics of Fracture Stages of Materials Based on Reconstructed Parameters of Acoustic Emission, Kontrol’. Diagnostika, 2000, no. 10, pp. 10–15.
V.S. Ivanova et al. (1994) Sinergetika i fraktaly v materialovedenii Nauka Moscow
N.A. Koneva E.V. Kozlov (1990) ArticleTitlePhysical Nature of Plastic Deformation Stage Mechanism Izv. Vyssh. Uchebn. Zaved., Fiz. 33 IssueID2 89–106
V.A. Likhachev V.G. Malinin (1990) ArticleTitleStructural-Analytical Theory of Strength in a Multilevel Definition Izv. Vyssh.Uchebn. Zaved., Fiz. 33 IssueID2 121–139
Rybakova, L.M., Mechanical Regularities of Metal Destruction due to Volume and Surface Plastic Deformation, Probl. mashinostroeniya i nadezhnosti mashin, 1998, no. 5, pp. 113–124.
K. Chui (2001) Introduction into Wavelets Mir Moscow
Builo, S.I. and Tripalin, A.S., Acoustic-Emission Testing of the Quality of Materials, USSR Inventor’s Certificate no. 1320739 MKI4 G 01 N 29/04, Byull. Izobret., 1987, no. 24, p. 207.
S.N. Zhurkov V.S. Kuksenko V.A. Petrov (1983) Is it Possible to Predict Destruction? Budushchee nauki Znanie Moscow 100–111
Builo, S.I., The Use of Statistical Models for the Quantitative Evaluation of Distortions of Amplitude Distributionsof Acoustic-Emission Signals and Improving the Reliability of Acoustic-Emission Testing Results, Defektoskopiya,1996, no. 5, pp. 26–34.
S.I. Builo (1988) Application of the Model of a Pulsed Flow of Grouped Acoustic-Emission Events in the Diagnosticsof the Predestruction State of Heterogeneous Materials Fizika prochnosti geterogennykh materialov Izd. Fiz.-Tekh. Inst. Leningrad 153–158
Builo, S.I. and Popov, A.V., Acoustic-Emission Methods for Assessing the Process of Damage Accumulation in Estimating Remaining Service Lives of Heavily Loaded Structures, Defektoskopiya, 2001, no. 9, pp. 45–53 [Rus. J. of Nondes. Testing (Engl. Transl.), 2001, vol. 37, no. 9, p. 636].
V.V. Bolotin (1984) Prognozirovanie resursa mashin i konstruktsii Mashinostroenie Moscow
Author information
Authors and Affiliations
Additional information
Translated from Defektoskopiya, Vol. 40, No. 8, 2004, pp. 66–78.
Original Russian Text Copyright © 2004 by Builo.
Rights and permissions
About this article
Cite this article
Builo, S.I. Diagnostics of deformational and fracture stages based on integral parameters of the flow of acoustic-emission acts. Russ J Nondestruct Test 40, 552–560 (2004). https://doi.org/10.1007/s11181-005-0093-x
Received:
Issue Date:
DOI: https://doi.org/10.1007/s11181-005-0093-x