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  4. Research of acoustic emissions from the system of complanary cracks

Research of acoustic emissions from the system of complanary cracks

CDS.
2021;
Volume 3, Number 1
: pp. 45 - 50
https://doi.org/10.23939/cds2021.01.045
Authors:
  1. О. Stankevych
  2. N. Stankevych
1
Lviv Polytechnic National University
2
Ivan Franko National University of Lviv

The dynamic problem of the displacement field in an elastic half-space caused by the timesteady displacement of the surfaces of the system of disc-shaped coplanar cracks is solved. The solutions are obtained by the method of boundary integral equations. The dependences of elastic displacements on the surface of the half-space on the wave number, the number of defects and the depths of their occurrence are constructed.

half-space
penny-shaped crack
acoustic emission
boundary integral equations method
  1. Carpinteri А., Lacidogna G. Acoustic Emission and Critical Phenomena: From Structural Mechanics to Geophysics. CRC Press, 2008. 267 p.
  2. Godin N., Reynaud P., Fantozzi G. Acoustic emission and durability of composite materials. Wiley, 2018. 206 p.
  3. Li D. Rail crack monitoring using acoustic emission technique. Springer, 2018. 157 p.
  4. Ohtsu M. Innovative AE and NDT techniques for on-site measurement of concrete and masonry structures. Springer, 2016. 185 p.
  5. Andreykiv O., Skalsky V., Serhiyenko O., Rudavskyy D. Acoustic emission estimation of crack formation in aluminium alloys // Engineering Fracture Mechanics. 2010. 77 (5). P. 759−767.
  6. Keshtgar A., Modarres M. Detecting crack initiation based on acoustic emission // Chemical Engineering Transactions. 2013. 33. P. 547−552.
  7. Lysak M.V. Acoustic emission during jumps in subcritical growth of crack in three-dimensional bodies // Engineering Fracture Mechanics. 1994. 47 (6). P. 873−879.
  8. Wolf J.; Pirskawetz S.; Zang A. Detection of crack propagation in concrete with embedded ultrasonic sensors // Engineering Fracture Mechanics. 2015. 146. P. 161–171.
  9. Nazarchuk Z., Skalskyi V., Serhiyenko O. Acoustic emission. Methodology and application. Springer, 2017. XIV, 283 p.
  10. Skalskyi V., Stankevych O., Serhiyenko O. Wave displacement field at half-space surface caused by an internal crack under twisting load // Wave Motion. 2013. 50 (2). P. 326−333.
  11. Stankevych O., Skalskyi V. The vibration of a half-space due to a buried mode I crack opening // Wave Motion. 2017. 72. P. 142−153.
  12. Stankevych V. Z. Stress intensity near a crack in the composition of a half space and a layer under harmonic loading // Materials Science. 2008. 44(2). P. 175–182.
  13. Zhang Ch., Gross D. On wave propagation in elastic solids with cracks. Comp. Mech. Publ., 1998. 267 p.
  14. Stankevich V.Z. Computation of certain double integrals those are characteristic of dynamic problems of the theory of cracks in a semi-infinite body // Journal of Mathematical Sciences. 1996. 81(6). P. 3048–3052.