Microcracking in tensile fracture of a brittle rock

Xiaoran Wang, Pouyan Asem, Chen Hu, Joseph F. Labuz

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20 Scopus citations


Acoustic emission (AE) and digital image correlation were used to monitor mode I fracture in center notch and smooth boundary specimens. The AE source was characterized as a microcrack and represented by the moment tensor, which was obtained by minimizing the error between displacements calculated from an elastodynamic solution and those measured, subjected to the constraint of a microcrack source. Results showed that microcracking was locally mixed-mode dominant because of oblique microcrack planes within a tortuous fracture. However, the microcrack mechanisms decomposed in the global coordinate system indicated mainly mode I opening with modes II and III ten times smaller.

Original languageEnglish (US)
Article number107789
JournalEngineering Fracture Mechanics
StatePublished - Jun 15 2021

Bibliographical note

Funding Information:
This work was partially supported by the MSES / Miles Kersten Chair and the National Natural Science Foundation of China (Grant No. 51774280 and 51934007).

Publisher Copyright:
© 2021 Elsevier Ltd


  • Acoustic emission
  • Digital image correlation
  • Displacement discontinuity
  • Energy dissipation
  • Moment tensor inversion


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