Unit:
Κατεύθυνση Εφαρμοσμένη Γεωλογία - ΓεωφυσικήLibrary of the School of Science
Supervisors info:
Φίλιππος Βαλλιανάτος, Καθηγητής, Τμήμα Γεωλογίας και Γεωπεριβάλλοντος ΕΚΠΑ
Original Title:
A NON-EXTENSIVE STATISTICAL PHYSICS VIEW OF ACOUSTIC EMISSIONS RECORDED DURING UNIAXIAL COMPRESSION THROUGH FRACTURE
Translated title:
A NON-EXTENSIVE STATISTICAL PHYSICS VIEW OF ACOUSTIC EMISSIONS RECORDED DURING UNIAXIAL COMPRESSION THROUGH FRACTURE
Summary:
This thesis investigates the utilization of non-extensive statistical physics (NESP), with a focus on the q-Gaussian distribution, as a powerful tool for analyzing acoustic emissions (AE) data obtained from an experiment on uniaxial compression loading.
The experimental setup involves subjecting a limestone sample to uniaxial compression linear loading and recording the corresponding AE signals. During the experiment a total of 371 AE signals were selected and analyzed, which serve as the basis for the subsequent analysis under the NESP framework. The analysis of the AE data using the q-Gaussian distribution entails fitting the observed data to the distribution's parameters. This process provides insights into the system's non-extensive features, such as the value of the entropic index q, which characterizes the departure from traditional statistical physics. This distribution provides a flexible framework capable of capturing deviations from traditional Gaussian statistics, allowing for the description of long-range correlations and power-law tails often observed in complex systems.
The findings contribute to the understanding of fracture phenomena and offer potential insights into the mechanical behavior of materials under stress. The research serves as a foundation for further investigations in the field of non-extensive statistical physics and its applications in materials science and seismology.
Main subject category:
Science
Keywords:
statistical analysis, non-extensive statistical physics, entropic index q, q-Gaussian distribution, acoustic emissions
