Dynamic Fracture Model for Acoustic Emission

TL;DR

This paper introduces a dynamic fracture model that links acoustic emissions from micro-cracks to internal damage, showing power-law energy burst distributions consistent with experiments and relating dynamic and quasi-static fracture models.

Contribution

A novel two-dimensional dynamic fracture model that connects acoustic emission patterns to internal damage and relates dynamic and quasi-static fracture behaviors.

Findings

Acoustic energy bursts follow a power-law distribution.

Scaling exponents match experimental and quasi-static models.

Model provides insight into micro-crack dynamics and damage assessment.

Abstract

We study the acoustic emission produced by micro-cracks using a two-dimensional disordered lattice model of dynamic fracture, which allows to relate the acoustic response to the internal damage of the sample. We find that the distributions of acoustic energy bursts decays as a power law in agreement with experimental observations. The scaling exponents measured in the present dynamic model can related to those obtained in the quasi-static random fuse model.