This paper presents an application of the fractal analysis method to acoustic emission signals for detecting nucleation and propagation of cracks in pressure equipment. Fractal analysis has proven to be an effective way to understand the physics of acquired acoustic emissions as their intensity and nature are strictly related to the stress intensity and the damage level of the material and can therefore be adopted as a tool for monitoring the health of various structures. Fractal dimension (Dt), as a measure of order/disorder of the signals, evolves according to the applied stress (σ), pressure (p) and cycles count (N). Evolution can be inspected on the charts Dt -p or Dt -N that become useful tools for evaluating nucleation and propagation of a fatigue crack and to identify how the structure is close to the failure. Results provided by such approach can be used in combination with other experimental and theoretical techniques to forecast the damage and provide an estimation of residual life. The proposed approach has been successfully applied to acoustic emission data of three pressure tanks at known state of ageing. Fractal analysis method, in a good agreement with other well-stated methods based on acoustic emissions, allows assessing the damage status of the tank.
M E, B., Brutti, C., Zanini, A., & Salvini, P. (2019). Acoustic Emission data fractal analysis for structural integrity assessment of pressure equipment. Paper presented at 1st EPERC International Conference.
|Autori:||M E, B; Brutti, C; Zanini, A; Salvini, P|
|Titolo:||Acoustic Emission data fractal analysis for structural integrity assessment of pressure equipment|
|Nome del convegno:||1st EPERC International Conference|
|Data di pubblicazione:||apr-2019|
|Settore Scientifico Disciplinare:||Settore ING-IND/14 - Progettazione Meccanica e Costruzione di Macchine|
|Tipologia:||Intervento a convegno|
|Citazione:||M E, B., Brutti, C., Zanini, A., & Salvini, P. (2019). Acoustic Emission data fractal analysis for structural integrity assessment of pressure equipment. Paper presented at 1st EPERC International Conference.|
|Appare nelle tipologie:||02 - Intervento a convegno|