Paper Info
Title
PCA Based Stress Monitoring of Cylindrical Specimens Using PZTs and Guided Waves.
Abstract
Since mechanical stress in structures affects issues such as strength, expected operational life and dimensional stability, a continuous stress monitoring scheme is necessary for a complete integrity assessment. Consequently, this paper proposes a stress monitoring scheme for cylindrical specimens, which are widely used in structures such as pipelines, wind turbines or bridges. The approach consists of tracking guided wave variations due to load changes, by comparing wave statistical patterns via Principal Component Analysis (PCA). Each load scenario is projected to the PCA space by means of a baseline model and represented using the Q-statistical indices. Experimental validation of the proposed methodology is conducted on two specimens: (i) a 12.7 mm (1/2 ") diameter, 0.4 m length, AISI 1020 steel rod, and (ii) a 25.4 mm (1 ") diameter, 6m length, schedule 40, A-106, hollow cylinder. Specimen 1 was subjected to axial loads, meanwhile specimen 2 to flexion. In both cases, simultaneous longitudinal and flexural guided waves were generated via piezoelectric devices (PZTs) in a pitch-catch configuration. Experimental results show the feasibility of the approach and its potential use as in-situ continuous stress monitoring application.
Year
DOI
Venue
2017
10.3390/s17122788
SENSORS
Keywords
Field
DocType
acoustoelasticity,stress monitoring,guided waves,piezoelectrics,statistical analysis,cylindrical waveguide
Stress monitoring,Hollow cylinder,Flexural strength,Cylinder,Electronic engineering,Stress (mechanics),Engineering,Guided wave testing,Principal component analysis,Piezoelectricity,Structural engineering
Journal
Volume
Issue
ISSN
17
12.0
1424-8220
Citations 
PageRank 
References 
3
0.57
1
Authors
5
Name
Order
Citations
PageRank
Jabid Quiroga130.57
L. E. Mujica262.70
Rodolfo Villamizar330.91
Magda Ruiz452.34
Jhonatan Camacho530.91