Acoustic Emission Damage Detection during Three-Point Bend Testing of Short Glass Fiber Reinforced Composite Panels: Integrity Assessment

In this study, an acoustic emission (AE) technique was used as a passive non-destructive tool to detect the damage progress in short glass fiber-reinforced composite panels. AE detection was conducted during three-point bend tests, thus illustrating the flexural damage accumulation for composite pan...

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Bibliographic Details
Published inJournal of composites science Vol. 6; no. 2; p. 48
Main Authors Nazaripoor, Hadi, Ashrafizadeh, Hossein, Schultz, Ryan, Runka, Joel, Mertiny, Pierre
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.02.2022
Subjects
acoustic emission
Acoustic emission testing
Acoustics
Bend tests
Breakage
Carbon
Civil engineering
Classification
Composite materials
Corrosion
Crack initiation
Cracking (fracturing)
cumulative signal strength
Damage accumulation
Damage detection
Delamination
Emission analysis
Failure mechanisms
Fiber composites
Fiber volume fraction
flexural testing
Fracture mechanics
Glass fibers
Integrity
integrity assessment
Microcracks
Panels
Parameters
Pattern recognition
Peak frequency
Polymers
Propagation
Sensors
short fiber polymer composites
Signal strength
Technical literature
Waveforms
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Summary:In this study, an acoustic emission (AE) technique was used as a passive non-destructive tool to detect the damage progress in short glass fiber-reinforced composite panels. AE detection was conducted during three-point bend tests, thus illustrating the flexural damage accumulation for composite panels with different sizes and fiber volume content. To demonstrate the universality of the employed integrity assessment methodology, AE data was detected using different timing parameters and two different transducer types, i.e., medium-band and wide-band frequency sensors. The AE waveform classification presented in this study is based on peak frequency distributions. Frequency bands that are associated with certain failure mechanisms, including matrix micro-cracking, fiber debonding, delamination, and fiber breakage, were obtained from the technical literature. Through this investigation, the concept of cumulative signal strength (CSS) and cumulative rise time versus peak amplitude ratio (CRA) as AE output parameters are shown to facilitate integrity assessment for the employed complex composite material system. Significant jumps in CSS and CRA curves could be correlated to critical strain levels and distinct damage events in the composite panels subjected to flexural loading.
ISSN:2504-477X
2504-477X
DOI:10.3390/jcs6020048