scholarly journals Characterization of multi-layered impact damage in polymer matrix composites using lateral thermography

2017 ◽  
Author(s):  
Travis Whitlow ◽  
Shamachary Sathish
Keyword(s):  
Polymer Matrix ◽  
Polymer Matrix Composites ◽  
Impact Damage ◽  
Matrix Composites

Azimuthally Scanned Angled-Beam Pulse-Echo Ultrasound for Characterization of Impact Damage in Composites

2020 ◽  
Vol 3 (3) ◽  
Author(s):  
John T. Welter ◽  
Daniel M. Sparkman ◽  
John C. Aldrin ◽  
David Zainey ◽  
Tyler Lesthaeghe ◽  
...  
Keyword(s):  
Polymer Matrix Composites ◽  
Impact Damage ◽  
Slow Crack Growth ◽  
Normal Incidence ◽  
Matrix Composites ◽  
Transverse Cracks ◽  
X Ray Computed ◽  
Ultrasound Inspection ◽  
Pulse Echo

Abstract Characterization of barely visible impact damage (BVID) in polymer matrix composites (PMCs) is necessary to use slow crack growth damage tolerance models and evaluate remaining life of PMC components. Azimuthally scanned angled-beam pulse-echo ultrasound is investigated as a complimentary technique to normal incidence ultrasound inspection of BVID in PMCs to characterize delamination fields. It is found that there is a correlation between signals present in the azimuthally scanned angled-beam pulse-echo ultrasound C-scans and transverse cracks seen in X-ray computed tomography inspection. These transverse cracks are not readily identifiable as transverse cracks in normal incidence C-scan inspection.

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