Detecting low-velocity impact damage in composite plates using infrared thermography

Jeff Brown; Robyn Anderson; David Visser

doi:10.1117/12.715758

9 April 2007 Detecting low-velocity impact damage in composite plates using infrared thermography

Jeff Brown, Robyn Anderson, David Visser

Proceedings Volume 6541, Thermosense XXIX; 654110 (2007) https://doi.org/10.1117/12.715758
Event: Defense and Security Symposium, 2007, Orlando, Florida, United States

Abstract

This research investigated low velocity impact damage in fiber-reinforced polymer (FRP) composites. Small-scale glass/epoxy laminates (approximately 210mm x 210mm x 2mm) were subjected to varying degrees of dynamic impact energies ranging from 5 to 20 J and infrared thermography inspections were performed on the damaged specimens. Three distinct damage modes were observed: penetration resulting in highly localized fiber rupture through the thickness of the composite; penetration/delamination in which localized fiber rupture was observed on the impacted surface and additional delamination occurred around the point of impact; and delamination/reverse side fiber rupture in which no visible damage occurred on the impacted surface but fiber rupture and delamination occurred beneath the surface. A modified lock-in thermography procedure was used in the nondestructive evaluation (NDE). Phase images were constructed by applying a least-squares sinusoidal curve fit to a series of thermal images collected over one cycle of sinusoidal heating. This method was shown to increase contrast for subsurface delaminations compared to raw thermal data. Finally, thermography results for FRP composite samples containing simulated damage (back-drilled holes) were compared with thermography results from impact-damaged samples.

Citation Download Citation

Jeff Brown, Robyn Anderson, and David Visser "Detecting low-velocity impact damage in composite plates using infrared thermography", Proc. SPIE 6541, Thermosense XXIX, 654110 (9 April 2007); https://doi.org/10.1117/12.715758

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available