loading page

Monitoring multiple damage mechanisms in crack-patched structures using optical infrared thermography
  • Ulrike Martens,
  • Kai-Uwe Schröder
Ulrike Martens
RWTH Aachen University
Author Profile
Kai-Uwe Schröder
RWTH Aachen University
Author Profile

Peer review status:IN REVISION

01 Jul 2020Submitted to Fatigue & Fracture of Engineering Materials & Structures
01 Jul 2020Assigned to Editor
01 Jul 2020Submission Checks Completed
18 Jul 2020Reviewer(s) Assigned
08 Aug 2020Review(s) Completed, Editorial Evaluation Pending
08 Aug 2020Editorial Decision: Revise Major


The use of passive infrared thermography comprises great opportunities to improve understanding the fatigue damage process of crack-patched structures. Quasi-static and cyclic coupon tests are performed using metallic specimens with single-sided bonded patches and monitored with passive infrared thermography. Different test setups help to differentiate between metallic crack growth and adhesive damage on thermal images. Results show that metallic crack growth can be monitored from the patched side, also in combination with local delamination at the patch/metal interface. Thus, it is possible to analyse the overall degradation progress of the crack patched component under loading conditions and thereby to identify the driving damage mechanism of the particular repair configuration. Being able to understand the overall damage behaviour of crack patched components is essential to improve the ability of predicting its long-term behaviour.