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Comparison of non-destructive techniques for impact damage area assessment in aramid/epoxy composites
* 1 , 2 , 1 , 2 , 1
1  Politecnico di Milano, Department of Mechanical Engineering, Milano (20156), Italy
2  PPGE3M, Federal University of Rio Grande do Sul, Porto Alegre (91501-970), Brazil


This research focused on the assessment of the damaged area on aramid/epoxy composites subjected to high velocity impact. Digital X-ray radiography and active pulsed thermography techniques were used for performing post-mortem analysis of the impacted specimens (8 to 28 aramid layers). Two types of projectiles were used: 9 mm Luger FMJ and .357 Magnum FMJ. Dedicated algorithms were developed to post-process the thermograms obtained and the results are compared with the damaged diameter measured directly on the X-ray radiographs. The output of the three methods are therefore compared and discussed.

Keywords: impact; thermography; aramid; digital X-ray radiography