An objective of this article is to investigate the initiation and propagation mechanisms of the impact-induced interior damage with scanned image microscopy. Impact tests by an air-gun type of apparatus were undertaken on a series of CFRP laminated specimens having different ply orientations such as [06/θ10/06]. The tests were conducted under the conditions of the same impact velocity of 60m/s and same impact energy level of two Joule for two steel balls (i.e., impactor) of different diameters. A mechanical scanning acoustic reflection microscope (pulse-wave mode) revealed the delamination at specified interfaces. A scanning electron microscope revealed transverse cracks in the form of matrix cracking or fiber/matrix debonding at the cross-sectional area.

Topics:
Carbon reinforced plastics, Composite materials, Damage, Microscopy, Acoustics, Cracking (Materials), Delamination, Energy levels (Quantum mechanics), Fibers, Fracture (Materials), Fracture (Process), Impact testing, Joules, Microscopes, Reflection, Scanning electron microscopes, Steel, Waves
This content is only available via PDF.
Copyright © 2003
 by ASME
You do not currently have access to this content.