| About this Abstract |
| Meeting |
2024 ASC Technical Conference, US-Japan Joint Symposium, D30 Meeting
|
| Symposium
|
2024 ASC Technical Conference, US-Japan Joint Symposium, D30 Meeting
|
| Presentation Title |
In-Situ Measurement of Damage Appearance and Growth During Ballistic Impact Tests on Composite Materials |
| Author(s) |
Julien Berthe, Gérald Portemont, Thomas Fourest |
| On-Site Speaker (Planned) |
Julien Berthe |
| Abstract Scope |
Measuring the appearance and propagation of damage during impact testing remains a difficult task. A recent study (by the authors) using high-speed infrared thermography has shown that this measurement technique gives access to in-situ damage measurement during low velocity impact tests. In particular, matrix cracking in the surface ply and delamination of the first interface below the non-impacted surface can be monitored. The aim of this study is to evaluate the possible extension of this methodology to high velocity impacts. For that purpose, ballistic impact tests were carried out using a gas gun and a rigid 16 mm diameter ball. Various impact velocities were tested between 40 m.s-1 and 75 m.s-1, preferably below the ballistic limit. An infrared mirror was used to monitor the opposite surface using an infrared camera. A metrological investigation with an extended blackbody was performed to ensure that temperature measurement is not disturbed by this specific configuration. The stacking sequence used for this experimental investigation is a [0/+60/-60]ns made from T700/M21 UD ply leading to a total thickness of approximately 3.25 mm. This may allow direct comparison with the results available in the literature on a triaxially braided composite material with the same fibre orientations. Although the number of images captured for these high-speed impact configurations is limited, they nevertheless provide some information about the damage scenario during these tests. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |