• Ousji, Hamza
• Belkassem, Bachir
• Louar, Mohamed Abderaouf
• Pyl, Lincy
• Spranghers, Ken
• Kakogiannis, Dimitrios
• Vantomme, Johnny

Abstract

To accurately identify the material characteristics in material testing, the control of the initial and<br/>boundary conditions is very important. Among these conditions, obtaining a repeatable and known<br/>loading is a sensitive point especially for tests in the dynamic and impulsional range. Several techniques<br/>are used to generate blast wave loads. This paper focuses on the use of an explosive driven shock tube<br/>(EDST). The results of a series of tests using an EDST are discussed, with regard to the pressure, the<br/>impulse, the wave planarity and the repeatability of the loading. The EDST and free air blast are used to<br/>generate blast loading on fully clamped square aluminium plates. The response from both loads is<br/>measured with a high-speed 3D digital image correlation (DIC) system and compared to each other. The<br/>DIC measurements are compared to strain gauge measurement for validation purposes. It is found that<br/>EDST allows to reach higher levels of pressure and impulse than the free air blast leading to higher<br/>deformations and strain rates. It is also observed that the EDST tests show a higher repeatability and<br/>symmetry relative to the free air blast tests.

Topics

• impedance spectroscopy
• aluminium