High Speed Photography of Moire Fringes. Application to Ceramics Under Impact

T. Bertin-Mourot , C. Denoual , G. Deshors , P. Louvigné , T. Thomas

A high speed moiré photography system has been developed for measuring dynamic 2-D strain fields. The method is illustrated by an impact onto tiles of Silicon Carbide to display the history of the strain field. The steel blunt cylinder projectile is fired by a gas gun at a speed of 330 m/s. A checked grating with 28 lines/mm was reproduced on the target lateral surface using aluminum. The moiré fringes are recorded during impact by a high speed camera. Sequences of fringe patterns are analyzed by a 2-D Fourier Transform method to obtain the strain fields.

Domaines: Articles anciens

T. Bertin-Mourot, C. Denoual, G. Deshors, P. Louvigné, T. Thomas. High Speed Photography of Moire Fringes. Application to Ceramics Under Impact. Journal de Physique IV Proceedings, 1997, 07 (C3), pp.C3-311-C3-316. ⟨10.1051/jp4:1997355⟩. ⟨jpa-00255512⟩