Showing papers by "Rüdiger Schmidt published in 2020"

Vibration-based damage diagnosis of composite sandwich panels with bi-directional corrugated lattice cores

Abstract: In this paper we design and fabricate a series of carbon fibre composite bi-directional corrugated sandwich panels (BCSPs) with and without defects. A modified damage index (MDI) based on modal flexibility curvature variation (MFCV) is proposed to identify the damage location of composite BCSPs numerically. A good agreement of natural frequencies and modal shapes is obtained between the numerical and the experimental results, which demonstrates that the adopted numerical models are reliable for the present structures. Results show that the proposed MDI method can accurately detect almost all of damages and effectively eliminate the influence of false peaks as much as possible, which demonstrate the present MDI method is better than the DI method for the damage location of the present structures, which could be useful for the non-destructive evaluation (NDE) of such kinds of composite sandwich structures.

Modal response and vibration attenuation of carbon fiber composite sandwich cylindrical panels made of bi-directional corrugated strip cores

Abstract: To explore desirable structures with both higher fundamental frequency and better vibration suppression, we designed and fabricated carbon fiber composite bi-directional corrugated sandwich cylindr...