论文信息 - INTEGRATION OF GOVERNING DIFFERENTIAL EQUATIONS OF CONTINUUM MECHANICS WITH SCANNING LASER VIBROMETRY TECHNOLOGY FOR MONITORING OF STRUCTURAL DAMAGE

INTEGRATION OF GOVERNING DIFFERENTIAL EQUATIONS OF CONTINUUM MECHANICS WITH SCANNING LASER VIBROMETRY TECHNOLOGY FOR MONITORING OF STRUCTURAL DAMAGE

This paper discusses an algorithm based on the fundamental principles of continuum mechanics (viz. strain compatibility and conditions of equilibrium) in identifying delamination in composite beams. Using a 3D scanning laser vibrometer, the out-of-plane deflections of a composite panel can be measured. Utilising a Savitzky-Golay filter and the out-of-plane deflections, the algorithm is able to determine violations of the fundamental principles and therefore, indicating damage such as a void, crack or delamination. An experimental investigation was conducted utilising the algorithm for the detection of delamination in a composite beam and was verified with simulation.

Stuart J. WILDY | Hannah WEISBECKER | Ben CAZZOLATO | Andrei G. KOTOUSOV

[1] M. Cao,et al. Novel Laplacian scheme and multiresolution modal curvatures for structural damage identification , 2009 .

[2] P. A. Gorry. General least-squares smoothing and differentiation by the convolution (Savitzky-Golay) method , 1990 .

[3] S. S. Law,et al. Damage localization in plate structures from uniform load surface curvature , 2004 .

[4] Andrei Kotousov,et al. Scanning laser vibrometer for non-contact three-dimensional displacement and strain measurements , 2008 .

[5] Andrei Kotousov,et al. A new passive defect detection technique based on the principle of strain compatibility , 2008 .

[6] Pizhong Qiao,et al. A Combined Static/Dynamic Technique for Damage Detection of Laminated Composite Plates , 2008 .