Structural health monitoring techniques for detecting incipient buckling

Kassahun Asamene; Bashir Ali; Mannur Sundaresan

doi:10.1117/12.847808

8 April 2010 Structural health monitoring techniques for detecting incipient buckling

Kassahun Asamene, Bashir Ali, Mannur Sundaresan

Proceedings Volume 7649, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2010; 764910 (2010) https://doi.org/10.1117/12.847808
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2010, San Diego, California, United States

Abstract

Among different failure modes observed in structures, loss of stability due to buckling is a major concern. Buckling may be induced because of overload or as a consequence of other types of failures in the structure. This paper examines two techniques, namely, vibration based analysis, and stress wave propagation analysis for detecting this onset of instability. The responses of a bar and a plate are used to illustrate the effectiveness of the two approaches. These analyses were performed through finite element simulations and limited experiments. Changes in vibration frequencies and mode shapes are found to provide good indications of the impending failure as well as its progress. Changes in the wave propagation characteristics showed some limited success in detecting the incipient buckling.

Citation Download Citation

Kassahun Asamene, Bashir Ali, and Mannur Sundaresan "Structural health monitoring techniques for detecting incipient buckling", Proc. SPIE 7649, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2010, 764910 (8 April 2010); https://doi.org/10.1117/12.847808

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