Numerical modeling of dynamics of sandwich plates with partially debonded skin- to- core interface for damage detection
Referat wygłoszony
| Status: | |
| Autorzy: | Burlayenko Vyacheslav N., Sadowski Tomasz |
| Rok wydania: | 2011 |
| URL do źródła | LINK |
| Język: | angielski |
| Źródło: | EURODYN 2011, 8th International Conference on Structural Dynamics, Leuven, Belgium, 4-6 July 2011 |
| Miasto wystąpienia: | Leuven |
| Państwo wystąpienia: | POLSKA |
| Efekt badań statutowych | NIE |
| Abstrakty: | angielski |
| The online detection of damage in composite materials has nowadays a strong need in developing the safe, reliable and effective methods to discover initial damage. Vibration-based model-dependent methods offer a promising option to fulfill such requirements. This paper presents a study on dynamics of composite sandwich plates containing partial damage at the skin-to-core interface, known as debonding. Damage-induced variations of dynamic parameters are numerically investigated and are analyzed from the damage detection viewpoint. The finite element method (FEM) is used to compute both the modal parameters such as natural frequencies and mode shapes, and structural time history dynamic responses of sandwich plates with or without damage. Debonding within sandwich plates is estimated by comparing dynamic responses between their damaged and intact configurations. FEM models corresponding to both the modal and general dynamic analyses are developed within the ABAQUS code. Fast Fourier Transform is used for decomposition of structural dynamic responses in order to highlight the features of damaged plates. The mechanism of the contact-impact behavior of detached interfaces in the vibrating sandwich plate is examined. The non-linear effect of this phenomenon is estimated and its influence on the time history parameters has also been investigated. Numerical findings obtained in this study are discussed in the context to establish a guideline for damage identification in composite sandwich structures. |
