Damage Detection, Localization and Assessment in Multilayered Composite Structure with Delaminations

Abstract

In this paper the dynamic behavior of composite multilayered cylindrical panel with a single, square, interlaminar delamination is considered with using finite element method. Based on numerical results it is possible to determine the effect of the delamination on the guided wave propagation in curved structures. The results are used to quantify the difference of response signal in the case of perfect and defected structures. The results indicates that the size and orientations of the defect have a significant influence on overall dynamic behavior and they should be taken into account to design appropriate and effective non-destructive damage test methods and algorithms.

Structural Health Monitoring (SHM) Methods in Machine Design and Operation

“…10), but for another one the difference is more significant (sensor s1 - Fig. 10) [63]. Such an analysis of cylindrical composite panels with a single delamination is performed by Stawiarski et al [63].…”

“…[61]. The use of the guided waves, which are governed by the same equations as bulk waves, but they have an infinite number of modes associated with propagation is currently a research field of significance in SHM as methods for damage detection in composite structures [63]. The guided waves are high sensitive to both surface and embedded structural discontinuities in a material.…”

“…Due to this fact and their multiple modes, the use of them in anisotropic media is complicated. However, they have many attractive traits, which motivate the utility of the Lamb waves: (i) active generation of controllable Lamb waves and (ii) effective signal processing and interpretation [63]. Moreover, they can propagate long distances and are used for damage detection of plate-like structures.…”

“…10) [63]. Such an analysis of cylindrical composite panels with a single delamination is performed by Stawiarski et al [63]. It is observed that the largest difference of displacements between intact and damaged structures is obtained when the sensors are placed on the edge of the defected influence zone.…”

“…Finally, the time step for dynamic calculation should be less than the ratio of the minimum distance of any two adjoining nodes to the maximum wave velocity. The exemplary 3D FEM modeling of composite multilayered cylindrical structure with a single delamination and application of damage detection method based on elastic wave-based damage identifica-tion technique for laminated composite cylindrical structures is presented by Stawiarski et al [45,62,63].…”