A probabilistic approach for quantitative identification of multiple delaminations in laminated composite beams using guided waves

A zigzag model for laminated composite beams

In the present work, a zigzag model for symmetric laminated beam is developed. This model uses a sine term to represent the nonlinear displacement field across the thickness as compared to a third order polynomial term in conventional theories. Transverse shear stress and strain are represented by a cosine term as compared to parabolic term. This model satisfies displacement and transverse shea...

Locating Delamination in Composite Laminated Beams Using the Zero-Order Mode of Lamb Waves

Damage Identification in Composite Panels Using Guided Waves

A methodology for the identification of barely visible impact damage using guided waves on a typical aircraft composite structure is implemented. Delaminations and debondings have been introduced in two stiffened panels by means of impact loads. arious different impact locations were selected to assess the performance of the identification methods for different conditions. The two structures we...

The interaction of Rayleigh waves with delaminations in composite laminates.

In the present work, the interaction of Rayleigh waves with a delamination in a fiber reinforced composite plate was analyzed. Rayleigh waves, upon interacting with delamination mode, convert into Lamb waves in the delamination zone. These guided Lamb modes have the capability to mode convert back into Rayleigh modes when they interact with the edge of the delamination. A unidirectional glass/e...

Method of Initial Functions for Composite Laminated Beams

In this paper method of initial functions is used for the study of composite laminated beams. The distribution of bending and shear stresses in composite laminated beams are different from beams of small thickness. The equations of two dimensional elasticity have been used for deriving governing equations. The order of the derived equations depends on the stage at which the series representing ...