Experimental and Numerical Buckling Analysis of Delaminated Hybrid Composite Beam Structures

Abstract

Abstract. In this paper the effect of delamination position on the critical buckling load and buckling mode of hybrid composite beams is investigated. Experimental and numerical studies are carried out to determine the buckling load of delaminated composite beams. The laminated composite beams with various laminate designs of [G 90 4 were manufactured and tested to find the critical buckling load. Three different defect positions were placed through the thickness to find three main buckling modes. It was found that delamination position and lay-up can affect the buckling mode and also the critical buckling load. By approaching the delamination position to the outer surface of the specimen the buckling load decreases. The buckling process of hybrid and non-hybrid composite beams was also simulated by finite element software ANSYS and the critical buckling loads were verified with the relevant experimental results.

Robust numerical approaches for simulating the buckling response of 3D fiber-metal laminates under axial impact – Validation with experimental results

“…Esfahani et al. [13] used numerical simulation to study the effect of the through-thickness position of an initial delamination in laminated composite beams. They concluded that a delamination located closer to the surface resulted in a lower buckling capacity of the specimen.…”

Numerical and experimental study on buckling behaviour of multiple delaminated composite plates

“…Obdrzalek and Vrbka (2010) examined the buckling behavior of a small delaminated plate subjected to compression loading by means of FE analysis. Esfahani et al (2010) made experimental and numerical analysis of delaminated hybrid composite beam structures. Mohsen and Shokohi (2010) studied numerically the buckling and post buckling analysis of composite laminated structures having delaminations by using the generalized differential quadrature method.…”

Effect of Functionalized Graphene Nanoplatelets on the Delamination-Buckling and Delamination Propagation Resistance of 3D Fiber-Metal Laminates Under Different Loading Rates

“…Delamination can be initiated in FRP due to even a low-energy impact (i.e., caused by the impact of a falling tool during fabrication) and/or other manufacturing induced flaws. Esfahani et al [59] carried out a numerical study and showed that the presence of a delamination had a negative impact on the buckling capacity of their specimens, especially when the delamination was close to the specimen’s outer laminae. Kim and Hong [60] reported that the length and position of the delamination were two parameters that had a large influence on the buckling mode and post-buckling behaviour of laminated composites.…”