Numerical analysis of the effect of fiber orientation on hydrostatic buckling behavior of fiber metal composite cylinder

Abstract

The external hydrostatic buckling behavior of fiber metal laminate (FML) composite cylinders was investigated numerically. The critical buckling pressure predicted by eigenvalue analysis was compared with experimental results. The numerical results showed different modes of buckling and buckling deformation for cylinders of different fiber orientation when subjected to external hydrostatic loading. FML cylinder with 0 /90 fiber orientation exhibited higher buckling strength and lower buckling deformation as compared to FML cylinders of 60 /30 , AE45 , and AE55 fiber orientations. The orientation of fiber has significant influence on the performance of FML composite cylinder as compared to fiberreinforced plastic thickness. The correlation between numerical and experimental results is discussed in terms of buckling strength, circumferential stiffness, and buckling deformations. It was observed that the cylinders were less sensitive to initial imperfections irrespective of fiber-reinforced plastic thickness. In addition, the results of finite element analysis and experimental results indicate good matches.

A Review on Structural Failure of Composite Pressure Hulls in Deep Sea

“…It is indicated that using the liner may have some reinforcement effect compared to the pure composite shell. Sumana et al [48] conducted an experimental and numerical comparative study on the buckling of composite cylindrical shells with aluminum liner under external pressure, and found that the cylindrical shells with winding angle of 0 • /90 • have higher buckling strength and lower buckling deformation than those with winding angle of 60 • /30 • , ±45 • and ±55 • . Zuo, Zhang and others [49] carried out a comparative study on steel and steel-composite cylinders under external pressure; three nominally identical steel-composite cylinders and three nominally identical steel ones were tested under uniform external pressure.…”

New Advances and Future Possibilities in Forming Technology of Hybrid Metal–Polymer Composites Used in Aerospace Applications

“…Recently, these forming methods were utilised to form steel-based FMLs, but the latest research papers have been focused mainly on aluminium-based composites. Researchers consider the configuration of the material layers [374][375][376][377] or the process parameter setup [86,[378][379][380][381][382][383][384][385][386] to reduce material defects and go beyond the current forming limits caused mainly by breakage and wrinkling. In order to improve the formability of the layers of FRP, many studies are focused on die forming at elevated temperatures [387][388][389].…”

“…Elements made using this method have superior surface quality and dimensional accuracy. The main obstacle preventing the popularisation of this method is the high cost of the machines and the process, compared with conventional stamping [375]. Fibre orientation has a significant impact on FML performance; Sumana et al [375] produced hydroformed cylindrically shaped FMLs made of 1 mm thick 6061-T6 aluminium alloy and three alternative FRP thicknesses: 1 mm, 2 mm, and 3 mm.…”

“…The main obstacle preventing the popularisation of this method is the high cost of the machines and the process, compared with conventional stamping [375]. Fibre orientation has a significant impact on FML performance; Sumana et al [375] produced hydroformed cylindrically shaped FMLs made of 1 mm thick 6061-T6 aluminium alloy and three alternative FRP thicknesses: 1 mm, 2 mm, and 3 mm. The lowest buckling deformation and highest buckling strength were observed during hydroforming of a cylinder shape consisting of 0/90 • woven fibre, and 60/30 • , ±45 • , and ±55 • fibre orientation samples.…”

Numerical‐experimental structural instability analysis of composite tubes considering manufacturing parameters and imperfections

“…The most relevant uncertainties were those related to longitudinal modulus and thickness. Sumana et al [ 6 ] performed finite element instability analysis in composite tubes with a metallic liner (D/t ratios of ca. 40, 26, and 20) and reported up to 9% deviations in relation to experiments.…”