Effects Of Stacking Sequence on the Structural Performance of Composite Overwrapped Pressure Vessels

Abstract

Pressure vessels are subjected to stresses in axial and radial directions during their service life, which causes undesirable damages. For that reason, it is highly important to design the fiber directions in composite overwrapped pressure vessels in such a way that can carry the loads occurring in both directions. In this context, composite pressure vessels with 20 mm polar opening radii were designed and the geodesic dome profile was obtained by solving the elliptic integral. Helical and hoop winding layers were used together on the cylinder surface and the effect of stacking sequence on the structural performance was examined. In the current study, numerical models with six different stacking sequences were defined and thus stress, strain and failure indexes were determined. Furthermore, the effects of hoop winding layers on the mechanical properties were investigated by comparing with the numerical model consisting of completely helical winding layers. As a result of the current study, it has been concluded that the hoop winding layers have favorable effects on mechanical properties. It has also been observed that the utilization of the hoop winding layers provides an improvement of approximately 28% in the failure index compared to the numerical model consisting of completely helical winding. Additionally, it was observed that although the stacking sequence for the hoop winding was highly effective on the interlaminar shear stress, it did not have much effect on the stress/strain results and the failure indexes.

Comparison of mechanical properties of the Type 1 and Type 2 composite hydraulic cylinder designs: A numerical study

“…Therefore, many studies have been conducted on composite pressure vessels and pipes to improve mechanical and dynamic properties. [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] In the study conducted by Firouzsalari et al, [2] various flax fabric reinforced composite pipes were manufactured and subjected to experimental burst tests under internal pressure to determine the effect of the layer number and pipe diameter. Radial and axial strains from the pipe surfaces as well as leakage and burst pressures were obtained and the relevant results were compared.…”

Design of the composite hydraulic cylinder with geodesic dome trajectory: A numerical study

“…Moreover, it was observed that the circumferential and high‐angle helical plies in the inner layers exhibited a high sensitivity to any ply drop retraction. In the study conducted by Coskun and Sahin, [ 18 ] FEM analyses of composite overwrapped pressure vessels with six different stacking sequences were carried out, and the effects of the use of hoop winding layers on the mechanical properties were investigated. As a result, it has been found that the utilization of hoop winding layers is highly effective on the mechanical properties, especially shear stresses.…”

“…Some design parameters such as stacking sequence, [16][17][18][19] fiber material, [20] fiber orientation [21] and nanomaterial additive [22] are significantly effective on the mechanical properties of the composite overwrapped pressure vessels and composite pipes. Therefore, many studies have been carried out to determine the effect of design parameters on mechanical properties.…”

“…Therefore, many studies have been carried out to determine the effect of design parameters on mechanical properties. [16][17][18][19][20][21][22] In the study conducted by Sharma et al, [23] FEM analyses for the composite pressure vessels with six different dome shapes as hemispherical, paraboloid, ellipsoid (I), ellipsoid (II), ellipsoid (III), and isotensoid were carried out, and effects of the dome shape on the burst pressure, failure characteristics and weight performance were examined. For each dome shape, mathematical models of the thickness along the dome were created depending on the dome height.…”