Effect of seawater on the buckling behavior of hybrid composite plates

Abstract

This paper addresses the effects of different stacking sequences and seawater on the buckling behavior of hybrid composite plates. For the buckling tests, 12-layered hybrid composite plates were produced using different combinations of carbon, E-glass and aramid fibers, with an epoxy resin system as the matrix (Araldite LY1564/Aradur 3486). The hybrid composite plates were designed at the symmetric orientation angles of [(0/90)3]s, [(30/−60)3]s, [(45/−45)3]s and an anti-symmetric orientation angle of [(0/90)3]2. The hybrid composite samples were divided into groups and were subjected to buckling tests after being kept in different settings for varying periods of time (room temperature for 90 days, Black Sea water for 90 days, Mediterranean Sea water for 90 days, Mediterranean Sea water for 150 days). In light of the data obtained from the tests, the buckling behaviors of the layered hybrid composite plates were examined. The highest critical buckling load occurred in the carbon/aramid/glass (CAG) hybrid samples with the stacking sequence of [(0/90)3]s, whereas the lowest critical buckling load occurred in the carbon/aramid/glass (CAG45) hybrid samples with the stacking sequence of [(45/−45)3]s. It was observed that the critical buckling loads of the samples immersed in seawater decreased when compared to the critical buckling loads of the samples kept at room temperature. It was also found that the critical buckling loads of the hybrid samples immersed in the Mediterranean Sea water, which has high salinity, were lower than the critical buckling loads of the hybrid samples immersed in the Black Sea water, which has lower salinity.

Evaluation of the hydrothermal aging effect on the buckling behavior of hybrid glass/aramid/epoxy composite plates: Comparison of distilled water and seawater

“…Security and steady engineering structures are necessary and constituent to maintain the durability of the structures. Hence, researches are continually rising to improve the mechanical properties with the goal to prevent failures from extreme loading 1–3 and severe environmental conditions. Polymer matrix composites have assumed great significance in the developing outdoor and marine industry as replacements for metal alloys because of high strength/stiffness to weight ratios, corrosive resistance 4,5 …”

“…Buckling can be defined as an unexpected failure of a structural component exposed to compressive loads, where the amount of compressive stress at the failure is smaller than the ultimate compressive stress amount that material can withstand 1,6 . Many studies have been applied on the buckling properties of composites under the headings such as hybridization effect, 7–14 particle reinforcement, 15,16 cut out, and geometry effect 17–21 …”

“…Öndürücü and Kayıran 1 performed the buckling properties of hybrid glass, carbon, and aramid composited aged in seawater. In this study, plates were designed at symmetric and antisymmetric orientations with carbon, glass, and aramid fabrics.…”

“…Öndürücü and Kayıran 1 assessed the buckling properties of hybrid composites kept in cold conditions. Hybrid composite samples with different combinations were kept at −18°C for 90 and 150 days.…”

The effect of cold environment on the buckling behavior of hybrid composites prepared by using carbon/aramid/glass

“…Yeter et al, 16 the fiber orientation angle was found to have a significant effect on the buckling loads of composite plates, with the minimum buckling load reported at an angle of 45°. Öndürücü and Kayıran 17 carried out an experimental study into the effect of seawater on the buckling behavior of hybrid composite materials and found that specimens kept in seawater had lower P cr s than those kept under room conditions. The authors also reported that hybrid composite specimens kept in seawater from the Mediterranean Sea, which has a higher salt content, had lower P cr s than those kept in seawater from the Black Sea.…”