Experimental Study on Hoop Stress Affecting Braided Carbon Fiber Reinforced Plastics Subjected to Internal Pressure

Abstract

Braided carbon fiber reinforced plastics (CFRPs) can be employed in the construction of pressurized vessels to increase performance and reduce overall weight. However, owing to the complex braiding structures resulting from the braiding process, an analysis of the elastic modulus is important as it affects the hoop stress on the pressure vessel. In this study, braided preformed CFRP constructed on a steel cylinder subjected to internal pressure was experimentally investigated using a simple approach that involved estimating the elastic modulus and hoop stress. Five types of braided preformed CFRP with different braiding angles and number of applied layers were analyzed. The elastic modulus and hoop stress can be estimated from these measurements of the internal pressure. The differences in the braided structures result in different strain values and affect the elastic modulus. High braiding angles tend to be more stable against high internal pressure, and exhibit small strain differences and high elastic modulus in the hoop direction. Similar results were observed when additional layers were applied. Increasing the braiding angle and the number of layers can increase the average elastic modulus.

Experimental Investigation on Vibration Responses of Fiberglass Reinforced Plastic

“…Fiber serves to strengthen the matrix because the elastic modulus of fiberglass is higher than polyester resin. The addition of volume up to 48 fiberglass caused the stiffness of the composite to increase, according to the mixed rule, adding reinforcement (fibers) can increase the elastic modulus of the composite [12], [8].…”

“…Several studies have examined vibration levels to detect damage to a system or engine component [5], [6], [7]. Other studies have examined the characteristics of composite materials where the structure of the material and the volume fraction of the material affect its mechanical properties [8], [9]. Meanwhile, research on cantilever beams has been investigated including the analysis of the effect of composite structures on fiber-reinforced cantilever beams on vibration characteristics [10], [11].…”

Analysis of The Number of Layers and Types of Carbon Fiber Against Tensile Strength, Compressing Strength and Shock Load of Bicycle Frame

“…Literature Review [5] investigated the effect of laminated composite laminate with e-glass fibre and carbon fibre reinforcement on tensile strength with a polyester matrix. The problem discussed in this research is to determine the properties of the laminated composite material reinforced with e-glass fibre and carbon fibre with a polyester matrix.…”