Development of a new generation of filament wound composite pressure cylinders (original) (raw)
Related papers
Design and Finite Element analysis of Thick walled Laminated Composite Pressure Vessel
International Journal of Innovative Technology and Exploring Engineering, 2019
Composite materials in general offer a high potential for manufacturing of structures with featuring an interesting mechanical performance, mainly with regards to specific stiffness, specific strength, damage tolerance and energy absorption capability. In current analysis, glass fibre reinforced in epoxy resin to form a laminated composite walled pressure vessel(filament winding) is considered for design. The purpose of this work is primarily to perform finite element analysis (FEA) of a composite walled pressure vessel (CPV) under different loads. Different design stresses and strains are evaluated using Lame’s equation. These outcomes are tabulated and examined with the results of the steel walled pressure vessel used for LPG. It is foundthat CPV is a suitable vessel for LPG storage and it can be replaced current LPG steel walled vessel to CPV.
Design of fiber-reinforced composite pressure vessels under various loading conditions
Composite Structures, 2002
An analytical procedure is developed to design and predict the behavior of fiber reinforced composite pressure vessels. The classical lamination theory and generalized plane strain model is used in the formulation of the elasticity problem. Internal pressure, axial force and body force due to rotation in addition to temperature and moisture variation throughout the body are considered. Some 3D failure theories are applied to obtain the optimum values for the winding angle, burst pressure, maximum axial force and the maximum angular speed of the pressure vessel. These parameters are also investigated considering hygrothermal effects.
Material Modelling and Failure Study of Different Fiber Reinforced Composites for Pressure Vessel
Memoria Investigaciones en Ingenieria N24, 2023
Pressure vessels are essential industrial tools regarding storage of high-pressure fluids. Utilization of pressure vessels in ordinary industrial environment impose serious dangers to human life in case of failure. Manufacturing material and working pressure as per material’s strength are necessary arguments for a pressure vessel designer. In this study, five composite materials are selected to investigate the behavior of pressure vessels under high pressure. FEA technique is used to check stresses and deformations in different composite layers. Pressure applied to all materials models in this study is around 20 MPa. Tsai Wu and Maximum stress theories are used to study failure in first two composite layers of different composite materials. Glass Epoxy composites perform well in terms of static loading failure. They demonstrate reasonable strength without experiencing failure in the second layer. T300/976 composites are also suitable for the intended loading conditions of the model because did not exhibit second layer failure, making them a viable option. Therefore, it is recommended to use Glass/Epoxy and T300/976 composites in extreme pressure conditions such as those found in CNG cylinders. Three of the composite materials tested did not satisfy the failure theories. Hence, it is not safe to use them in extreme loading conditions. Although these materials did not show any failure in the first layer, deformations in the second layer made them susceptible to failure.
Structural Performance of Unstiffened Laminated Composite Pressure Vessels
The use of composite materials improves the performance of the vessel and offers a significant amount of material savings. In this paper buckling analysis of woven fiber reinforced multi layered composite shell under pure internal pressure is conducted and its structural performance is studied. The thickness of pressure vessel is kept constant and number of layers and angle of orientation of each layer is altered. Three composites are considered for the study namely carbon/epoxy, E-glass/ epoxy and S-glass/ epoxy for the tank body. After static and buckling analysis of unstiffened pressure vessels it is concluded that carbon/epoxy laminated composite pressure vessel with 15 numbers of layers at 90° orientation has shown the best performance.
Among these ages, the one of current importance and future dominance is the age of composites and Nano-Materials. Manual layup method for FRP reinforcement is very old and traditional method. There is no other way to make fibre and epoxy resin and hardener coated surface on the steel tank, inside or outside for strength and corrosion free. The same time the detailed study of present manual hand layup winding of Filament activity indicates that the process suffers from various draw back like lack of accuracy which results in cracks, weak structure and instability in surface and round cylinders, low production rate E-Glass fibre is one of the essential elements of reinforced Plastics with epoxy resin in aerospace, Pipe industries, Pressure vessel and Marin Industries. These Fibre roving and their reinforcement are used for strengthening pressure vessel, cylinder of thick and thin structure for increase life and trouble free maintenance. In order to remove above drawbacks and formulate an approximate experimental data based model by using E-Glass fibre, Epoxy resin, and hardener for Filament winding activity. Design of experimental work is executed for establishing, formulation of experimental mathematical model for processing time, Density, fibre volume fraction, weight of shell, and Ultimate tensile strength of FRP Shell by obtaining specified result with Filament winding. Experimentation data is chosen, using methodology of engineering experimentation for CNC filament winding machine. This research also includes the design, fabrication and Mass Production of Pressure vessel with Filament winding along with theory of experimentation. It also includes formulation of mathematical model and its sensitivity analysis, reliability, optimization and limiting values and ANN. Out of which process for formulation of mathematical model established. Field Data collected from Vendors and In-house for a prediction model was then developed to predict effect of parameters. The basic steps used in generating the model adopted in the development of the prediction model are: collection of experimental data; analysis of data, pre-processing and feature extraction of the data, design of the prediction model, training of the model and finally testing the model to validate the results and its ability to predict Filament winding operation. This research work presents an experimental investigations and sequential classical experimentation technique used to perform experiments for various independent parameters. An attempt is made to optimize the process parameters for processing time, Density, fibre volume fraction, weight of shell, and Ultimate tensile strength. The test results proved processing time, Density, fibre volume fraction, weight of shell, and Ultimate tensile strength are significantly influenced by changing important five dimensionless π terms.
Global Journal of Researches in Engineering:
In this present study the post buckling cha-racteristics of moderately thick-walled filament-wound carbon–epoxy composite cylinders under external hydrostatic pressure were investigated through finite element analysis for under water vehicle applications. The winding angles were [±30/90] FW, [±45/90] FW and [±60/90] FW. Finite element software ANSYS 14.0 were used to predicted the buckling pressure of filament-wound composite cylinders. For the finite element modeling of a composite cylinder, an eight-node shell element is used. To verify the finite element results for comparison, three finite element software, MSC/NASTRAN, MSC/MARC and an in-house program ACOS were used. Among these software’s, the finite element software ANSYS predicts the buckling loads within 1.5% deviation. The analysis and test results showed that the cylinders do not recover the initial buckling pressure after buckling and that this leads directly to the collapse. Major failure modes in the analysis were dominated by the helical winding angles. The finite element analysis shows global buckling modes with four waves in the hoop direction.
Bursting problem of filament wound composite pressure vessels
International Journal of Pressure Vessels and Piping, 1999
Using the nonlinear finite element method, we have calculated the stresses and the bursting pressure of filament wound solid-rocket motor cases which are a kind of composite pressure vessel. Maximum stress failure criteria and a stiffness-degradation model were introduced to the failure analysis. The effects of material performance and geometrical nonlinearity on the relative loading capacity of the dome were studied. For the model I case with skirts, relative loading capacity of the dome increased when geometrical nonlinearity was considered and composite material of higher strength was used. But for the model II case without skirts, the conclusion obtained was contrary to that for the model I case. ᭧
Composite Pressure Vessels in Petroleum Industry: Status and Outlook
The use of composite pressure vessels in petroleum industry is one of the major areas of application of such vessels, particularly for storage and transportation of fuels. Existing studies related to this field have considered various types, designs and applications of composite pressure vessels. The current state of the art composite pressure vessels are light, safe, but unfortunately rather expensive compared to steel vessels. This is one of the main reasons why a broad introduction of composite vessels for liquefied petroleum gas (LPG) storage and transportation has not taken place yet. In this work the current status of composite pressure vessels in the petroleum industry is highlighted. Various existing models and studies of composite pressure vessels are discussed. Potential for application in the area of composite LPG cylinders is discussed.
Experimental and numerical analysis of a LLDPE/HDPE liner for a composite pressure vessel
Polymer Testing, 2011
This work investigates the behavior under burst pressure testing of a pressure vessel liner. The liner was produced with a polymer blend of 95 wt.% low linear density polyethylene (LLDPE) and 5 wt.% of high density polyethylene (HDPE). The liner is to be used in an allcomposite carbon/epoxy compressed natural gas (CNG) shell, manufactured by the filament winding process, with variable composite thickness. Experimental hydrostatic tests were conducted on reduced scale and actual liner models. Design and failure prediction of the composite laminate shell and the polymeric liner were conducted based on Tsai-Wu and von Mises criteria, respectively, using commercial Finite Element Analysis (FEA) software. Simulation and testing were both important in order to define adequate production parameters for the polymeric liner so that it could be successfully used in a composite pressure vessel.