Pressure vessel is a container used to store fluids under pressure and temperature. The fluids can be air, water, chemicals, fuel, gases etc. are most commonly used in food and chemical industries, oil refineries and so on. Pressure vessel is subjected to thermal and structural loads for power plant applications. Since the pressure vessel are subjected to both structural and thermal loads stresses, the design of pressure vessel was done using standard code and design methods. In this paper a design methodology is developed for pressure vessel used in Coker Blow-down application based on ASME Section VIII, Division 1 design code. The design methodology has been developed and the same is verified with numerical method so that it will not fail in case of variable pressure and temperature condition. The modelling has been done using SolidWorks-2015 and analysis is done using ANSYS.

This paper, firstly, investigates the behavior of a pressure vessel designed based on the netting analysis method. Then, the strain measurement result performed to examine the behavior of the vessel is presented. It has been observed that the reverse strain is occurred at the joint of the vessel cylindrical area and its head. To inspect the experimental data, the ABAQUS software (finite element) was deployed. The simulation results turned out to be in good consistency with the experimental data. Later, to design the vessel, Von Mises and Tsai Wu criterion were used for liner and composite layers, respectively. The design results showed that the ne tting analysis method is not optimal and leads to increase in the cost and weight of the vessel. In addition, investigating the vessel behavior indicated that using softer liner results in more exploit of the composite properties which in turn, can bring b etter performance in special applications. The good consistency between the experimental and simulation results proved that the complexity involved in the design of pressure metal composite vessels can be greatly reduced through employing finite element si mulation methods.

In this paper, the implementation of an interface element to model the contact between the core and the layer in thermoelastic contact analysis of monolayer pressure vessels is presented. How to couple the elements of the core and the layer and implementation of the boundary conditions are also described. The source of heat could be due to temperature difference in the layers in practice or the heat due to welding in the concentrated welding zone of the layer during the assemblage of the layer and the core of the pressure vessel. Thermoelastic contact between the core and layer has come under investigation. It is concluded that the methodology with the special employment of interface elements in joints and contact regions is efficient for analysis of joints and contact problems in the analysis of layered media.

The focus of this article is on analyzing the behavior of pressure vessels by acoustic emission testing (AT) and assessment of the ability of experimental methods in detection of cylinder defects by measurement of strain on FRP composite tanks. To perform the experiments, the set-up is prepared by installing acoustic emission sensors and strain gauges on the composite tank. Then, the data is collected from acoustic emission sensors and strain gauges. It was observed that the composite tank was in the safe range at pressures less than 2 bar and holes up to diameters of 2-mm diameter did not lead to plastic deformation and development of defects. Under other operating conditions, no monitoring is necessary up to pressures of 5 bar or less where the strain dies bit act linearly any more. At higher pressures, it is necessary that other failure mechanisms, such as elastic-plastic deformation, cracking, etc to be monitored. It is concluded that the acoustic signals are mostly produced by failure mechanisms. The acoustic emission signals for a non-defective cylinder are much less than a defective cylinder. The signals usually start to show up when at the incipiation of a leakage.

In this research, the analytical and numerical investigation of a cylindrical shell made of functionally graded materials (FGMs) reinforced by laminated composite subjected to internal pressure is presented. Using the infinitesimal theory of elasticity, the analytical solution of stress and strain in vessels made of FGMs is studied first. It is assumed that the elasticity modulus follows a power law distribution in the thickness direction and Poisson's ratio considered to be constant for simplicity. The results of the finite element method using ABAQUS software for in-homogeneity constant b in the range of -2 to 2 have been compared with the analytical results. The comparison represents good coincidence between analytical and numerical results and confirms the accuracy of stress and strain solutions presented for vessel made of FGMs. The stress and strain solutions in laminated composite vessels are then investigated. Finally, modeling of FGM vessel reinforced by composite laminates with different lay-up is taken into consideration. The obtained results demonstrate that in the cylindrical shell reinforced by laminated composites, the maximum stress is considerably less than the maximum stress in the pressure vessels made of just composites or FGMs.