scholarly journals Estimated delamination of an elastic-plastic liner in a high-pressure metal composite vessel

2019 ◽  
Vol 1399 ◽  
pp. 044057
Author(s):  
Anton V Egorov
Keyword(s):  
High Pressure ◽  
Metal Composite ◽  
Elastic Plastic ◽  
Plastic Liner ◽  
Composite Vessel

Experimental study of the strength and durability of metal-composite high-pressure tanks

2019 ◽  
Vol 85 (1(I)) ◽  
pp. 49-56 ◽  
Author(s):  
A. M. Lepikhin ◽  
V. V. Moskvichev ◽  
A. E. Burov ◽  
E. V. Aniskovich ◽  
A. P. Cherniaev ◽  
...  
Keyword(s):  
High Pressure ◽  
Strain State ◽  
Full Scale ◽  
Fracture Mechanisms ◽  
Metal Composite ◽  
Test Results ◽  
Stress Strain ◽  
Pneumatic Pressure ◽  
Stress Strain State ◽  
Composite Tank

The results of unique experimental studies of the strength and service life of a metal-composite high-pressure tank are presented. The goal of the study is to analyze the fracture mechanisms and evaluate the strength characteristics of the structure. The methodology included tests of full-scale samples of the tank for durability under short-term static, long-term static and cyclic loading with internal pneumatic pressure. Generalized test results and data of visual measurements, instrumental and acoustic-emission control of deformation processes, accumulation of damages and destruction of full-scale tank samples are presented. Analysis of the strength and stiffness of the structure exposed to internal pneumatic pressure is presented. The types of limiting states of the tanks have been established experimentally. Change in the stress-strain state of the tank under cyclic and prolonged static loading is considered. Specific features of the mechanisms of destruction of a metal-composite tank are determined taking into account the role of strain of the metal liner. The calculated and experimental estimates of the energy potential of destruction and the size of the area affected upon destruction of the tank are presented. Analysis of test results showed that the tank has high strength and resource characteristics that meet the requirements of the design documentation. The results of the experiments are in good agreement with the results of numerical calculations and analysis of the stress-strain state and mechanisms of destruction of the metal-composite tank.

Stress Analysis of SS316L Tube Die Expansion for High Pressure Gas Coolers

2020 ◽  
Author(s):  
Zijian Zhao ◽  
Abdel-Hakim Bouzid
Keyword(s):  
Residual Stress ◽  
High Pressure ◽  
Plastic Material ◽  
Research Work ◽  
Material Behavior ◽  
Isotropic Hardening ◽  
Plastic Behavior ◽  
Expansion Process ◽  
Elastic Plastic ◽  
Stress States

Abstract SS316L finned tubes are becoming very popular in high-pressure gas exchangers and particularly in CO2 cooler applications. Due to the high-pressure requirement during operation, these tubes require an accurate residual stress evaluation during the expansion process. Indeed, die expansion of SS tubes creates not only high stresses when combined with operation stresses but also micro-cracks during expansion when the expansion process is not very well controlled. This research work aims at studying the elastic-plastic behavior and estimating the residual stress states by modeling the die expansion process. The stresses and deformations of the joint are analyzed numerically using the finite element method. The expansion and contraction process is modeled considering elastic-plastic material behavior for different die sizes. The maximum longitudinal, tangential and contact stresses are evaluated to verify the critical stress state of the joint during the expansion process. The importance of the material behavior in evaluating the residual stresses using kinematic and isotropic hardening is addressed.

3135 Optimum Design of FRP Vessel with Plastic Liner for High Pressure Hydrogen Gas

2007 ◽  
Vol 2007.6 (0) ◽  
pp. 329-330
Author(s):  
Kohta HARIYA ◽  
Sergey DMITRIEV ◽  
Nobuhiro YOSHIKAWA
Keyword(s):  
High Pressure ◽  
Optimum Design ◽  
Hydrogen Gas ◽  
Plastic Liner ◽  
Pressure Hydrogen

Fabrication of Glass-Metal Composite Micro/Nanonozzles

2008 ◽  
Author(s):  
Nisarga N. Naik ◽  
Mark G. Allen
Keyword(s):  
High Pressure ◽  
High Strength ◽  
Point Of View ◽  
Smooth Transition ◽  
Temperature Control System ◽  
Working Fluid ◽  
Metal Composite ◽  
Fabrication Technique ◽  
Stress Point ◽  
Glass Metal

This paper reports a fabrication technique for high strength glass-metal composite micro/nanonozzles with orifice diameters ranging from 430 nm to >100 μm. Unlike the conventional methods used to build micro/nanonozzles, the fabrication technique discussed in this paper is a non-lithographic approach. It uses conventional pulled borosilicate micropipettes as a foundation and nickel as a strengthening layer to build high pressure withstanding micro/nanonozzles. Pipettes built using the pulling process offer a smooth transition to the fluid from the reservoir to the tapered part of the nozzle, providing an ideal geometry from fluid flow and stress point of view. The nozzles are tested for high pressure withstanding capacity by integrating them with a high pressure fluidic setup to drive microjets. As an example, a 1.5 μm diameter nozzle, tested with propane as the working fluid to drive a microjet is observed to withstand pressures upto 10.5 MPa. Apart from simplicity of the fabrication process, this approach also offers the ability to incorporate a wireless temperature control system for the nozzles.

State-of-the-art production processes for convoluted, corrosion-resistant, high-pressure oilfield pipework

2005 ◽  
Vol 219 (4) ◽  
pp. 345-355 ◽  
Author(s):  
G. J. Collie ◽  
I Black
Keyword(s):  
High Pressure ◽  
Shape Memory Polymer ◽  
Hot Isostatic Pressing ◽  
Current Application ◽  
Corrosion Resistant ◽  
Piping Systems ◽  
Corrosion Resistant Alloy ◽  
Plastic Liner ◽  
Welded Pipe ◽  
Hot Rolled

Currently, there are two widely used methods for manufacturing corrosion-resistant, high-pressure pipework for oilfield applications: fabrication of the pipework from several, separate overlaid components joined by welding, or by combining fabrication and induction bending. The former is expensive and time consuming. The latter is less expensive but there are restrictions on the bend radii that can be achieved. This paper considers a range of possible alternatives in the production of complex, corrosionresistant, high-pressure piping systems for oilfield equipment. Some of the options (hot-rolled and seam-welded pipe, explosion-bonded and seam-welded pipe, and bi-metallic extrusions) result in an end product that is broadly comparable with that produced by fabrication. Others (epoxy coating, shape memory polymer, preformed plastic liner, cured-in-place plastic liner, and liquid coating) do not provide a metallic coating but are used in similar applications in different industries. Finally, there are technologies (such as plating, hot isostatic pressing, ceramic lining, and vapour deposition) that are proven processes but have no current application that may be considered directly relevant to high-pressure piping systems. One new concept under development by the authors is introduced - the use of a thin-walled liner manufactured from a corrosion resistant alloy, and expanded into a prebent carbon steel pipe.

scholarly journals Axial force effect on the buckling of a constrained cylindrical shell

2019 ◽  
Author(s):  
A.V. Egorov ◽  
V.N. Egorov
Keyword(s):  
High Pressure ◽  
Cylindrical Shell ◽  
Axial Force ◽  
Composite Shell ◽  
Local Buckling ◽  
Front Surface ◽  
Cylindrical Part ◽  
Pressure Vessels ◽  
Metal Composite ◽  
Axial Forces

The article considers a constrained cylindrical shell structure. It is a two-ply cylinder in which the inner metal shell (liner) contacts on the outer front surface with a composite shell formed by wound carbon-fibre tape. The design model of this structure is used, among other things, for metal composite cylindrical high pressure vessels. When such vessels are in use, there is a danger of liner delamination from a rigid composite shell, which refers to prohibitive defects. The deformation of the liner in the central part of the vessel occurs under the influence of internal pressure applied to both the cylindrical part and to the bottoms from which axial forces appear. The present work is aimed at studying the effect of these axial forces on the local buckling of the liner in the cylindrical zone of the vessel. The model of the structure deformation includes technological deviations characteristic of real products and a 3D stress-strain state, changing in real time. The calculation was carried out in the LS-DYNA software package in a dynamic formulation using 3D solid elements. For the target level of pressure, the moments of delamination of the vessel and the buckling of the liner are determined. A comparison of two design schemes (i) with and (ii) without axial force taken into consideration is carried out. The necessity of taking into account axial forces when designing metal composite high pressure vessels is shown.

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