The Fatigue Analysis of Pressure Vessels Based on Workbench

2012 ◽  
Vol 550-553 ◽  
pp. 3082-3087
Author(s):  
Xing Ye Su ◽  
Qin Li ◽  
Hong Mei Wang
Keyword(s):  
Fatigue Failure ◽  
Chemical Industry ◽  
Pressure Vessel ◽  
Petrochemical Industry ◽  
Rapid Development ◽  
Fatigue Analysis ◽  
Pressure Vessels ◽  
Operation Condition ◽  
Key Steps

With the rapid development of petrochemical industry, the operation condition of pressure vessels under the alternating load was increasing and the probability of fatigue failure was also on the rise. As a result, pressure vessel fatigue analysis is gaining the designer's attention. This paper describes the key steps and techniques of the fatigue analysis of pressure vessel based on Workbench platform using the lock hopper of the coal chemical industry as an example.

Analysis of Pressure Vessel Manufacturing Technology Development

2010 ◽  
Vol 42 ◽  
pp. 160-165
Author(s):  
Ping Chen ◽  
Jian Ma
Keyword(s):  
Pressure Vessel ◽  
Industrial Production ◽  
Technology Development ◽  
Structural Characteristics ◽  
Steel Strip ◽  
Rapid Development ◽  
Pressure Vessels ◽  
Bearing Load ◽  
Pressure Cylinder ◽  
Bearing Loads

With the rapid development of modern industry, pressure vessel technology has been widely applied in research and industrial production, and some of pressure vessels have been required under more harsh applied conditions such as severe bearing loads and large-sizes, making higher demands on the manufacturing and security for them. This paper outlines the various pressure cylinder structures that have emerged in history and their evolution processes, and proposes a reasonable interlocking steel strip wound cylinder and analyses its structural characteristics. It can not only resolve the issue of the axial bearing load of the winding cylinder well but also be manufactured economically

An Example of Bolted Joints in Pressure Vessels Under Fatigue Conditions

2007 ◽  
Author(s):  
I. Le May ◽  
R. Pascual
Keyword(s):  
Cyclic Loading ◽  
Fatigue Failure ◽  
Pressure Vessel ◽  
Pressure Vessels ◽  
Bolted Joints ◽  
Loading Conditions ◽  
Bending Stresses ◽  
Bolted Flange ◽  
Concentric Loading ◽  
Excellent Tool

Flanges in pressure vessels are, in most cases, submitted to non-concentric loading conditions producing bending stresses in the bolts that have to be taken into account for design purposes. The VDI 2230 Guideline [5] provides an excellent tool for the design of bolted joints, especially those in which the bolts are eccentrically loaded, as is commonly the case in pressure vessels. When cyclic loading conditions that can lead to fatigue failure are prevalent, special attention should be paid to the fatigue criteria used in the design. This paper will analyze the general principles of the design of bolted joints, giving particular attention to the use of the VDI 2230 Guideline. The calculation of the stiffness of the joints using this guideline will be introduced and a comparison with the more commonly used approaches will be made. Finally an example of the calculations involved in the design of a bolted flange in a pressure vessel will be shown and a comparison of the different design and fatigue criteria made.

Optimizing the Interface of Cylinders in Composite Design of Pressure Vessels

1983 ◽  
Vol 22 ◽  
Author(s):  
Donald H. Newhall
Keyword(s):  
Fatigue Failure ◽  
Pressure Vessel ◽  
Pressure Vessels

ABSTRACTA method is presented of designing optimum proportions for cylinders in the composite design of a pressure vessel that limits catastrophic fatigue failure.

Introduction of the Technical Document in Japan for Safety Use of Type2 Pressure Vessels in Hydrogen Refueling Stations

2020 ◽  
Author(s):  
Shinya Sato ◽  
Hiroshi Kobayashi ◽  
Hajime Fukimoto ◽  
Shigeru Maeda ◽  
Nobuhiro Yoshikawa ◽  
...  
Keyword(s):  
Alloy Steel ◽  
Pressure Vessel ◽  
Metal Layer ◽  
Circumferential Stress ◽  
Fatigue Analysis ◽  
Pressure Vessels ◽  
Hydraulic Pressure ◽  
Technical Document ◽  
Low Alloy Steel ◽  
Rule Approach

Abstract We considered the Type2 pressure vessel (hereinafter, Type2) used in hydrogen refueling stations (hereinafter, HRS), a stational Composite Reinforced Pressure Vessel (hereinafter, CRPV) in which a metal layer made of high-strength low-alloy steel is wrapped with a carbon fiber reinforced plastic (hereinafter, CFRP) layer in the circumferential direction. Because Type2 is lightweight and has a long life, installation in HRS is expected. However, since no technical standards concerning design for safe use of Type2 for HRS currently exist, few Type2 have been installed in HRS in Japan. Based on these circumstances, we are developing a Technical Document on the safe use of Type2 (hereinafter, TD) to promote the installation of Type2 at HRS. In this paper, we introduce the current discussion on issuance of the TD as an industrial standard, focusing especially on the following: Type2 shall be considered a two-layer pressure vessel in which the CFRP layer shares the circumferential stress of the metal layer. The wall thicknesses of the metal layer and CFRP layer of Type2 are calculated by Design by Rule approach, but when necessary, Design by Analysis (stress analysis and fatigue analysis) can be applied. Design specification tests such as the burst test and hydraulic pressure cycle test using an actual Type2 should not be required. The hydrogen compatibility and fatigue life of the low-alloy steel used in the metal layer are evaluated in accordance with our previously-proposed methods [1]. In the fatigue analysis, the effect of autofrettage can be considered.

Code Case 2286 Applied to the Design of Pressure Vessels

2003 ◽  
Author(s):  
Kanhaiya L. Bardia ◽  
Kim Nguyen ◽  
Manfred Lengsfeld ◽  
Donald G. LaBounty ◽  
Bernie Au
Keyword(s):  
Pressure Vessel ◽  
Petrochemical Industry ◽  
External Pressure ◽  
Pressure Vessels ◽  
Compressive Stresses ◽  
Division 1 ◽  
Shell Design ◽  
Asme Code ◽  
Section Viii ◽  
Sample Vessel

Code Case 2286-1 [1] of the ASME Boiler and Pressure Vessel Code [2][3] provides alternate rules for determining the allowable external pressure and compressive stresses for cylinders, cones, spheres, and formed heads in lieu of the rules of Section VIII, Divisions 1 and 2. The authors in this paper present a comparison of the longitudinal and circumferential compressive stresses in pressure vessels based on the methods outlined in Paragraph UG-28 of Division 1, Section VIII of the ASME Code and Code Case 2286-1. The Do/t ratio in this paper is limited to 600 which covers the majority of pressure vessel designs found in the petrochemical industry. A sample vessel shell design is presented applying both the ASME Code, Section VIII, Div. 1 method and that of Code Case 2286-1.

Fatigue Design Rules in Pressure Vessel Codes Uncertainties and Remaining Open Points

2014 ◽  
Author(s):  
Claude Faidy
Keyword(s):  
Strain Amplitude ◽  
Pressure Vessel ◽  
Material Properties ◽  
Cyclic Strain ◽  
Fatigue Curve ◽  
Fatigue Analysis ◽  
Pressure Vessels ◽  
Life Assessment ◽  
Combination Rules ◽  
Reduction Factors

During the past 30 years the main rules for fatigue analysis of pressure vessels were based on elastic approaches in order to evaluate a cyclic strain amplitude and compare with an S-N fatigue curve for the corresponding material. After review of some rules in different Nuclear and Non Nuclear Codes, like ASME Boiler & Pressure Vessel Code Section III, French RCC-M and RCC-MRx, European Standards EN 13445, the major conservatisms and uncertainties of different rules are discussed. All these Codes propose simple rules to evaluate the strain amplitude based on elastic approaches and simplified correction factors (Ke and Kv), transient combination rules and damage cumulating procedure. In the other hand, the material properties are based on standard fatigue tests done on the material associated to reduction factors to consider some particular effects like scatter, scale, surface roughness, mean stress or environmental effects to transfer them from small specimen to real structures. Concerned components are mainly piping systems. No existing Code covers all the aspects of fatigue with similar conservatisms that can affect the in-service inspection programs and the remaining life assessment of the corresponding components. After the review of different rules, key factors that affect the results and predictions will be identified. Some proposals will be issued to progress in the near future. Finally, a first set of recommendation on fatigue analysis will be presented to improve existing codes on an harmonized way, associated to material properties needed, as fatigue curves associated to reduction factors.

Fatigue Analysis for CNG Storage Gas Pressure Vessel Based on ANSYS

2008 ◽  
Vol 33-37 ◽  
pp. 109-114
Author(s):  
Ya Xin Zhang ◽  
Jun Ge Du ◽  
Chuan Mei Shi
Keyword(s):  
Stress Analysis ◽  
Pressure Vessel ◽  
Maximum Stress ◽  
Fatigue Analysis ◽  
Pressure Vessels ◽  
Gas Pressure ◽  
Node Number ◽  
Damage Coefficient ◽  
Definition Of ◽  
Distributed Cloud

The fatigue destruction is one way of expiration of pressure vessels, In order to avoid the accident occurring, it is extremely important to carry on the fatigue analysis to the pressure vessels. First, this article introduces the definition of fatigue destruction, the primary factors of affecting the fatigue expiration, and the advantages the analysis principle when the ANSYS finite element is applied to fatigue analysis; Then, this article carries on the stress analysis based on ANSYS software to the CNG storage gas pressure vessel, produces the stress distributed cloud chart, and gets the node number where is the maximum stress; Finally, This article carries on the fatigue analysis based on stress analysis result, the fatigue analysis demonstrates the CNG pressure vessel is effective in the establishment service life, Its fatigue accumulative damage coefficient is smaller than 1,Which explain it can satisfy the fatigue strength request.

Stress Field Around a Large Opening in a Pressure Vessel During a Major Repair

2009 ◽  
Author(s):  
Erik Garrido ◽  
Euro Casanova
Keyword(s):  
Pressure Vessel ◽  
New Technologies ◽  
Mechanical Design ◽  
General Purpose ◽  
Pressure Vessels ◽  
Mechanical Equipment ◽  
Stress Distributions ◽  
Large Opening ◽  
Von Mises ◽  
Case Basis

It is a regular practice in the oil industry to modify mechanical equipment to incorporate new technologies and to optimize production. In the case of pressure vessels, it is occasionally required to cut large openings in their walls in order to have access to the interior part of the equipment for executing modifications. This cutting process produces temporary loads, which were obviously not considered in the original mechanical design. Up to now, there is not a general purpose specification for approaching the assessments of stress levels once a large opening in a vertical pressure vessel has been made. Therefore stress distributions around large openings are analyzed on a case-by-case basis without a reference scheme. This work studies the distribution of the von Mises equivalent stresses around a large opening in FCC Regenerators during internal cyclone replacement, which is a frequently required practice for this kind of equipment. A finite element parametric model was developed in ANSYS, and both numerical results and illustrating figures are presented.

Effect of Carbide Content on Temper Embrittlement of 2.25Cr1Mo Steel

2016 ◽  
Author(s):  
Yian Wang ◽  
Guoshan Xie ◽  
Zheng Zhang ◽  
Xiaolong Qian ◽  
Yufeng Zhou ◽  
...  
Keyword(s):  
High Temperature ◽  
Pressure Vessel ◽  
High Stress ◽  
Temper Embrittlement ◽  
Damage Mechanism ◽  
Pressure Vessels ◽  
Nondestructive Method ◽  
Operating Conditions ◽  
Low Alloy Steels ◽  
Carbide Content

Temper embrittlement is a common damage mechanism of pressure vessels in the chemical and petrochemical industry serviced in high temperature, which results in the reduction of roughness due to metallurgical change in some low alloy steels. Pressure vessels that are temper embrittled may be susceptible to brittle fracture under certain operating conditions which cause high stress by thermal gradients, e.g., during start-up and shutdown. 2.25Cr1-Mo steel is widely used to make hydrogenation reactor due to its superior combination of high mechanical strength, good weldability, excellent high temperature hydrogen attack (HTHA) and oxidation-resistance. However, 2.25Cr-1Mo steel is particularly susceptible to temper embrittlement. In this paper, the effect of carbide on temper embrittlement of 2.25Cr-1Mo steel was investigated. Mechanical properties and the ductile-brittle transition temperature (DBTT) of 2.25Cr-1Mo steel were measured by tensile test and impact test. The tests were performed at two positions (base metal and weld metal) and three states (original, step cooling treated and in-service for a hundred thousand hours). The content and distribution of carbides were analyzed by scanning electron microscope (SEM). The content of Cr and Mo elements in carbide was measured by energy dispersive X-ray analysis (EDS). The results showed that the embrittlement could increase the strength and reduce the plasticity. Higher carbide contents appear to be responsible for the higher DBTT. The in-service 2.25Cr-1Mo steel showed the highest DBTT and carbide content, followed by step cooling treated 2.25Cr-1Mo steel, while the as-received 2.25Cr-1Mo steel has the minimum DBTT and carbide content. At the same time, the Cr and Mo contents in carbide increased with the increasing of DBTT. It is well known that the specimen analyzed by SEM is very small in size, sampling SEM specimen is convenient and nondestructive to pressure vessel. Therefore, the relationship between DBTT and the content of carbide offers a feasible nondestructive method for quantitative measuring the temper embrittlement of 2.25Cr-1Mo steel pressure vessel.

A Study on Fatigue Life Evaluation of Pressure Vessel Made of ASME SA240-316L Material Using Numerical Analysis

2019 ◽  
Vol 893 ◽  
pp. 1-5 ◽  
Author(s):  
Eui Soo Kim
Keyword(s):  
Finite Element ◽  
Fatigue Life ◽  
Pressure Vessel ◽  
Life Prediction ◽  
Pressure Vessels ◽  
Physical Damage ◽  
Element Analysis ◽  
Internal Damage ◽  
Life Evaluation ◽  
Fatigue Life Evaluation

Pressure vessels are subjected to repeated loads during use and charging, which can causefine physical damage even in the elastic region. If the load is repeated under stress conditions belowthe yield strength, internal damage accumulates. Fatigue life evaluation of the structure of thepressure vessel using finite element analysis (FEA) is used to evaluate the life cycle of the structuraldesign based on finite element method (FEM) technology. This technique is more advanced thanfatigue life prediction that uses relational equations. This study describes fatigue analysis to predictthe fatigue life of a pressure vessel using stress data obtained from FEA. The life prediction results areuseful for improving the component design at a very early development stage. The fatigue life of thepressure vessel is calculated for each node on the model, and cumulative damage theory is used tocalculate the fatigue life. Then, the fatigue life is calculated from this information using the FEanalysis software ADINA and the fatigue life calculation program WINLIFE.

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