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.

Design Optimization of Pressure Vessel in Compliance With Elastic Stress Analysis Criteria for Plastic Collapse Using an Integrated Approach

2020 ◽  
Vol 143 (1) ◽  
Author(s):  
Mingjue Zhou ◽  
Artik Patel ◽  
BoPing Wang ◽  
Weiya Jin ◽  
Yuebing Li
Keyword(s):  
Stress Analysis ◽  
Design Optimization ◽  
Pressure Vessel ◽  
Maximum Stress ◽  
Elastic Stress ◽  
Integrated Approach ◽  
Optimization Methods ◽  
Pressure Vessels ◽  
Design Codes ◽  
Division 2

Abstract The design and verification of pressure vessels is governed by the design codes specified by the ASME Boiler and Pressure Vessel Code (BPVC). Convention design satisfying the ASME BPVC code requirements would lead to a conservative design. This situation will to be solvable by modern structural optimization methods. The size optimization of pressure vessel complying with design-by-analysis requirements within the ASME Sec. VIII Division 2 specification is discussed in this paper. This is accomplished by an integrated approach in which the stress analysis is carried out by ANSYS. These results are used by an optimization code in matlab to perform design optimization. The integrated approach is fully automated and applied to the optimal design of a real pressure vessel. The results show that the material used by the pressure vessel can be minimized while satisfying the maximum stress specified in the BPVC.

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.

A Study of Nozzles in Pressure Vessels under Pressure Fatigue Loading

1967 ◽  
Vol 182 (1) ◽  
pp. 657-684 ◽  
Author(s):  
J. Spence ◽  
W. B. Carlson
Keyword(s):  
Fatigue Life ◽  
Mild Steel ◽  
Pressure Vessel ◽  
Special Interest ◽  
Maximum Stress ◽  
Fatigue Loading ◽  
Fatigue Tests ◽  
Pressure Vessels ◽  
Full Size

Nozzles in cylindrical vessels have been of special interest to designers for some time and have offered a field of activity for many research workers. This paper presents some static and fatigue tests on five designs of full size pressure vessel nozzles manufactured in two materials. Supporting and other published work is reviewed showing that on the basis of the same maximum stress mild steel vessels give the same fatigue life as low alloy vessels. When compared on the basis of current codes it is shown that mild steel vessels may have five to ten times the fatigue life of low alloy vessels unless special precautions are taken.

Support Analysis of Horizontal Pressure Vessel Using FEA

2014 ◽  
Vol 592-594 ◽  
pp. 1220-1224
Author(s):  
Navin Kumar ◽  
Surjit Angra ◽  
Vinod Kumar Mittal
Keyword(s):  
Stress Analysis ◽  
Pressure Vessel ◽  
Theoretical Basis ◽  
Pressure Vessels ◽  
Loading Conditions ◽  
Ansys Software ◽  
Support Design ◽  
Horizontal Pressure ◽  
The Given

Saddles are used to support the horizontal pressure vessels such as boiler drums or tanks. Since saddle is an integral part of the vessel, it should be designed in such a way that it can withstand the pressure vessel load while carrying liquid along with the operating weight. This paper presents the stress analysis of saddle support of a horizontal pressure vessel. A model of horizontal pressure vessel and saddle is created in Ansys software. For the given boundry and loading conditions, stresses induced in the saddle support are analyzed using Ansys software. After analysis it is found that maximum localized stress arises at the saddle to vessel interface near the saddle horn area. The results obtained shows that the saddle support design is safe for the given loading conditions and provides the theoretical basis for furthur optimisation.

Random Vibration and Fatigue Analysis of Pressure Vessel

2013 ◽  
Vol 816-817 ◽  
pp. 695-697
Author(s):  
Mei Huang ◽  
Hao Yuan ◽  
Juan Ma ◽  
J.N. Tang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Fatigue Strength ◽  
Pressure Vessel ◽  
Random Vibration ◽  
Maximum Stress ◽  
Fatigue Analysis ◽  
Element Method

In this article, finite element method is used to analyze the random vibration of the pressure vessel under the action of earthquake. The result shows that the maximum stress values are located at the bottom of the pressure vessel. At the same time, fatigue in this location has been analyzed. It can come to a conclusion that this pressure vessel meets the requirement of fatigue strength.

Elastic-Plastic Stress Analysis of Pressure Vessels

2012 ◽  
Author(s):  
Yang-chun Deng ◽  
Gang Chen
Keyword(s):  
Internal Pressure ◽  
Stress Analysis ◽  
Strain Hardening ◽  
Pressure Vessel ◽  
Plastic Instability ◽  
Pressure Vessels ◽  
Structural Deformation ◽  
Elastic Plastic ◽  
Thin Walled ◽  
Plastic Stress

To save material, the safety factor of pressure vessel design standards is gradually decreased from 5.0 to 2.4 in ASME Boiler and Pressure Vessel Codes. So the design methods of pressure vessel should be more rationalized. Considering effects of material strain hardening and non-linear structural deformation, the elastic-plastic stress analysis is the most suitable for pressure vessels design at present. This paper is based on elastic-plastic theory and considers material strain hardening and structural deformation effects. Elastic-plastic stress analyses of pressure vessels are summarized. Firstly, expressions of load and structural deformation relationship were introduced for thin-walled cylindrical and spherical vessels under internal pressure. Secondly, the plastic instability for thin-walled cylindrical and spherical vessels under internal pressure were analysed. Thirdly, to prevent pressure vessels from local failure, the ductile fracture strain of materials was discussed.

Overview of Revisions to the ASME Boiler and Pressure Vessel Code Section VIII Division 3 for the 2015 Edition and Near Future

2015 ◽  
Author(s):  
Daniel Peters ◽  
Adam P. Maslowski
Keyword(s):  
High Pressure ◽  
Stress Analysis ◽  
Pressure Vessel ◽  
Elastic Stress ◽  
Pressure Vessels ◽  
Chemical Safety ◽  
Linear Elastic ◽  
Section Viii ◽  
American Society ◽  
Near Future

This paper is to give an overview of the major revisions pending in the upcoming 2015 edition of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code (BPVC) Section VIII Division 3, Alternative Rules for Construction of High Pressure Vessels, and potential changes being considered by the Subgroup on High Pressure Vessels (SG-HPV) for future editions. This will include an overview of significant actions which will be included in the upcoming edition. This includes action relative to test locations in large and complex forgings, in response to a report from the U.S. Chemical Safety and Hazard Investigation Board (CSB) report of a failed vessel in Illinois. This will also include discussion of a long term issue recently completed on certification of rupture disk devices. Also included will be a discussion of a slight shift in philosophy which has resulted in the linear-elastic stress analysis section being moved to a Non-Mandatory Appendix and discussion of potential future of linear-elastic stress analysis in high pressure vessel design.

A Modified Weld Structure of Layered Urea Reactor Based on Stress Analysis and Leak Detection

2012 ◽  
Vol 134 (3) ◽  
Author(s):  
Shugen Xu ◽  
Weiqiang Wang ◽  
Mengli Li
Keyword(s):  
Finite Element ◽  
Stress Analysis ◽  
Pressure Vessel ◽  
Calculation Result ◽  
Maximum Stress ◽  
Leak Detection ◽  
Finite Element Software ◽  
Weld Structure ◽  
Status Analysis ◽  
Modified Urea

In this paper, a modified weld structure of the layered urea reactor has been provided. In the modified structure, new circumferential weld can improve the stress status of the urea reactor. It has the both advantage of separated and integrated layered pressure vessel. This modified design is based on the stress status analysis and the requirement of leak detection. In order to evaluate the modified structure, stresses of original and modified urea reactor shell with interlayer gaps were calculated via Finite element software ANSYS 12.0. The calculation result shows that the maximum stress of the modified structure is reduced obviously in the same condition, and the leak of liner also can be detected effectively.

Life Prediction of Composite Pressure Vessels Using Multi-Scale Approach

2010 ◽  
Author(s):  
Sung Kyu Ha ◽  
Stephen W. Tsai ◽  
Seong Jong Kim ◽  
Khazar Hayat ◽  
Kyo Kook Jin
Keyword(s):  
Fatigue Life ◽  
Stress Analysis ◽  
Pressure Vessel ◽  
Composite Structures ◽  
Life Prediction ◽  
Pressure Vessels ◽  
Multi Scale ◽  
Helical Angle ◽  
Composite Pressure Vessel ◽  
Composite Pressure Vessels

A multi-scale fatigue life prediction methodology of composite pressure vessels subjected to multi-axial loading has been proposed in this paper. The multi-scale approach starts from the constituents, fiber, matrix and interface, leading to predict behavior of ply, laminates and eventually the composite structures. The life prediction methodology is composed of two steps: macro stress analysis and micro mechanics of failure based on fatigue analysis. In the macro stress analysis, multiaxial fatigue loading acting at laminate is determined from finite element analysis (FEM) of composite pressure vessel, and ply stresses are computed using a classical laminate theory (CLT). The micro-scale stresses are calculated in each constituent (i.e. matrix, interface, and fiber) from ply stresses using a micromechanical model. Micromechanics of failure (MMF) was originally developed to predict the strength of composites and now extended to prediction of fatigue life. Two methods are employed in predicting fatigue life of each constituent, i.e. an equivalent stress method for multi-axially loaded matrix, and a critical plane method for the interface. A modified Goodman diagram is used to take into account the generic mean stresses. Damages from each loading cycle are accumulated using Miner’s rule. Each fiber is assumed to follow a probabilistic failure depending on the length. Using the overall micro and macro models established in this study, Monte Carlo simulation has been performed to predict the overall fatigue life of a composite pressure vessel considering statistical distribution of material properties of each constituent and manufacturing winding helical angle.

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