Discussion on the Implementation of the Primary Structure Method in Design by Analysis

2016 ◽  
Vol 853 ◽  
pp. 341-345
Author(s):  
Cheng Hong Duan ◽  
Li Wei Ding ◽  
Ming Wan Lu
Keyword(s):  
Cylindrical Shell ◽  
Stress Intensity ◽  
Stress Analysis ◽  
Primary Structure ◽  
Pressure Vessel ◽  
Elastic Stress ◽  
Original Structure ◽  
Analysis Method ◽  
Stress Classification ◽  
Axisymmetric Structure

The implementation of the primary structure method in design by analysis of pressure vessel is discussed. With two examples of axisymmetric structure of pressure vessel, flat head-cylindrical shell joint and flange-ellipsoidal head joint, the primary structure is constructed according to the principle of this method with ANSYS. By comparing the stress intensity and deformation of the primary structure with that of the original structure, the primary and secondary stress along the stress classification line can be clearly distinguished by using the primary structure method. It has great application value in dealing with stress classification in the elastic stress analysis method. The results also show that a variety of reasonable primary structures can be constructed based on the same original structure, and the primary structure method has some flexibility.

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.

Prediction of the Low Cycle Fatigue Life of Pressure Vessels

1967 ◽  
Vol 89 (4) ◽  
pp. 858-868 ◽  
Author(s):  
A. G. Pickett ◽  
S. C. Grigory
Keyword(s):  
Fatigue Life ◽  
Stress Analysis ◽  
Pressure Vessel ◽  
Low Cycle Fatigue ◽  
Design Procedure ◽  
Pressure Vessels ◽  
Analysis Method ◽  
Notch Stress ◽  
Fatigue Life Analysis ◽  
Fatigue Evaluation

The bases for ASME Boiler and Pressure Vessel Code, Section III, fatigue evaluation procedures, the fracture mechanics approach to fatigue life analysis, and the notch stress analysis method are reviewed. Fatigue life predictions are compared with the results of materials, model, and full size pressure vessel tests performed for PVRC and AEC. These tests were made in response to the research objectives established by ASME Special Committee to Review Code Stress Basis in 1958. A proposed design procedure based on the notch stress analysis method and experimental results is presented.

Construction of 3D Primary Structure and Stress Classification of Cylindrical Shell With Nozzle

2018 ◽  
Author(s):  
Chenghong Duan ◽  
Xinchen Wei ◽  
Jinhao Huang ◽  
Mingwan Lu
Keyword(s):  
Finite Element ◽  
Cylindrical Shell ◽  
Primary Structure ◽  
Equivalent Linearization ◽  
Finite Element Analyses ◽  
Shell Elements ◽  
Primary Stress ◽  
Stress Classification ◽  
3D Solid

The primary structure method is one of the effective methods to distinguish the primary stress and secondary stress. The knotty problem of stress classification can be solved by using the primary structure method and the equivalent linearization of stresses. The primary structure method has been successfully used to the finite element analyses with 2D axisymmetric elements and shell elements. A method to construct the primary structures with 3D solid elements is given in this paper, and the stress classification of cylindrical shell with nozzle is discussed in a new point view.

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.

scholarly journals Stress Linearization Concepts and Restrictions in Elastic Design by Analysis

2017 ◽  
Author(s):  
Don Mackenzie
Keyword(s):  
Stress Analysis ◽  
Pressure Vessel ◽  
Elastic Stress ◽  
Limit State ◽  
Design Procedure ◽  
Limit Load ◽  
Stress Distributions ◽  
Shakedown Analysis ◽  
Shell Analysis ◽  
Elastic Design

Stress linearization is widely used in Pressure vessel Design by Analysis based on elastic stress analysis and stress categorization. This paper investigates the structural mechanics basis of stress linearization in the context of limit and shakedown analysis and proposes a new basis for the procedure that relates the stress along a line to the concept of limit load. This removes the need for some conceptual requirements associated with shell analysis from stress linearization, including restriction of SCL location to identified bending planes. It also introduces the concept of selecting stress distributions representative of the limit state to remove the need for some elements of stress categorization in the design procedure.

Thermal stresses in cylindrical vessels with limpet coils

1979 ◽  
Vol 14 (4) ◽  
pp. 157-164
Author(s):  
R Kitching ◽  
K Zarrabi
Keyword(s):  
Cylindrical Shell ◽  
Computer Program ◽  
Stress Analysis ◽  
Thermal Stresses ◽  
Elastic Stress ◽  
Average Temperature ◽  
Wide Range ◽  
Maximum Stresses

A computer program is developed to undertake the elastic stress analysis of a limpet-coil vessel consisting of a cylindrical shell and part-circular coils, when the coils are at a different average temperature to that of the main shell. Results of the analysis are used to present data on maximum stresses for a wide range of practical geometries for the vessel.

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