Equivalent properties of pure metallic reinforcement for pressure vessels using the finite element method

2021 ◽  
Vol 43 (6) ◽  
Author(s):  
Luis Celaya Garcia ◽  
Miguel Gutierrez Rivera ◽  
Elias Ledesma Orozco ◽  
Salvador M. Aceves ◽  
Israel Martinez Ramirez
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Pressure Vessels ◽  
The Finite Element Method ◽  
Metallic Reinforcement ◽  
Equivalent Properties ◽  
Element Method

FFS Assessment of Pressurized Equipment Utilizing a Thickness Mapping Tool

2016 ◽  
Author(s):  
Benjamin Hantz ◽  
Venkata M. K. Akula ◽  
John Leroux
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Response Prediction ◽  
Accurate Estimate ◽  
Pressure Vessels ◽  
The Finite Element Method ◽  
Element Analysis ◽  
Level 3 ◽  
Level 1 ◽  
Element Method

For pressure vessels, loss of thickness detected during scheduled maintenance utilizing UT scans can be assessed based on Level 1 or 2 analyses as per API 579 guidelines. However, Level 1 and 2 analyses can point to excessively conservative assessments. Level – 3 assessments utilizing the finite element method can be performed for a more accurate estimate of the load carrying capacity of the corroded structure. However, for a high fidelity structural response prediction using the finite element method, the characteristics of the model must be accurately represented. Although the three nonlinearities, namely, the geometric, material, and contact nonlinearities can be adequately included in a finite element analysis, procedures to accurately include the thickness measurements are not readily available. In this paper, a tool to map thicknesses obtained from UT scans onto a shell based finite element models, to perform Level – 3 analyses is discussed. The tool works in conjunction with Abaqus/CAE and is illustrated for two different structures following the elastic-plastic analysis procedure outlined in the API 579 document. The tool is intended only as a means to reduce the modeling time associated with mapping thicknesses. The results of the analyses and insights gained are presented.

Static Analysis of Buttress Threads Using the Finite Element Method

1992 ◽  
Vol 114 (2) ◽  
pp. 209-212 ◽  
Author(s):  
A. Chaaban ◽  
M. Jutras
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
High Pressure ◽  
Load Distribution ◽  
Pressure Vessels ◽  
Stress Index ◽  
The Finite Element Method ◽  
Thread Root ◽  
Root Stress ◽  
Element Method

The finite element method has been used to investigate the stress field in threaded end closures of thick-walled high pressure vessels. A set of elastic analyses of vessels with 5, 8, 11, 15, 20 and 25 standard Buttress threads was used to propose a method for predicting the load distribution along the length of the thread. Root stress index factors in the region of the first three active threads are also included. The results of the present work contribute to the development of the new division of the ASME Pressure Vessel Code which is related to thick-walled high pressure vessels.

Large deformation and stability analysis of functionally graded pressure vessels: An analytical and numerical study

2017 ◽  
Vol 232 (18) ◽  
pp. 3300-3314 ◽  
Author(s):  
Ali Moallemi ◽  
Mostafa Baghani ◽  
Akbar Almasi ◽  
Mohammad Reza Zakerzadeh ◽  
Majid Baniassadi
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Distribution Function ◽  
Numerical Study ◽  
Pressure Vessels ◽  
Functionally Graded ◽  
Material Distribution ◽  
The Finite Element Method ◽  
Stress Components ◽  
Element Method

This paper develops stability and stress analysis of hyperelastic thick-walled pressure vessel made of isotropic, incompressible functionally graded material. Among all existing energy density functions, the exp–exp form including exponential terms is selected to model the hyperelastic behavior due to its appropriate compatibility with experiments. All stress components are obtained both analytically and numerically. Furthermore, the stress components for homogenous and functionally graded vessels are presented and compared with each other. The results propose that functionally graded materials properties have a great effect on all stress components distribution and more importantly on their rate of changes throughout the thickness. Also, the snap-through instability is performed. A comprehensive study is carried out on sensitivity of stresses to the parameters of the material distribution function. It is shown that the two involved parameters in the selected material distribution function have a significant influence on the stress fields in an opposite manner. These results are useful from a design viewpoint, can be utilized in various industrial applications, to control stresses and avoid failure. To verify the proposed analytical results, the finite element method is employed in some cases. The results of the finite element method simulation and analytical solutions are shown to be in a good agreement.

scholarly journals Application of the Finite Element Method to the Quasi-Static Thermoelastic Analysis of Prestress in Multilayer Pressure Vessels

1994 ◽  
Vol 116 (3) ◽  
pp. 254-260 ◽  
Author(s):  
J. Rasty ◽  
P. Tamhane
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Construction Material ◽  
Pressure Vessels ◽  
Construction Process ◽  
The Finite Element Method ◽  
Closed Form Solutions ◽  
Distribution Of Stress ◽  
Section Analysis ◽  
Element Method

Multilayered wrapped vessel technology utilizes the compressive prestress induced during construction process to gain a considerable advantage over the monoblock vessels. The compressive prestress allows for more efficient use of construction material and more uniform distribution of stress throughout the vessel’s cross section. Analysis of the magnitude of prestress throughout the vessel’s thickness has been previously reported (Rasty, 1988). However, one major idealization in such analysis has been the assumption that the magnitude of induced prestress is constant around the circumference of the vessel. In this research, thermoelastic finite element method was utilized to simulate the construction process of one layer of the vessel. It was concluded that the compressive residual stress induced by the weld shrinkage varies through the circumference of the vessel by as much as 13.5 percent. Circumferential distributions of the prestress are presented and compared to the closed-form solutions (constant prestress assumption) in earlier works.

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