Preprint Article Version 2 Preserved in Portico This version is not peer-reviewed

Analytical and Numerical Investigation of Fatigue Life in Rectangular Plates with Opposite Semicircular Edge Single Notches

Version 1 : Received: 19 May 2023 / Approved: 19 May 2023 / Online: 19 May 2023 (16:30:24 CEST)
Version 2 : Received: 26 May 2023 / Approved: 30 May 2023 / Online: 30 May 2023 (03:04:41 CEST)

A peer-reviewed article of this Preprint also exists.

Hazizi, K.; Ghaleeh, M.; Rasool, S. Analytical and Numerical Investigation of Fatigue Life in Rectangular Plates with Opposite Semicircular Edge Single Notches. Appl. Mech. 2023, 4, 948-973. Hazizi, K.; Ghaleeh, M.; Rasool, S. Analytical and Numerical Investigation of Fatigue Life in Rectangular Plates with Opposite Semicircular Edge Single Notches. Appl. Mech. 2023, 4, 948-973.

Abstract

As the demand for liquefied petroleum gas (LPG) continues to increase worldwide, more LPG facilities are being constructed. However, the design and manufacture of pressure vessels used to store dangerous liquids or pressurised fluids, such as LPG, has been a major cause of hazards, including explosions and leakage. In this study, we aim to address this issue by designing and analysing a vertical pressure vessel with a capacity of 10 m3 of pressurised LPG in accordance with the American Society of Mechanical Engineers (ASME) code. Safety is the primary concern in designing pressure vessels due to the potential risks posed by accidents. Therefore, the main objective of this project is to design a pressure vessel that is safe from failure. The vessel is cylindrical with two elliptical heads, two nozzles, a manway and four leg supports, and we used Autodesk Inventor Professional 2023 for geometric modelling and Inventor Nastran for FEA analysis. To investigate the displacements, deflections and Von-Mises stresses in the pressure vessel, we used the finite element method, and Autodesk Inventor Nastran was employed for the analysis. Our results showed that changes to the structure of the pressure vessel were needed to reduce stress in the structure. Specifically, the displacement showed an inverse relationship with the tank section shell thickness. Moreover, we observed that the factor of safety increased linearly with shell thickness. We carefully considered permissible pressures and determined the required wall thickness to ensure acceptable maximum stresses. Our results indicate that the design is safe from failure, and the highest stresses are experienced by the manway followed by the shell, while the heads, nozzles and legs support experienced the lowest stresses. We also performed a theoretical calculation for the entire model and checked the results to ensure they were within the acceptable limits. In summary, our study highlights the importance of designing pressure vessels in accordance with ASME codes to ensure safety and prevent hazards caused by improper design and manufacturing. By using the finite element method, we identified potential stress points in the pressure vessel and were able to make modifications to improve its safety.

Keywords

pressure vessel:; ASME code; optimum design; working pressure; structural analysis; finite element method; autodesk inventor professional

Subject

Engineering, Mechanical Engineering

Comments (1)

Comment 1
Received: 30 May 2023
Commenter: Kristaq Hazizi
Commenter's Conflict of Interests: Author
Comment: Chenged reference style to IEEE and updated all references.
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