Study of the Stress Distribution Due to the Effect of Transient Analysis on a Vertical Pressure Vessel and Validation using the Mesh Independence Study

The importance of Pressure Vessel (PV) to industries is one of the reasons why the design and structural integrity should be fully understood and considered when deploring it in under different conditions. The design of such vessels need to be broadened with a detailed thermal stress due to its time-dependent different behaviours experienced under load. Therefore, this study aimed at investigation of transient analysis of PV when subjected to different operating condition. The PV used for this simulation was designed based on American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code (BPVC) 2019 and subjected to transient-stress analysis (transient thermal and structural) using ANSYS software. A complete evaluation of temperature, heat flux and resulting stress distribution across the vessel was estimated at four different locations within the designed PV and the obtained result was compared with analytically obtained results from appropriate standards. The accuracy of the result obtained from PV was validated using analysis of Mesh Independent Study (MIS), Grid Convergence Index (GCI) and fractional error obtained between the fine grid used. The results showed that there were different temperature and heat flux distribution at the considered locations, these varied distributions or change are according to various transients which are as a result of the load applied to the PV. The simulated maximum principal stress value was close to the analytically computed stress with a percentage error of 2.65% with respect to the analytically obtained result. The analysed maximum stress (W analysed) value 3400 MPa, obtained from MIS study was close to 3210 MPa obtained for maximum stress using numerical approach (WN). The GCI value obtained was 0.073 and fractional error of -0.003 which show that the result presented are grid independent solution.

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Simulation of the Pressure Vessel Saddle Thickness Effect to Stress Distribution

Mekanika: Majalah Ilmiah Mekanika ◽

10.20961/mekanika.v20i1.44938 ◽

2021 ◽

Vol 20 (1) ◽

pp. 18

Author(s):

Krisdiyanto Krisdiyanto

Keyword(s):

Finite Element ◽

Stress Distribution ◽

Pressure Vessel ◽

Maximum Stress ◽

Thickness Effect ◽

Cylinder Pressure ◽

Gas Industry ◽

Finite Element Software ◽

Complex Design ◽

As Stress

Cylinder pressure vessel is a device that is used to process industry, power industry, oil industry, and gas industry. Structure of pressure vessel has complex design that is used to accommodate force, temperature, internal pressure loading, etc. Pressure vessel loading is supported by two saddle. Loading pressure vessel is distributed to saddle as stress. Stress distribution can be checked by finite element software. Autodesk Inventor 2019 is a software that used finite element basic. This research aims to get the effect of pressure vessel saddle width to maximum stress at pressure vessel.

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Research of the Connecting Form about the Spherical Shell and the Nozzle

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.413.520 ◽

2011 ◽

Vol 413 ◽

pp. 520-523

Author(s):

Cai Xia Luo

Keyword(s):

Finite Element ◽

Stress Distribution ◽

Finite Element Model ◽

Spherical Shell ◽

Maximum Stress ◽

Peak Stress ◽

Element Model ◽

Small Opening ◽

Large Opening ◽

Reducing Stress

The Stress Distribution in the Connection of the Spherical Shell and the Opening Nozzle Is Very Complex. Sharp-Angled Transition and Round Transition Are Used Respectively in the Connection in the Light of the Spherical Shell with the Small Opening and the Large One. the Influence of the Two Connecting Forms on Stress Distribution Is Analyzed by Establishing Finite Element Model and Solving it. the Result Shows there Is Obvious Stress Concentration in the Connection. Round Transition Can Reduce the Maximum Stress in Comparison with Sharp-Angled Transition in both Cases of the Small Opening and the Large Opening, Mainly Reducing the Bending Stress and the Peak Stress, but Not the Membrane Stress. the Effect of Round Transition on Reducing Stress Was Not Significant. so Sharp-Angled Transition Should Be Adopted in the Connection when a Finite Element Model Is Built for Simplification in the Future.

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A Study of Nozzles in Pressure Vessels under Pressure Fatigue Loading

Proceedings of the Institution of Mechanical Engineers ◽

10.1243/pime_proc_1967_182_050_02 ◽

1967 ◽

Vol 182 (1) ◽

pp. 657-684 ◽

Cited By ~ 7

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.

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Stress Distribution Analysis of Different Types of Blade for a Fermentation System

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.479-480.319 ◽

2013 ◽

Vol 479-480 ◽

pp. 319-323

Author(s):

Cheng Chi Wang ◽

Po Jen Cheng ◽

Kuo Chi Liu

Keyword(s):

Stress Distribution ◽

Maximum Stress ◽

Effective Means ◽

Materials Processing ◽

Distribution Analysis ◽

Stress Distributions ◽

Fermentation System ◽

Different Types ◽

Inclined Angle ◽

Key Parameter

Fermentation system is widely used for food manufacturing, materials processing and chemical reaction etc. Different types of blade in the tank for fermentation cause distinct stress distributions on the surface between fluid and blade, and appear various flow fields in the tank. So, this paper is mainly focused on analyzing the stress field of blades under different scales of blade with fixing rotational speed. The results show that the ratio of blade length to width influences stress distribution on the blades. At the same time, the inclined angle of blade is also the key parameter for the consideration of design and appropriate design will decrease the maximum stress. The results provide an effective means of gaining insights into the stress distribution of fermentation system.

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Stress Calculation of a Spherical Tank on Settled Ground Based on FEM

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.331.110 ◽

2013 ◽

Vol 331 ◽

pp. 110-113

Author(s):

Hong Li Gao ◽

Wei Jun Li ◽

Zhi Hai Li

Keyword(s):

Stress Distribution ◽

Maximum Stress ◽

Differential Settlement ◽

Foundation Settlement ◽

Stress Calculation ◽

Spherical Tank

In this paper, a model of a LGP spherical tank supported by 8 equator tangent-type supporting on settled ground was built.The stress on the shell,on the pillars and on the connection of pillars with shell were calculated,the stress distribution on shell,pillars and the connection of pillars with shell were obtained, the influence of foundation settlement to the stress of shell and pillars were studied. The results showed that the differential settlement produced a less affect on the shell,but a greater impact on the pillars. The maximum stress arose at the connection between pillars and shell ,there is a big stress area in the connectors area.

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Individual Fracture Efficiency Monitoring in Horizontal Wells by Using a New 3d Fine-Grid Temperature Modelling

10.2118/207237-ms ◽

2021 ◽

Author(s):

Vitaly Virt ◽

Vladimir Kosolapov ◽

Vener Nagimov ◽

Andrey Salamatin ◽

Yulia Fesina ◽

...

Keyword(s):

Hydraulic Fracturing ◽

Oil Recovery ◽

Transient Analysis ◽

Horizontal Wells ◽

Sweep Efficiency ◽

Fine Grid ◽

Hydrodynamic Parameters ◽

Multistage Hydraulic Fracturing ◽

Multi Stage ◽

Differential Efficiency

Abstract Profitable development of hard-to-recover reserves often involves drilling of horizontal wells with multistage hydraulic fracturing to increase the oil recovery factor. Usually to monitor the fracture sweep efficiency, pressure transient analysis is used. However, in case of several fractures this method delivers only average hydrodynamic parameters of the well-fracture system. This paper illustrates the value of temperature logging data and demonstrates possibilities of the 3-D thermo-mechanical modelling in evaluating the differential efficiency of multi-stage hydraulic fracturing.

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Experimental investigation on the characteristics of the dynamic rail pad force and its stress distribution in the time and frequency domain

Proceedings of the Institution of Mechanical Engineers Part F Journal of Rail and Rapid Transit ◽

10.1177/0954409719838116 ◽

2019 ◽

Vol 234 (2) ◽

pp. 201-213 ◽

Cited By ~ 2

Author(s):

Xu Zhang ◽

Chunfa Zhao ◽

Xiaobo Ren ◽

Yang Feng ◽

Can Shi ◽

...

Keyword(s):

Stress Distribution ◽

Frequency Domain ◽

Maximum Stress ◽

Field Tests ◽

Service Condition ◽

Field Testing ◽

Dominant Frequency ◽

Test Results ◽

Parabolic Shape ◽

Dominant Frequencies

The rail pad force and its stress distribution have critical influences on the performance and fatigue life of the rail, fasteners, and sleepers. The characteristics of the rail pad force and its stress distribution in the time and frequency domain obtained from field tests carried out using matrix-based tactile surface sensor are presented in this paper. The field testing involved rail pads under various axle-loads of running trains at different speeds. The influences that the train axle-load, the operational speed, and the rail pad stiffness have on the rail pad force and its stress distribution are analyzed. The test results indicate that the rail pad stiffness has a remarkable influence on the amplitude of the rail pad force but has little influence on its dominant frequencies. The first dominant frequency of the rail pad force is quite close to the passing frequency of the vehicle length. The stress distribution on the rail pad has a parabolic shape along the longitudinal and the lateral directions with the large stress appearing near the center of the rail pad, and is remarkably affected by the service condition of the rail pad. The maximum stress is about 2.5 to 3 times of the average stress, which is significantly greater than the nominal stress resulting from the assumption of uniform stress distribution.

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Force Transfer and Stress Distribution in an Implant-Supported Overdenture Retained with a Hader Bar Attachment: A Finite Element Analysis

ISRN Dentistry ◽

10.1155/2013/369147 ◽

2013 ◽

Vol 2013 ◽

pp. 1-12 ◽

Cited By ~ 2

Author(s):

Preeti Satheesh Kumar ◽

Kumar K. S. Satheesh ◽

Jins John ◽

Geetha Patil ◽

Ruchi Patel

Keyword(s):

Finite Element ◽

Stress Concentration ◽

Stress Distribution ◽

Maximum Stress ◽

Alveolar Bone ◽

Von Mises Stress ◽

Element Analysis ◽

Finite Element Software ◽

Force Transfer ◽

Edentulous Mandible

Background and Objectives. A key factor for the long-term function of a dental implant is the manner in which stresses are transferred to the surrounding bone. The effect of adding a stiffener to the tissue side of the Hader bar helps to reduce the transmission of the stresses to the alveolar bone. But the ideal thickness of the stiffener to be attached to the bar is a subject of much debate. This study aims to analyze the force transfer and stress distribution of an implant-supported overdenture with a Hader bar attachment. The stiffener of the bar attachments was varied and the stress distribution to the bone around the implant was studied. Methods. A CT scan of edentulous mandible was used and three models with 1, 2, and 3 mm thick stiffeners were created and subjected to loads of emulating the masticatory forces. These different models were analyzed by the Finite Element Software (Ansys, Version 8.0) using von Mises stress analysis. Results. The results showed that the maximum stress concentration was seen in the neck of the implant for models A and B. In model C the maximum stress concentration was in the bar attachment making it the model with the best stress distribution, as far as implant failures are concerned. Conclusion. The implant with Hader bar attachment with a 3 mm stiffener is the best in terms of stress distribution, where the stress is concentrated at the bar and stiffener regions.

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