Analysis of Welded Connection Plates by Using ANSYS (Comparative Study – Finite Element Analysis with Elastic Analysis)

In previous papers, practical limits on the maximum applied load for standard ASME B16.5 and B16.47 carbon steel, weld neck pipe flanges were examined. A new code equation for the tangential (hoop) stress at the small end of the hub for a weld neck flange was developed to facilitate calculation of the limits using elastic analysis. The results were verified against elastic-plastic Finite Element Analysis (FEA). In this paper, the work is extended to include other flange configurations, including loose ring flanges, slip-on flanges and flat plate flanges. This paper is a continuation of the papers presented during PVP 2006 and PVP 2007 (Brown [1, 2]) and it extends the scope of the proposed methodology for determining flange stress limits in determining the maximum allowable bolt load for any given flange size and configuration.

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A comparative study of stress distribution between glass fiber post and cast post in an endodontically treated central incisor – A finite element analysis

Journal of Interdisciplinary Dentistry ◽

10.4103/jid.jid_35_19 ◽

2019 ◽

Vol 9 (3) ◽

pp. 108

Author(s):

Padmashini Gnanam ◽

N Vignesh ◽

S Lakshmi ◽

H Annapoorani

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Stress Distribution ◽

Comparative Study ◽

Glass Fiber ◽

Central Incisor ◽

Fiber Post ◽

Element Analysis ◽

Glass Fiber Post

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A Review of Optimising the Design of a New Coke Drum Skirt

Volume 3: Design and Analysis ◽

10.1115/pvp2019-93135 ◽

2019 ◽

Author(s):

Alex Berry ◽

Warren Brown ◽

Antonio Seijas ◽

Sarah Cook

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Fatigue Life ◽

Literature Review ◽

Thermal Stresses ◽

Fatigue Cracking ◽

Element Analysis ◽

Long Life ◽

Welded Connection

Abstract Coke drums are subjected to severe thermal cycling with the skirt to shell connection weld being vulnerable to fatigue cracking. It is essential this connection is well designed to ensure a long life before repairs are inevitably required. Much has been written on coke drum skirt design with the aim of reducing the thermal stresses and strains encountered at the skirt connection weld, some designs have removed the weld completely allowing the drum to sit in an “egg-in-cup” arrangement. This paper includes a short literature review discussing Coke drum skirt designs and explains skirt behaviour during the drum cycle that results in eventual skirt cracking. A case study is reviewed in detail for a new pair of coke drums, where the predicted fatigue life of the chosen welded connection is assessed using axisymmetric, quarter symmetry and half symmetry finite element analysis supported by thermocouple data. The optimised design focuses on a conventional tangential design where the effects of the essential variables such as skirt thickness, skirt connection location, skirt-to head-gap and slot design (length, location & spacing) have been modelled and optimised to obtain a skirt design that produces the longest fatigue life for the intended duty cycle. Coke drum skirts must be installed onto the shell to exacting tolerances during manufacture to ensure concentricity and minimal gap between the skirt and shell. A brief overview of how this is achieved will be presented.

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