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Research Papers: Design and Analysis

Simplified Limit Load Determination Using the mα-Tangent Method

[+] Author and Article Information
R. Seshadri

Faculty of Engineering and Applied Science, Memorial University, St. John’s, NL A1B 3X5, Canada

M. M. Hossain1

Faculty of Engineering and Applied Science, Memorial University, St. John’s, NL A1B 3X5, Canadamosharraf.hossain@mun.ca

1

Corresponding author.

J. Pressure Vessel Technol 131(2), 021213 (Jan 23, 2009) (7 pages) doi:10.1115/1.3067001 History: Received October 22, 2007; Revised April 28, 2008; Published January 23, 2009

Limit load determination of mechanical components and structures by the mα-tangent method is proposed herein. The proposed technique is a simplified method that enables rapid determination of limit loads for a general class of mechanical components and structures. The method makes use of statically admissible stress field based on a linear elastic finite element analysis to estimate the limit loads. The method is applied to a number of mechanical component configurations and the results compare well with those obtained by the corresponding elastic-plastic finite element analyses results.

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Copyright © 2009 by American Society of Mechanical Engineers
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References

Figures

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Figure 2

The constraint map

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Figure 3

Reference two-bar structure (8)

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Figure 4

The mα-tangent construction

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Figure 5

Stress distribution ahead of notch tip

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Figure 6

Thick walled cylinder (a) geometry and (b) finite element mesh (plane strain)

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Figure 10

Reinforced nozzle on a hemispherical head (a) geometry and (b) finite element mesh (axisymmetric)

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Figure 1

Regions of lower and upper bounds of mα

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Figure 8

Indeterminate beam (a) geometry and (b) finite element mesh (plane stress)

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Figure 7

Plate with a hole (a) geometry and (b) finite element mesh (plane stress)

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Figure 9

Unreinforced nozzle on a hemispherical head (a) geometry and (b) finite element mesh (axisymmetric)

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