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Research Papers: Design and Analysis

A New Method for Stress Categorization on Planes

[+] Author and Article Information
P. B. Godbole, Supak Pore

 BHEL Corporate R&D Division, Hyderabad, 500093, India

J. Pressure Vessel Technol 132(6), 061206 (Oct 15, 2010) (6 pages) doi:10.1115/1.4001521 History: Received May 28, 2009; Revised March 13, 2010; Published October 15, 2010; Online October 15, 2010

A new method employing the fitting of a least squares plane to stress distribution obtained from a finite element analysis for evaluating categorized values is presented. The property of a least squares fit, i.e., the preservation of volume under stress distribution and the plane of consideration, is used in evaluating various numerical integrals. The procedure is demonstrated through application to a typical shell nozzle junction.

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Copyright © 2010 by American Society of Mechanical Engineers
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Figures

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Figure 1

(a)–(d) Typical stress distributions

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Figure 2

Internal points for calculation of f(x,z)

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Figure 3

(a) Volume with f(x,z). (b) Volume with LSQ plane.

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Figure 4

Cross section of the beam

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Figure 5

A typical shell nozzle junction

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Figure 6

(a) Local plane, local axes, and location of points. (b)–(g) Stress contours corresponding to six stress components.

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