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TECHNICAL PAPERS

Procedures for the Verification and Validation of Working Models for Structural Shells

[+] Author and Article Information
Barna A. Szabo

 Washington University, St. Louis, MO 63130szabo@wustl.edu

Daniel E. Muntges

 Washington University, St. Louis, MO 63130dem2@wustl.edu

StressCheck is a trademark of Engineering Software Research and Development, Inc., St. Louis, MO.

J. Appl. Mech 72(6), 907-915 (Mar 25, 2005) (9 pages) doi:10.1115/1.2043189 History: Received July 22, 2004; Revised March 25, 2005

Shell-like structures are viewed as fully three-dimensional solid bodies that allow the imposition of restrictions on the transverse variation of displacement vector components in certain regions. An important practical problem is to select a simplified mathematical model for a particular application so that the simplifications do not affect the data of interest significantly. This involves application of expert knowledge aided by virtual and∕or physical experimentation. An example is presented.

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Copyright © 2005 by American Society of Mechanical Engineers
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Figures

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Figure 1

Experimental arrangement (reproduced with permission from Oak Ridge National Laboratory)

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Figure 2

Detail of test article instrumented with strain gages (reproduced with permission from Oak Ridge National Laboratory)

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Figure 3

(a) The 12 degrees of freedom HCT triangle and (b) composite nonplanar quadrilateral element assembled from four HCT triangles

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Figure 4

Finite element mesh used in the ORNL investigation. There are 649 nodal points, of which 25 nodal points are at the intersection: Source: ORNL-DWG 69-10664R (reprinted with permission from Oak Ridge National Laboratory)

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Figure 5

The 188-element mesh used in the present investigation

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Figure 6

Mesh detail at the intersection region and location of the strain gages in the plane of symmetry nearest to the intersection; 188-element mesh

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Figure 7

Convergence of the equivalent stress at node A shown in Fig. 6, 188-element mesh

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Figure 8

Convergence of the equivalent stress at node B shown in Fig. 6; 188-element mesh

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Figure 9

Equivalent stress on the inside surface of the cylinder versus distance from the midsurface of the nozzle

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