Stress analysis of the welds in the girder

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The girder at the back of each module plays an important structural role in the assembly of the Tilecalorimeter barrel. It is important, therefore, to clearly understand the welds within the girder. In order to understand the stresses in the welds, a 2-dimensional finite element model has been constructed of the girder cross section similar to the model that has been previously used by J. Blocki to analyze the girder. The current European welding norms do not require stress concentrations within welds to be considered except under fatigue loading conditions. Since this is not the case for this design, the ... continued below

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9 p.

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Guarino, V. December 1, 1997.

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  • Guarino, V. Argonne National Lab., IL (United States). High Energy Physics Div.

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Description

The girder at the back of each module plays an important structural role in the assembly of the Tilecalorimeter barrel. It is important, therefore, to clearly understand the welds within the girder. In order to understand the stresses in the welds, a 2-dimensional finite element model has been constructed of the girder cross section similar to the model that has been previously used by J. Blocki to analyze the girder. The current European welding norms do not require stress concentrations within welds to be considered except under fatigue loading conditions. Since this is not the case for this design, the use of the average stress in sizing the welds is allowed under the European welding norms. An analysis of the welds by V. Romanov that only considered the average stress, showed that the average weld stress was 38N/mm{sup 2}, well within acceptable limits. However, it should be kept in mind that the forces on the welds vary significantly along the length of the girder so the average stress may not be an adequate method of analyzing these welds. In addition, since these welds are so critical to the structural integrity of the Tilecalorimeter, it is desirable to examine stress concentrations even though this is not required by the european norms. Therefore, it is recommended that a 30mm wide bar as shown in Figure 3 be used on the ten modules that see the highest load from the cryostat. This is a very simple and low-cost modification to a small number of girders that will provide significant additional safety.

Physical Description

9 p.

Notes

INIS; OSTI as DE98003204

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  • Other Information: PBD: 1 Dec 1997

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  • Other: DE98003204
  • Report No.: ANL-HEP-TR--98-06
  • Grant Number: W-31109-ENG-38
  • DOI: 10.2172/578678 | External Link
  • Office of Scientific & Technical Information Report Number: 578678
  • Archival Resource Key: ark:/67531/metadc691171

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Creation Date

  • December 1, 1997

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

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  • Dec. 15, 2015, 11:42 a.m.

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Guarino, V. Stress analysis of the welds in the girder, report, December 1, 1997; Illinois. (digital.library.unt.edu/ark:/67531/metadc691171/: accessed June 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.