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TECHNICAL BRIEFS

Comparative Evaluation of Finite Element Models and Types of Analyses for a Bolted Joint

[+] Author and Article Information
R. Padmaja1

 National Institute of Technology, Warangal (A.P.), India-506004

R. Ravinder Rao1

 National Institute of Technology, Warangal (A.P.), India-506004rangaraju̱ṟr@hotmail.com

B. Kotiveerachari

 National Institute of Technology, Warangal (A.P.), India-506004

P. B. Godbole

Corporate R&D,  B.H.E.L., Vikasnagar, Hyderabad (A.P.), India-500 093

1

Corresponding author.

J. Mech. Des 127(6), 1207-1210 (Feb 09, 2005) (4 pages) doi:10.1115/1.2118647 History: Received April 01, 2004; Revised February 09, 2005

The present work is aimed at evaluating different ways in which a given joint can be analyzed using the Finite Element Method. The bolt is modeled using line elements (link) or area elements (continuum) and a comparative evaluation is carried out. Each of these types is further subdivided into three categories viz., plane stress, axisymmetric, and three-dimensional models. Thus a total of six models are proposed to be analyzed and compared. As the bolt shares only a small fraction of external load in a well-tightened joint, the relative flexibility of a bracket is also studied as an example in the present work. Comparing the results of these analyses it was found that the type of model used for the bolt is more important than the type of analysis. This aspect is probed further to find the essential difference between bolt as link and bolt as continuum. The analysis is carried out using ANSYS, which enables writing many parametric programs.

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Copyright © 2005 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Models of plate and bolt

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Figure 2

Bolt models as link and continuum

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Figure 3

Bracket and bolt models

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Figure 4

Load share analysis of bolt and bracket

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