0

Full Content is available to subscribers

Subscribe/Learn More  >

Load Recovery of a Bolted Joint With a Shape Memory Alloy Stud

[+] Author Affiliations
Nazim Ould-Brahim, Abdel-Hakim Bouzid, Vladimir Brailovski

École de Technologie Supérieure, Montreal, QC, Canada

Paper No. PVP2011-57384, pp. 321-328; 8 pages
doi:10.1115/PVP2011-57384
From:
  • ASME 2011 Pressure Vessels and Piping Conference
  • Volume 2: Computer Technology and Bolted Joints
  • Baltimore, Maryland, USA, July 17–21, 2011
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-4452-6
  • Copyright © 2011 by ASME

abstract

Creep is an important factor that contributes to the clamp load loss and tightness failure of bolted joints. Retightening of the joint can be expensive, time consuming and therefore is an undesirable solution. Currently, most efforts are put towards reducing load losses directly by tightening to yield, improving material creep properties or making joint less rigid. An alternative solution of current interest is the use of bolts in Shape Memory Alloys (SMA). However very few experimental studies are available that demonstrates its feasibility. The objective of this study is to exploit the benefit of the shape memory and superelasticity behaviors of a SMA stud to recover the load losses due to creep and thermal exposure of a gasket in a bolted joint assembly. This paper explores several venues to investigate and model the thermo-mechanical properties of a bolted joint with a nickel-titanium SMA stud. A stiffness-based analytical model which incorporates the Likhachev model of SMA is used as a representation of an experimental bolted joint assembly. Using this model, the rigidity of the experimental setup is optimized to make the best use of the SMA properties of the stud. This analytical model is compared with a Finite Element Model which also implements the Likhachev’s material law. Finally an experimental test bench with a relatively low stiffness representative of EN and JIS flanges is used, with and without gaskets to demonstrate the ability of the SMA stud to recover load losses due to gasket creep.

Copyright © 2011 by ASME

Figures

Tables

Interactive Graphics

Video

Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In