We use cookies to ensure that we give you the best experience on our website. By continuing to browse this repository, you give consent for essential cookies to be used. You can read more about our Privacy and Cookie Policy.

Durham e-Theses
You are in:

Measurement of stress in bolts using resonant ultrasound spectroscopy

Srinivasan, Lakshmi (2006) Measurement of stress in bolts using resonant ultrasound spectroscopy. Masters thesis, Durham University.

[img]Archive (ZIP) (Two cds.: Compressed folder “Lakshmi Srinivasan Jan 2006 Measurement of Stress in Bolts using Rus” and “Measurement of Stress in Bolts Lakshmi Srinivasan Jan 2006” from the separate cd.)


Stress affects the resonance properties of materials. A suitable technology and instrumentation for calculating stress in pre-installed oil pipeline bolts is developed and tested. The technology, Resonant Ultrasound Spectroscopy (RUS), relates the change in bolt resonances to bolt stress, using analysis software. A suitable instrumentation that excites the bolt over a band of frequencies through a broad band sweep and measures the response to compute resonances and bolt stress is developed. The instrumentation and the analysis software operate in a loop with minimum operator input to predict stress in the bolts. The project is primarily aimed at the oil and gas industry but has the potential to fit bolt-testing applications in aerospace, defence and manufacturing industries. The proposed testing method is new to Non Destructive Testing (NDT) of oil pipeline bolts and has no peers. A calibration data set is built using the resonance information extracted from a set of bolts. Test results are discussed and areas of future work explored. A stress prediction accuracy of = 20% has been achieved with a group of 10 B7 bolts. This project is a Knowledge Transfer Partnership (KTP) project and was done at Hedley Purvis Ltd., in association with Durham University.

Item Type:Thesis (Masters)
Award:Master of Science
Thesis Date:2006
Copyright:Copyright of this thesis is held by the author
Deposited On:05 Sep 2011 17:24

Social bookmarking: del.icio.usConnoteaBibSonomyCiteULikeFacebookTwitter