Thermoelastic Stress Analysis of Structures Under Natural Vibrations

Phan, Thanh Song; Dulieu-Barton, J.M.; Temarel, P.

doi:10.1007/s11340-006-8445-6

Cited by 10 publications

(5 citation statements)

References 9 publications

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“…Dulieu-Barton, Stress based non-destructive evaluation using thermographic approaches: from laboratory trials to on-site assessment, NDT&E International (2016) 10.1016/j.ndteint.2016.08.005 requirement of a test machine and confirms the findings of [5,9]. The data obtained from the current experiments is an improvement over that shown in [5] largely attributable to the improvement of the spatial and temporal resolution of the detector. …”

Section: Laboratory Trial Resultssupporting

confidence: 75%

Stress based non-destructive evaluation using thermographic approaches: From laboratory trials to on-site assessment

Tighe

Howell

Tyler³

et al. 2016

NDT & E International

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Vibration based loading has been successfully used to facilitate out of laboratory inspections using thermoelastic stress analysis enabling stress based non-destructive assessment of structures. An initial plate study verified the technique. A laboratory demonstrator of the onsite implementation was created to facilitate the development and assessment of a suitable loading device. The developed system was then taken on-site at a coal fired power station during a scheduled outage period. Vibration loaded thermoelastic stress analysis was successfully applied to welds in high pressure steam drain lines in-situ.

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Section: Laboratory Trial Resultssupporting

confidence: 75%

Stress based non-destructive evaluation using thermographic approaches: From laboratory trials to on-site assessment

Tighe

Howell

Tyler³

et al. 2016

NDT & E International

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“…Initial work The thermoel loading howe ations are iden scribed in the hniques and re d c) TSA ΔT us ts involves the dd complexity ed a range o be carried ou struct the DIC to be used and he use of a fas extracted using approach with hrough the use dered. Natura using TSA [7] ncies to enable aircraft panels ls [9] , shown in showed that i lastic response ever when line ntified in both e present paper emote loading sing natural…”

Section: Introductionmentioning

confidence: 66%

Resonant loading of aircraft secondary structure panels for use with thermoelastic stress analysis and digital image correlation

2015

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Thermoelastic stress analysis (TSA) is an established active thermographic approach which uses the thermoelastic effect to correlate the temperature change that occurs as a material is subjected to elastic cyclic loading to the sum of the principal stresses on the surface of the component. Digital image correlation (DIC) tracks features on the surface of a material to establish a displacement field of a component subjected to load, which can then be used to calculate the strain field. The application of both DIC and TSA on a composite plate representative of aircraft secondary structure subject to resonant frequency loading using a portable loading device, i.e. 'remote loading' is described. Laboratory based loading for TSA and DIC is typically imparted using a test machine, however in the current work a vibration loading system is used which is able to excite the component of interest at resonant frequency which enables TSA and DIC to be carried out. The accuracy of the measurements made under remote loading of both of the optical techniques applied is discussed. The data are compared to extract complimentary information from the two techniques. This work forms a step towards a combined strain based non-destructive evaluation procedure able to identify and quantify the effect of defects more fully, particularly when examining component performance in service applications.

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“…increasing the loading frequency. Equation (5) can be solved analytically for certain problems such as a plate subjected to pure bending vibration [6]. However, for most cases, it is more practical to use numerical techniques to obtain the solutions in terms of the temperature change.…”

Section: Theorymentioning

confidence: 99%

Assessment of Non-Adiabatic Behaviour in Thermoelastic Stress Analysis of Small Scale Components

Wang

Dulieu-Barton

2009

Exp Mech

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The classical thermoelastic equation and the generalized heat conduction equation are developed to deal with a non-adiabatic response in thermoelastic stress analysis. A FE simulation procedure is set up to solve the heat conduction equation over a range of loading frequencies. A small disc (20 mm diameter) loaded under threepoint diametric compression is used to examine the effect of in-plane heat conduction. As the disc has regions of zero, moderate and high stress gradients it is an ideal component for this analysis. A regime is developed that provides a basis for an assessment of the nature of the response and allows a minimum loading frequency to be identified so that adiabatic behaviour is obtained. This validity of this approach is demonstrated on steel disc of 20 mm diameter. A special loading device has been designed to obtain the three-point loading and a recently introduced Instron Electropuls test machine is used to achieve the high levels of cyclic loading required for the adiabatic conditions.

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Thermoelastic Stress Analysis of Structures Under Natural Vibrations

Cited by 10 publications

References 9 publications

Stress based non-destructive evaluation using thermographic approaches: From laboratory trials to on-site assessment

Stress based non-destructive evaluation using thermographic approaches: From laboratory trials to on-site assessment

Resonant loading of aircraft secondary structure panels for use with thermoelastic stress analysis and digital image correlation

Assessment of Non-Adiabatic Behaviour in Thermoelastic Stress Analysis of Small Scale Components

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