Crack Detection in Large Welded Components Under Fatigue Using TSA

Robinson, Andrew; Dulieu-Barton, J.M.; Quinn, Simon; Howarth, David

doi:10.1007/978-3-319-00876-9_6

Cited by 2 publications

(3 citation statements)

References 3 publications

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“…Recent publications regarding TSA have focused on applications, including detecting and studying stress fields around crack tips, studying stress fields in non-isotropic materials, measuring residual stresses and combining TSA with other experimental techniques such as photoelasticity and DIC (digital image correlation) [3][4][5][6].…”

Section: Thermoelasticmentioning

confidence: 99%

Determination of a U-Notch Stress Concentration Factor Using Thermoelasticity

Vieira¹,

Philip²,

Gonzáles³

et al. 2016

JMEA

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This paper uses the TSA (thermoelastic stress analysis) technique to determine the stress concentration factor (Kt) of a U-notch in an aluminum plate, and then compares the results with those obtained from a FEA (finite elements analysis) of the same specimen. In order to do so, it devises a calculation procedure to extrapolate the thermoelastic data near the tip of the notch and then applies the resulting algorithm to seven distinct experiments that had different loading frequencies, mean loads and load ranges. The overall positive results suggest that the technique may be suitable for Kt measurements in real-world structures. A discussion about the calibration factor of the thermoelastic data is included by confronting the calibration results using independent tensile uniaxial tests and using the U-notch TSA and FEA paired specimen data.

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Section: Thermoelasticmentioning

confidence: 99%

Determination of a U-Notch Stress Concentration Factor Using Thermoelasticity

Vieira¹,

Philip²,

Gonzáles³

et al. 2016

JMEA

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“…. [2][3][4][5][6][7][8][9]. Recent research programs have also aimed at developing and using lower cost equipment for TSA applications [8].…”

Section: Tsamentioning

confidence: 99%

“…Advanced research on extending the application of TSA to real world field structural components, where quasi-cyclic service loading actuates and adiabatic conditions do not prevail, is on-going, as discussed in Refs. [6,8,9] for example.…”

Section: Using Thermoelastic Stress Analysis To Detect Damaged and Homentioning

confidence: 99%

Using Thermoelastic Stress Analysis to Detect Damaged and Hot Spot Areas in Structural Components

Freire¹,

Waugh²,

Fruehmann³

et al. 2015

JMEA

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This paper discusses the suitability of using TSA (thermoelastic stress analysis) as an advanced tool to detect damaged areas and highly stressed (hot spot) areas in structural components. Such components can be, for example, parts of large structural panels built of welded metallic or composite materials. Besides detecting hot spot areas, it is expected that stresses in these areas can be suitably quantified and processed in order to predict crack initiation and propagation due to in-service loads. The paper starts with references to selected review and application articles on the subject. Two simple laboratory experiments are presented which illustrate the quality of the results that can be achieved using TSA. In the first experiment, a stainless steel T-joint designed to model a welded structural component is analysed. The T-joint had a machine-notched crack-like flaw close to the component's weld toe. The qualitative and quantitative experimental results determined along four specified areas of the T-joint model showed that TSA can indeed be used as a tool to detect loaded cracks and hot spots in large metallic structures, and that stresses can be accurately evaluated. In the second experiment, a prismatic bar made of CFRE (carbon fibre-reinforced-epoxy) was tested to locate three subsurface areas of damage introduced beforehand into the component. Two of these inside damaged areas were detected to be 3.1 mm and 7.1 mm from the observed surface. The positive results achieved with the two lab experiments, along with a review of the selected research publications, indicate that TSA application can be extended to the real-world field of structural components. Topics to be addressed in this research field should have to do with components that work under random or quasi-cyclic service loading, problems where adiabatic conditions do not prevail, and reduction of the cost of infra-red cameras.

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Crack Detection in Large Welded Components Under Fatigue Using TSA

Cited by 2 publications

References 3 publications

Determination of a U-Notch Stress Concentration Factor Using Thermoelasticity

Determination of a U-Notch Stress Concentration Factor Using Thermoelasticity

Using Thermoelastic Stress Analysis to Detect Damaged and Hot Spot Areas in Structural Components

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