Characterization of plasma sprayed coatings using thermal wave infrared video imaging

Ahmed, T.; Feng, Zhaoying; Kuo, P. K.; Hartikainen, J.; Jaarinen, J.

doi:10.1007/bf00566844

Cited by 13 publications

(4 citation statements)

References 4 publications

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“…The sensing side of thermography customarily uses IR cameras [3][4][5][9][10][11]. Typically, an IR camera is scanned across the sample surface to measure the temperature profile, or it is used to image the entire specimen.…”

Section: Introductionmentioning

confidence: 99%

“…For example, Vavilov and Spicer [3,4] experimented with methods to determine not only damage location, but also depth. Vozar [7] evaluated step-heating and flash methods while Ahmed [10] experimented with various imaging techniques. While IR cameras demonstrate the promise of thermography, in situ methods to sense structural damage incurred during real-time operation are desired.…”

Section: Introductionmentioning

confidence: 99%

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Nondestructive Evaluation Technique Utilizing Embedded Thermal Fiber Optic Sensors

Stewart¹,

Carman

Richards

2003

Journal of Composite Materials

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We investigated a thermal nondestructive evaluation (NDE) technique based on thermography that uses optical fiber thermal sensors to detect damage within a laminated graphite epoxy composite specimen. Two sets of composite samples were used for testing, one set had fiber optic sensors embedded between the layers while the other relied on thermocouple sensors attached to the exterior. A simulated impact system was used to induce damage of varying degrees into the samples. The damage was confirmed either with X-ray or C-scan imaging. The test apparatus in addition to the test data obtained from both sets of samples are presented. The data confirms that the fiber optic thermal sensors can not only detect the presence of damage, but can measure the severity of damage as well. This is the first known attempt to use in situ fiber optic point sensors with thermography to detect damage.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Nondestructive Evaluation Technique Utilizing Embedded Thermal Fiber Optic Sensors

Stewart¹,

Carman

Richards

2003

Journal of Composite Materials

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show abstract

“…For example, Spicer and Vavilov [3,4] experimented with methods to determine not only damage location, but also depth. Vozar [7] evaluated step-heating and flash methods while Ahmed [10] experimented with various imaging techniques. While IR cameras demonstrate the promise of thermography, in-situ methods to sense the damage are desired.…”

Section: Introductionmentioning

confidence: 99%

“…In contrast to heating techniques, the sensing side of thermography is customarily performed with IR cameras [3,4,5,9,10,11]. Typically, an IR camera is scanned across the sample surface to measure the temperature profile, or it is used to image the entire specimen.…”

Section: Introductionmentioning

confidence: 99%

<title>Use of imbedded fiber optic thermal sensors to monitor the health of composite structures</title>

2002

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We investigated a thermal nondestructive evaluation (NDE) technique based on thermography that uses optical fiber sensors to detect damage within a laminated graphite epoxy composite specimen. Two sets of composite samples were used for testing, one set had fiber optic sensors imbedded between the layers and the other set did not. Thermocouples were attached to the front and back surfaces of all coupons for comparison. Damage was initiated in the samples at various levels with a simulated impact system and damage was confirmed with X-ray. Results suggest that the thermal approach is more sensitive to damage than the X-ray evaluation used. The test apparatus in addition to the results obtained from both sets of samples are presented.

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Numerical estimation of the spatial resolution of thermal NDT techniques based on flash heating

Rantala

Hartikainen

1991

Res Nondestr Eval

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Characterization of plasma sprayed coatings using thermal wave infrared video imaging

Cited by 13 publications

References 4 publications

Nondestructive Evaluation Technique Utilizing Embedded Thermal Fiber Optic Sensors

Nondestructive Evaluation Technique Utilizing Embedded Thermal Fiber Optic Sensors

<title>Use of imbedded fiber optic thermal sensors to monitor the health of composite structures</title>

Numerical estimation of the spatial resolution of thermal NDT techniques based on flash heating

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