Abstract
Dynamic thermal tomography is a technique that allows the display of “slices” of solids by analyzing the evolution of surface temperature as a function of time. This paper presents the principles of one-sided thermal tomography using reference points and also introduces a technique of thermal tomography that does not require the use of reference point. The diffusion nature of heat conduction in solids causes lateral diffusion, which modifies and complicates the heat flow that is needed to detect defects. In the case of anisotropic composite materials the heat will diffuse more readily in one direction than another. Lateral diffusion can make it difficult to detect (visualize) deep defects, especially those located under shallower ones. Artifacts can be reduced by thresholding timegrams but this may hide small defects. The effectiveness of thermal tomography in detecting impact damage (cracks/delaminations) in composites has been confirmed by numerous experiments.
| Original language | English |
|---|---|
| Article number | 2 |
| Journal | Journal of Nondestructive Evaluation |
| Volume | 38 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 1 Jan 2019 |
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Keywords
- Composite
- Impact damage
- Thermal testing
- Thermal tomography
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
Cite this
Dynamic Thermal Tomography of Composites : A Comparison of Reference and Reference-Free Approaches. / Vavilov, Vladimir P.; Kuimova, Marina V.
In: Journal of Nondestructive Evaluation, Vol. 38, No. 1, 2, 01.01.2019.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Dynamic Thermal Tomography of Composites
T2 - A Comparison of Reference and Reference-Free Approaches
AU - Vavilov, Vladimir P.
AU - Kuimova, Marina V.
PY - 2019/1/1
Y1 - 2019/1/1
N2 - Dynamic thermal tomography is a technique that allows the display of “slices” of solids by analyzing the evolution of surface temperature as a function of time. This paper presents the principles of one-sided thermal tomography using reference points and also introduces a technique of thermal tomography that does not require the use of reference point. The diffusion nature of heat conduction in solids causes lateral diffusion, which modifies and complicates the heat flow that is needed to detect defects. In the case of anisotropic composite materials the heat will diffuse more readily in one direction than another. Lateral diffusion can make it difficult to detect (visualize) deep defects, especially those located under shallower ones. Artifacts can be reduced by thresholding timegrams but this may hide small defects. The effectiveness of thermal tomography in detecting impact damage (cracks/delaminations) in composites has been confirmed by numerous experiments.
AB - Dynamic thermal tomography is a technique that allows the display of “slices” of solids by analyzing the evolution of surface temperature as a function of time. This paper presents the principles of one-sided thermal tomography using reference points and also introduces a technique of thermal tomography that does not require the use of reference point. The diffusion nature of heat conduction in solids causes lateral diffusion, which modifies and complicates the heat flow that is needed to detect defects. In the case of anisotropic composite materials the heat will diffuse more readily in one direction than another. Lateral diffusion can make it difficult to detect (visualize) deep defects, especially those located under shallower ones. Artifacts can be reduced by thresholding timegrams but this may hide small defects. The effectiveness of thermal tomography in detecting impact damage (cracks/delaminations) in composites has been confirmed by numerous experiments.
KW - Composite
KW - Impact damage
KW - Thermal testing
KW - Thermal tomography
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U2 - 10.1007/s10921-018-0540-y
DO - 10.1007/s10921-018-0540-y
M3 - Article
VL - 38
JO - Journal of Nondestructive Evaluation
JF - Journal of Nondestructive Evaluation
SN - 0195-9298
IS - 1
M1 - 2
ER -