Anisotropy in carbon fiber reinforced polymer (CFRP) and its effect on induction thermography

Guo, Jianguang; Gao, Xiaorong; Toma, Ewald; Netzelmann, U.

doi:10.1016/j.ndteint.2017.05.004

Cited by 28 publications

(9 citation statements)

References 9 publications

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“…The contrast in the phase image resembles typical contrasts obrained from surface cracks in metals. Reference measurements by x-ray CT proved the existence of fiber cracking and showed inner delaminations as known to be generated by impacts [4]. The damaged region is very clearly visible in the induction thermography phase image, usually better than in the corresponding amplitude image.…”

Section: Multi-ply Woven Fabric With Impact Damagementioning

confidence: 91%

“…Experimentally, induction thermography of CFRP has been performed in early studies [2,3]. Other work on CFRP is cited in [4]. In [4] it was shown that even uni-axially oriented material can be heated by induction.…”

Section: Introductionmentioning

confidence: 99%

“…Other work on CFRP is cited in [4]. In [4] it was shown that even uni-axially oriented material can be heated by induction. In this work, modeling of CFRP plates was refined and some phenomena were more clearly explained.…”

Section: Introductionmentioning

confidence: 99%

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Induction thermography on CFRP and the role of anisotropy

Netzelmann¹,

Guo²

2018

Proceedings of the 2018 International Conference on Quantitative InfraRed Thermography

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Experiments were performed by induction thermography on carbon fibre reinforced plates. Uni-axial, bi-axial materials as well as woven fabric were studied. The uni-axial material was investigated as a function of the fibre orientation angle and showed heating far away from the inductor and heating patterns with local minima. The occurrence of minima was explained by induction current cancellation effects. The experimentally measured thermal contrast patterns were confirmed by the results of numerical simulations. Fiber breakage could be detected better by induction thermography than by optically excited thermography.

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Section: Multi-ply Woven Fabric With Impact Damagementioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

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Induction thermography on CFRP and the role of anisotropy

Netzelmann¹,

Guo²

2018

Proceedings of the 2018 International Conference on Quantitative InfraRed Thermography

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“…В обширной литературе имеются данные о механических и тепловых свойствах искусственных армированных волокнами композитов [3][4][5], древесины [6][7][8][9][10] и слоистых материалов на ее основе [11], а также композитов с природными органическими волокнами [12]. В них сведения о механических и тепловых свойствах получены в независимых экспериментах и не сопоставляются друг с другом, за исключением нескольких работ, в которых методами тепловой дефектоскопии оценивались различные структурные повреждения в композитах [13][14][15][16] и их возможное влияние на прочность. В настоящей работе на примере естественного волокнистого композитного материала -древесины сосны обыкновенной (Pínus sylvéstris L), не содержащей видимых дефектов строения и механических повреждений (сучков, свилеватости, глазков, расслоений, трещин и т.…”

Section: поступило в редакцию 17 сентября 2020 г в окончательной редunclassified

Связь Механических Свойств Анизотропных Материалов С Их Теплофизическими Характеристиками На Примере Древесины Сосны

Головин¹,

Тюрин²,

Golovin³

et al. 2021

Письма В Журнал Технической Физики

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The paper discusses experimentally found relation between mechanical an thermal physical properties of anisotropic materials observed at the pine wood (Pínus sylvéstris L). Hardness and main components of temperature diffusivity tensor measured at the normal to the fibers, tangential and radial faces of the pine wood sample having various moisture content can be linked with linear relations. It renders possible to make express estimation of anisotropic materials mechanical properties typically requiring labor and material extensive destructive testing by means of measurement of its thermal properties using dynamic thermography.

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“…However, the mechanical and thermal properties are measured in separate tests executed on different samples and are not related to each other, except for several papers that use thermal non-destructive testing to estimate structural damage of wood [23][24][25], defects [26,27], porosity [28], and anisotropy [29,30] of composites and their possible impact on material mechanical properties. In [31], a micromechanical model for the prediction of effective thermal conductivity in two-and three-phase composites is proposed.…”

Section: Introductionmentioning

confidence: 99%

Relationship between Thermal Diffusivity and Mechanical Properties of Wood

et al. 2022

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This paper describes an experimental study of the relationships between thermal diffusivity and mechanical characteristics including Brinell hardness, microhardness, and Young’s modulus of common pine (Pinus sylvestris L.), pedunculate oak (Quercus robur L.), and small-leaf lime (Tilia cordata Mill.) wood. A dependence of Brinell hardness and thermal diffusivity tensor components upon humidity for common pine wood is found. The results of the measurement of Brinell hardness, microhardness, Young’s modulus, and main components of thermal diffusivity tensor for three perpendicular cuts are found to be correlated. It is shown that the mechanical properties correlate better with the ratio of longitude to transversal thermal diffusivity coefficients than with the respective individual absolute values. The mechanical characteristics with the highest correlation with the abovementioned ratio are found to be the ratio of Young’s moduli in longitude and transversal directions. Our technique allows a comparative express assessment of wood mechanical properties by means of a contactless non-destructive measurement of its thermal properties using dynamic thermal imaging instead of laborious and material-consuming destructive mechanical tests.

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Anisotropy in carbon fiber reinforced polymer (CFRP) and its effect on induction thermography

Cited by 28 publications

References 9 publications

Induction thermography on CFRP and the role of anisotropy

Induction thermography on CFRP and the role of anisotropy

Связь Механических Свойств Анизотропных Материалов С Их Теплофизическими Характеристиками На Примере Древесины Сосны

Relationship between Thermal Diffusivity and Mechanical Properties of Wood

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