Thermal imaging and Thermoelastic Stress Analysis of impact damage of composite materials

Krstulović‐Opara, Lovre; Klarin, Branko; Neves, Pedro M.P.F.; Domazet, Željko

doi:10.1016/j.engfailanal.2010.11.010

Cited by 46 publications

(35 citation statements)

References 10 publications

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“…Specifically, detection of dental caries at very early stages of formation has proven to be a key application of thermography in biomedicine by providing diagnostic contrast based on enhanced absorption of light at caries [7][8][9], as opposed to other emerging technologies such as Raman spectroscopy [13] and optical coherence tomography (OCT) [14,15], which rely on changes in scattering of light at caries. Appealing, if not unique, characteristics of thermography include: being no-contact, having the ability to inspect opaque [4,[16][17][18][19][20] and turbid materials [7][8][9], and being scalable [3,4]. Moreover, depending on the application, different types of external excitation, such as optical [7], magnetic [17], mechanical waves [19], electrical [4,16] or even cyclic stress/strain [18], can be utilized to induce the thermal wave field inside the sample.…”

Section: Introductionmentioning

confidence: 99%

“…Appealing, if not unique, characteristics of thermography include: being no-contact, having the ability to inspect opaque [4,[16][17][18][19][20] and turbid materials [7][8][9], and being scalable [3,4]. Moreover, depending on the application, different types of external excitation, such as optical [7], magnetic [17], mechanical waves [19], electrical [4,16] or even cyclic stress/strain [18], can be utilized to induce the thermal wave field inside the sample. A comprehensive review of conventional thermography techniques such as PT and LIT can be found in another paper of this special issue on "Novel Ideas for Infrared Thermography also Applied in Integrated Approaches".…”

Section: Introductionmentioning

confidence: 99%

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Matched-Filter Thermography

Tabatabaei

2018

Applied Sciences

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Conventional infrared thermography techniques, including pulsed and lock-in thermography, have shown great potential for non-destructive evaluation of broad spectrum of materials, spanning from metals to polymers to biological tissues. However, performance of these techniques is often limited due to the diffuse nature of thermal wave fields, resulting in an inherent compromise between inspection depth and depth resolution. Recently, matched-filter thermography has been introduced as a means for overcoming this classic limitation to enable depth-resolved subsurface thermal imaging and improving axial/depth resolution. This paper reviews the basic principles and experimental results of matched-filter thermography: first, mathematical and signal processing concepts related to matched-fileting and pulse compression are discussed. Next, theoretical modeling of thermal-wave responses to matched-filter thermography using two categories of pulse compression techniques (linear frequency modulation and binary phase coding) are reviewed. Key experimental results from literature demonstrating the maintenance of axial resolution while inspecting deep into opaque and turbid media are also presented and discussed. Finally, the concept of thermal coherence tomography for deconvolution of thermal responses of axially superposed sources and creation of depth-selective images in a diffusion-wave field is reviewed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Matched-Filter Thermography

Tabatabaei

2018

Applied Sciences

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“…As it is claimed in the literature [28][29][30] the active infrared thermography (IRT) enables a full field visualization of surface-stress distribution. However, the use of thermoelastic stress analysis (TSA) is needed in such circumstances.…”

Section: Infra-red Thermography (Passive)mentioning

confidence: 99%

Fatigue-Damage Evolution of Notched Composite Multilayered Structures under Tensile Loads

et al. 2018

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The problems discussed in the present paper are well-known both from the theoretical (numerical) and experimental point of view. The novelty of our approach depends on the application of hybrid experimental methods and a comparison of their effectiveness in the description of complicated fatigue problems arising in the analysis of the behavior of laminated panels with open holes and subjected to tensile loading. Three experimental methods were used: infrared thermography (passive), structural health monitoring (active), and digital image correlation. The experimental investigations were supplemented by the finite element description of the problem dealing mainly with the static behavior, monitoring the development and final fracture of composites. The considerations concern laminated panels oriented at ±45 • with different types of holes, i.e., vertical elliptical, horizontal elliptical, and circular.

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“…1 LIT, compared to most other NDT techniques, has the advantages of being non-contact, having the ability to inspect opaque [1][2][3][4][5][6] and turbid materials, [7][8][9] and being scalable (e.g., microscopic LIT of leakages in integrated circuits 2 vs. inspection of airplane parts 6 ). Moreover, depending on the application, different types of external excitation, such as optical, 8 electrical, 1,2,10 magnetic, 3 mechanical waves (ultrasound) 5 or even cyclic stress/strain, 4 can be utilized to induce the thermal wave field inside the sample. Due to these promising abilities, LIT has been successfully implemented in research for defect detection and evaluation of broad range of materials, spanning from composite materials, 10 to semiconductor, 11 to biological hard tissues.…”

confidence: 99%