Here, there and everywhere: The art and science of optics at work

Ambrosini, Dario; Ferraro, Pietro

doi:10.1016/j.optlaseng.2018.01.009

Cited by 4 publications

(5 citation statements)

References 65 publications

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“…Terahertz (THz)-based NDT technology has become a promising technique for composite inspection within last decade [46,47]. Research papers on the shearography technique is low, but it was promoted significantly by the invention of the laser in the 1960s [48], thus it is wellestablished and widely used for industrial NDT, especially in aerospace [49,50]. Although neutron imaging shares similar principles to X-ray imaging, the generation of neutrons is more expensive than for X-rays, the former requiring either a nuclear reactor or spallation process [51].…”

Section: Figure 4 a Comparison Of Publication Numbers On Various Ndt mentioning

confidence: 99%

Non-destructive testing and evaluation of composite materials/structures: A state-of-the-art review

Wang

Zhong

Lee

et al. 2020

Advances in Mechanical Engineering

348

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Composite materials/structures are advancing in product efficiency, cost-effectiveness and the development of superior specific properties. There are increasing demands in their applications to load-carrying structures in aerospace, wind turbines, transportation, and medical equipment, etc. Thus robust and reliable non-destructive testing (NDT) of composites is essential to reduce safety concerns and maintenance costs. There have been various NDT methods built upon different principles for quality assurance during the whole lifecycle of a composite product. This paper reviews the most established NDT techniques for detection and evaluation of defects/damage evolution in composites. These include acoustic emission, ultrasonic testing, infrared thermography, terahertz testing, shearography, digital image correlation, as well as X-ray and neutron imaging. For each NDT technique, we cover a brief historical background, principles, standard practices, equipment and facilities used for composite research. We also compare and discuss their benefits and limitations, and further summarise their capabilities and applications to composite structures. Each NDT technique has its own potential and rarely achieves a full-scale diagnosis of structural integrity. Future development of NDT techniques for composites will be directed towards intelligent and automated inspection systems with high accuracy and efficient data processing capabilities.

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Section: Figure 4 a Comparison Of Publication Numbers On Various Ndt mentioning

confidence: 99%

Non-destructive testing and evaluation of composite materials/structures: A state-of-the-art review

Wang

Zhong

Lee

et al. 2020

Advances in Mechanical Engineering

348

View full text Add to dashboard Cite

show abstract

“…Often, these measurements necessitate refractive index matching, as discussed, e.g., by Budwig . Reviews and comparisons of optical techniques are provided amongst others by Ambrosini and Ferraro or Kulkarni and Rastogi . Heindel provides an overview on X‐ray flow visualization methods such as radiography, stereography and computed tomography while also depicting current challenges and opportunities.…”

Section: Particle Swarm Characterizationmentioning

confidence: 99%

“…Another example with increasing popularity is the development of optical methods used for example in refraction‐based measurement techniques, namely interferometry, schlieren and shadowgraph techniques . They are already extensively applied for the visualization of inhomogeneities in continuous media, see for an overview.…”

Section: Interface Characterizationmentioning

confidence: 99%

“…This work focusses on optical techniques that currently are promoted by progress in material science and manufacturing technology, leading for example to smaller and higher resolving lens systems and more possibilities concerning optical accessibility. There are already numerous reviews on the details of measurement techniques in general and on specific techniques available. Therefore, this work seeks to provide an overview on measurement techniques and literature closely related to the problems arising in disperse multiphase systems on different size scales.…”

Section: Introductionmentioning

confidence: 99%

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Description of Disperse Multiphase Processes: Quo Vadis?

Hohl

Panckow

Schulz

et al. 2018

Chemie Ingenieur Technik

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The experimental accessibility of disperse systems often is a critical factor when it comes to the development of modeling approaches that intend to converge towards an exact solution. Often, integral or pseudo‐homogeneous values are used to reduce the complexity of the system, but a detailed single particle or interface analysis is crucial to understand relevant effects that also affect the swarm behavior. A high number of experimental techniques with respective limitations and advantages is available to quantify these effects. In this work, an overview on measurement techniques for momentum, heat and mass transfer in particle swarms as well as for the particle size distribution and interface characterization is provided. The industrial applicability is addressed by pointing out the vicinity to the process and the costs of different measurement techniques.

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“…The first two occur in case of high gradients and eddy diffusion and the third one is dominated by molecular diffusion [11]. To achieve a detailed analysis, optical measurement tech-niques in general have the advantage of being less invasive, flexible, and offering high spatial and/or temporal resolutions [12] compared to conventional mass transfer measurements where samples have to be collected.…”

Section: Introductionmentioning

confidence: 99%

Real‐Time Visualization of Internal and External Concentration Fields in Multiphase Systems via Laser‐induced Fluorescence and Rainbow Schlieren Deflectometry During and After Droplet Production

Heine

Schulz

Junne

et al. 2020

Chemie Ingenieur Technik

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The applicability of laser‐induced dye fluorescence (LIF) and rainbow schlieren deflectometry (RSD) for qualitative, non‐invasive real‐time visualization of spatial concentration distributions in two standard reference systems is presented. The combination of LIF and RSD enables measurements inside and outside of droplets and is able to overcome limitations of both measurement techniques. Experimental results in the presence of interfacial phenomena are compared and the connection between inner and outer effects is shown during droplet production at a capillary.

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Here, there and everywhere: The art and science of optics at work

Cited by 4 publications

References 65 publications

Non-destructive testing and evaluation of composite materials/structures: A state-of-the-art review

Non-destructive testing and evaluation of composite materials/structures: A state-of-the-art review

Description of Disperse Multiphase Processes: Quo Vadis?

Real‐Time Visualization of Internal and External Concentration Fields in Multiphase Systems via Laser‐induced Fluorescence and Rainbow Schlieren Deflectometry During and After Droplet Production

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